Accelerometry: Qualitative and quantitative measurement of MOVEMENT patterns.Acceleration: An increase in the rate of speed.Actigraphy: The measurement and recording of MOTOR ACTIVITY to assess rest/activity cycles.Motor Activity: The physical activity of a human or an animal as a behavioral phenomenon.Monitoring, Ambulatory: The use of electronic equipment to observe or record physiologic processes while the patient undergoes normal daily activities.Sedentary Lifestyle: Usual level of physical activity that is less than 30 minutes of moderate-intensity activity on most days of the week.Exercise: Physical activity which is usually regular and done with the intention of improving or maintaining PHYSICAL FITNESS or HEALTH. Contrast with PHYSICAL EXERTION which is concerned largely with the physiologic and metabolic response to energy expenditure.Deglutition: The act of taking solids and liquids into the GASTROINTESTINAL TRACT through the mouth and throat.Energy Metabolism: The chemical reactions involved in the production and utilization of various forms of energy in cells.Diagnostic Techniques, Digestive System: Methods and procedures for the diagnosis of diseases or dysfunction of the digestive system or its organs or demonstration of their physiological processes.Walking: An activity in which the body advances at a slow to moderate pace by moving the feet in a coordinated fashion. This includes recreational walking, walking for fitness, and competitive race-walking.Neuromuscular Blockade: The intentional interruption of transmission at the NEUROMUSCULAR JUNCTION by external agents, usually neuromuscular blocking agents. It is distinguished from NERVE BLOCK in which nerve conduction (NEURAL CONDUCTION) is interrupted rather than neuromuscular transmission. Neuromuscular blockade is commonly used to produce MUSCLE RELAXATION as an adjunct to anesthesia during surgery and other medical procedures. It is also often used as an experimental manipulation in basic research. It is not strictly speaking anesthesia but is grouped here with anesthetic techniques. The failure of neuromuscular transmission as a result of pathological processes is not included here.Monitoring, Physiologic: The continuous measurement of physiological processes, blood pressure, heart rate, renal output, reflexes, respiration, etc., in a patient or experimental animal; includes pharmacologic monitoring, the measurement of administered drugs or their metabolites in the blood, tissues, or urine.Self Report: Method for obtaining information through verbal responses, written or oral, from subjects.Reproducibility of Results: The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.Tremor: Cyclical movement of a body part that can represent either a physiologic process or a manifestation of disease. Intention or action tremor, a common manifestation of CEREBELLAR DISEASES, is aggravated by movement. In contrast, resting tremor is maximal when there is no attempt at voluntary movement, and occurs as a relatively frequent manifestation of PARKINSON DISEASE.Physical Fitness: The ability to carry out daily tasks and perform physical activities in a highly functional state, often as a result of physical conditioning.Calorimetry, Indirect: Calculation of the energy expenditure in the form of heat production of the whole body or individual organs based on respiratory gas exchange.Body Mass Index: An indicator of body density as determined by the relationship of BODY WEIGHT to BODY HEIGHT. BMI=weight (kg)/height squared (m2). BMI correlates with body fat (ADIPOSE TISSUE). Their relationship varies with age and gender. For adults, BMI falls into these categories: below 18.5 (underweight); 18.5-24.9 (normal); 25.0-29.9 (overweight); 30.0 and above (obese). (National Center for Health Statistics, Centers for Disease Control and Prevention)Cross-Sectional Studies: Studies in which the presence or absence of disease or other health-related variables are determined in each member of the study population or in a representative sample at one particular time. This contrasts with LONGITUDINAL STUDIES which are followed over a period of time.Obesity: A status with BODY WEIGHT that is grossly above the acceptable or desirable weight, usually due to accumulation of excess FATS in the body. The standards may vary with age, sex, genetic or cultural background. In the BODY MASS INDEX, a BMI greater than 30.0 kg/m2 is considered obese, and a BMI greater than 40.0 kg/m2 is considered morbidly obese (MORBID OBESITY).Neuromuscular Nondepolarizing Agents: Drugs that interrupt transmission at the skeletal neuromuscular junction without causing depolarization of the motor end plate. They prevent acetylcholine from triggering muscle contraction and are used as muscle relaxants during electroshock treatments, in convulsive states, and as anesthesia adjuvants.Running: An activity in which the body is propelled by moving the legs rapidly. Running is performed at a moderate to rapid pace and should be differentiated from JOGGING, which is performed at a much slower pace.Deglutition Disorders: Difficulty in SWALLOWING which may result from neuromuscular disorder or mechanical obstruction. Dysphagia is classified into two distinct types: oropharyngeal dysphagia due to malfunction of the PHARYNX and UPPER ESOPHAGEAL SPHINCTER; and esophageal dysphagia due to malfunction of the ESOPHAGUS.Television: The transmission and reproduction of transient images of fixed or moving objects. An electronic system of transmitting such images together with sound over a wire or through space by apparatus that converts light and sound into electrical waves and reconverts them into visible light rays and audible sound. (From Webster, 3rd ed)Overweight: A status with BODY WEIGHT that is above certain standard of acceptable or desirable weight. In the scale of BODY MASS INDEX, overweight is defined as having a BMI of 25.0-29.9 kg/m2. Overweight may or may not be due to increases in body fat (ADIPOSE TISSUE), hence overweight does not equal "over fat".Body Composition: The relative amounts of various components in the body, such as percentage of body fat.Calorimetry: The measurement of the quantity of heat involved in various processes, such as chemical reactions, changes of state, and formations of solutions, or in the determination of the heat capacities of substances. The fundamental unit of measurement is the joule or the calorie (4.184 joules). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Questionnaires: Predetermined sets of questions used to collect data - clinical data, social status, occupational group, etc. The term is often applied to a self-completed survey instrument.Anthropometry: The technique that deals with the measurement of the size, weight, and proportions of the human or other primate body.Physical Exertion: Expenditure of energy during PHYSICAL ACTIVITY. Intensity of exertion may be measured by rate of OXYGEN CONSUMPTION; HEAT produced, or HEART RATE. Perceived exertion, a psychological measure of exertion, is included.Child Behavior: Any observable response or action of a child from 24 months through 12 years of age. For neonates or children younger than 24 months, INFANT BEHAVIOR is available.Gait: Manner or style of walking.Signal Processing, Computer-Assisted: Computer-assisted processing of electric, ultrasonic, or electronic signals to interpret function and activity.Linear Models: Statistical models in which the value of a parameter for a given value of a factor is assumed to be equal to a + bx, where a and b are constants. The models predict a linear regression.Calibration: Determination, by measurement or comparison with a standard, of the correct value of each scale reading on a meter or other measuring instrument; or determination of the settings of a control device that correspond to particular values of voltage, current, frequency or other output.Exercise Test: Controlled physical activity which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used.Life Style: Typical way of life or manner of living characteristic of an individual or group. (From APA, Thesaurus of Psychological Index Terms, 8th ed)Schools: Educational institutions.Heart Rate: The number of times the HEART VENTRICLES contract per unit of time, usually per minute.Adiposity: The amount of fat or lipid deposit at a site or an organ in the body, an indicator of body fat status.Health Behavior: Behaviors expressed by individuals to protect, maintain or promote their health status. For example, proper diet, and appropriate exercise are activities perceived to influence health status. Life style is closely associated with health behavior and factors influencing life style are socioeconomic, educational, and cultural.Movement: The act, process, or result of passing from one place or position to another. It differs from LOCOMOTION in that locomotion is restricted to the passing of the whole body from one place to another, while movement encompasses both locomotion but also a change of the position of the whole body or any of its parts. Movement may be used with reference to humans, vertebrate and invertebrate animals, and microorganisms. Differentiate also from MOTOR ACTIVITY, movement associated with behavior.Body Weight: The mass or quantity of heaviness of an individual. It is expressed by units of pounds or kilograms.Absorptiometry, Photon: A noninvasive method for assessing BODY COMPOSITION. It is based on the differential absorption of X-RAYS (or GAMMA RAYS) by different tissues such as bone, fat and other soft tissues. The source of (X-ray or gamma-ray) photon beam is generated either from radioisotopes such as GADOLINIUM 153, IODINE 125, or Americanium 241 which emit GAMMA RAYS in the appropriate range; or from an X-ray tube which produces X-RAYS in the desired range. It is primarily used for quantitating BONE MINERAL CONTENT, especially for the diagnosis of OSTEOPOROSIS, and also in measuring BONE MINERALIZATION.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Algorithms: A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.Regression Analysis: Procedures for finding the mathematical function which best describes the relationship between a dependent variable and one or more independent variables. In linear regression (see LINEAR MODELS) the relationship is constrained to be a straight line and LEAST-SQUARES ANALYSIS is used to determine the best fit. In logistic regression (see LOGISTIC MODELS) the dependent variable is qualitative rather than continuously variable and LIKELIHOOD FUNCTIONS are used to find the best relationship. In multiple regression, the dependent variable is considered to depend on more than a single independent variable.Activities of Daily Living: The performance of the basic activities of self care, such as dressing, ambulation, or eating.Oxygen Consumption: The rate at which oxygen is used by a tissue; microliters of oxygen STPD used per milligram of tissue per hour; the rate at which oxygen enters the blood from alveolar gas, equal in the steady state to the consumption of oxygen by tissue metabolism throughout the body. (Stedman, 25th ed, p346)Health Promotion: Encouraging consumer behaviors most likely to optimize health potentials (physical and psychosocial) through health information, preventive programs, and access to medical care.Longitudinal Studies: Studies in which variables relating to an individual or group of individuals are assessed over a period of time.Feasibility Studies: Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.Sex Factors: Maleness or femaleness as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or effect of a circumstance. It is used with human or animal concepts but should be differentiated from SEX CHARACTERISTICS, anatomical or physiological manifestations of sex, and from SEX DISTRIBUTION, the number of males and females in given circumstances.Research Design: A plan for collecting and utilizing data so that desired information can be obtained with sufficient precision or so that an hypothesis can be tested properly.Age Factors: Age as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or the effect of a circumstance. It is used with human or animal concepts but should be differentiated from AGING, a physiological process, and TIME FACTORS which refers only to the passage of time.

Objectively measured physical activity and C-reactive protein: National Health and Nutrition Examination Survey 2003-2004. (1/226)

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Evaluation of 2 self-report measures of physical activity with accelerometry in young adults. (2/226)

BACKGROUND: The purpose of this paper is to evaluate self-reported physical activity of young adults using 1-week and 1-year recall measures with an accelerometer as the criterion measure. METHODS: Participants were a subsample (N = 121, 24 +/- 1.7 yrs) from a large longitudinal cohort study. Participants completed a detailed 1-year physical activity recall, wore an accelerometer for 1 week and then completed a brief 1-week physical activity recall when they returned the accelerometer. RESULTS: Mean values for moderate-to-vigorous physical activity (MVPA) from the 3 instruments were 3.2, 2.2, and 13.7 hours/wk for the accelerometer, 1-week recall, and 1-year recall, respectively (all different from each other, P < .001). Spearman correlations for moderate, vigorous, and MVPA between the accelerometer and the 1-week recall (0.30, 0.50, and 0.40, respectively) and the 1-year recall (0.31, 0.42, and 0.44, respectively) demonstrated adequate validity. CONCLUSIONS: Both recall instruments may be used for ranking physical activity at the group level. At the individual level, the 1-week recall performed much better in terms of absolute value of physical activity. The 1-year recall overestimated total physical activity but additional research is needed to fully test its validity.  (+info)

A worksite vitality intervention to improve older workers' lifestyle and vitality-related outcomes: results of a randomised controlled trial. (3/226)

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Energy cost of common activities in children and adolescents. (4/226)

BACKGROUND: The Compendium of Energy Expenditures for Youth assigns MET values to a wide range of activities. However, only 35% of activity MET values were derived from energy cost data measured in youth; the remaining activities were estimated from adult values. PURPOSE: To determine the energy cost of common activities performed by children and adolescents and compare these data to similar activities reported in the compendium. METHODS: Thirty-two children (8-11 years old) and 28 adolescents (12-16 years) completed 4 locomotion activities on a treadmill (TRD) and 5 age-specific activities of daily living (ADL). Oxygen consumption was measured using a portable metabolic analyzer. RESULTS: In children, measured METs were significantly lower than compendium METs for 3 activities [basketball, bike riding, and Wii tennis (1.1-3.5 METs lower)]. In adolescents, measured METs were significantly lower than compendium METs for 4 ADLs [basketball, bike riding, board games, and Wii tennis (0.3-2.5 METs lower)] and 3 TRDs [2.24 m . s(-1), 1.56 m . s(-1), and 1.34 m . s(-1) (0.4-0.8 METs lower)]. CONCLUSION: The Compendium of Energy Expenditures for Youth is an invaluable resource to applied researchers. Inclusion of empirically derived data would improve the validity of the Compendium of Energy Expenditures for Youth.  (+info)

Effect of a physical activity intervention on the metabolic syndrome in Pakistani immigrant men: a randomized controlled trial. (5/226)

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Use of accelerometry to measure physical activity in adults and the elderly. (6/226)

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Social cognitive influences on physical activity participation in long-term breast cancer survivors. (7/226)

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Habitual levels of high, but not moderate or low, impact activity are positively related to hip BMD and geometry: results from a population-based study of adolescents. (8/226)

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*Signal magnitude area

". "Classifying prosthetic use via accelerometry in persons with transtibial amputations". Journal of Rehabilitation Research ...

*Age-related mobility disability

"Use of Accelerometry to Measure Physical Activity in Older Adults at Risk for Mobility Disability." Journal of aging and ...

*Short-beaked echidna

... using accelerometry and GPS to examine field biomechanics and assess the ecological impact of a widespread, semi-fossorial ...

*Respiratory rate

... photoplethysmogram and accelerometry signals. The typical respiratory rate for a healthy adult at rest is 12-18 breaths per ...

*NIH Toolbox

A comparison of accelerometry and center of pressure measures during computerized dynamic posturography: A measure of balance. ...

*EarlyBird Diabetes Study

It combined objective measures of auxology, body composition (DEXA), physical activity (accelerometry) and metabolic rate (GEM[ ...

*Zephyr Technology

... and 3-axis accelerometry. Zephyr most recent product, ZephyrLIFE, is one of the first entries into the emerging home telehealth ...

*Acoustocerebrography

Cranial Accelerometry Can Detect Cerebral Vasospasm Caused by Subarachnoid Hemorrhage, Smith et al. (2015) Recording and ...

*Walking bus

Seven Day Accelerometry Based Study", British Medical Journal, 331: 1061-1062, doi:10.1136/bmj.38567.382731.ae, PMC 1283187 , ...

*Actigraphy

An update for 2002 Reliability of Accelerometry-Based Activity Monitors: A Generalizability Study. Gregory J. Welk, Jodee A. ...

*Vibratory fluidized bed

... of the Bubble Behavior in Vibrated Fluidized Beds by means of Two-Fluid CFD Simulations Coupled with Accelerometry Data , E. ... of the Bubble Behavior in Vibrated Fluidized Beds by means of Two-Fluid CFD Simulations Coupled with Accelerometry Data' in " ...

*Sailfish

... swimming behavior of sailfish during predator-prey interactions using high-speed video and accelerometry". Integrative and ...
Background: Epidemiologic studies examining physical activity have used self-report or the preferred objective measurement devices of pedometers or accelerometers. NHANES 2003-2004 used remuneration, in-person and express mail methods to obtain accelerometer data from 7176 individuals with 4867 (68%) providing 4+ valid days of wear. Herein we describe the experience of another national epidemiologic study that used telephone and regular mail to obtain accelerometer data.. Methods: This is an ancillary study to REGARDS, a national, population-based, longitudinal study of 30,239 blacks and whites, aged , 45 years, enrolled January 2003-October 2007. Participants were recruited from communities across all 48 of the lower United States, and include residents of 1,855 of the 3,033 US counties. Baseline evaluations were conducted through computer-assisted telephone interview (CATI), self-administered questionnaires, and an in-home visit. Participants are followed by CATI every 6 months. Starting with ...
Purpose: This study described the adherence and performance of the accelerometer in a cohort study of adults. Methods: From 2008-2011, 16,415 Hispanic/Latino adults age 18-74 years enrolled in the Hispanic Community Health Study/Study of Latinos. Immediately following the baseline visit, participants wore an Actical accelerometer for one week. This study explored correlates of accelerometer participation and adherence, defined as wearing it for 3-6 days for ,=10 hours each day. Accelerometer performance was assessed by exploring the number of different values of accelerometer counts/minute for each participant. Results: Overall, 92.3% (n=15,153) had at least one day with accelerometer data and 77.7% (n=12,750) were adherent. Both accelerometer participation and adherence were higher among participants who were married or partnered, reported a higher household income, were first generation immigrants, or reported lower sitting time. Accelerometer participation was higher among those with no stair ...
MONDAY, Oct. 23, 2017 (HealthDay News) -- Interactions between genes and physical activity and genes and sedentary behavior may play a role in the development of obesity, according to a study published in the October issue of Diabetes.. Jee-Young Moon, Ph.D., from Albert Einstein College of Medicine in Bronx, New York, and colleagues analyzed interactions of accelerometer-measured moderate-to-vigorous physical activity (MVPA) and sedentary time with genetic variants on obesity among 9,645 U.S. Hispanics/Latinos. Ninety-seven genetic variants associated with body mass index (BMI) were used to calculate an overall genetic risk score (GRS), central nervous system (CNS)-related GRS, and non-CNS GRS.. The researchers found that genetic association with BMI was stronger in individuals with lower MVPA (first tertile) versus higher MVPA (third tertile; Pinteraction = 0.005) and in those with greater sedentary time (third tertile) versus less sedentary time (first tertile; Pinteraction = 0.006). Obesity ...
Results Those selected to be offered an accelerometer were older, more likely to be retired and to have a limiting longstanding illness than participants not in the accelerometry subsample. Seven-day accelerometer wearers were older (OR 1.02, 95% CI 1.02 to1.03) though less likely to be retired (0.77, 0.62 to 0.97) or otherwise economically inactive (0.62, 0.49 to 0.78) or live in a deprived area (0.78, 0.62 to 0.96), and more likely to be ex- (1.42, 1.14 to 1.78) or never-smokers (1.37, 1.13 to 1.67), and to have been moderately physically active in the past month (1.45, 1.20 to 1.75) or met the physical activity recommendations (1.45, 1.17 to 1.79). Four- to seven-day wearers were also older (1.01, 1.01 to 1.02), less likely to be retired (0.77, 0.62 to 0.95) or otherwise economically inactive (0.60, 0.50 to 0.73), but were more likely to have a limiting longstanding illness; differences in self-reported activity were less marked.. ...
Respiration affects the cardiovascular system significantly and this is observed in hemodynamic parameters such as stroke volume and heart rate. The morphology of signals relevant to the heart also changes with respiration. Such changes have been used to extract respiration signal from the electrocardiogram (ECG). It is also shown that accelerometers placed on the body can be used to extract respiration signals. Apart from measuring the respiration rate or estimating the respiration signal morphology, what is also important is to detect the phases of respiration using the same accelerometers. This project mainly focuses on detection of the start and end timings of respiration phases and also discriminating heart beats related to inhaling from those related to exhale phases rather than detecting them alone or computing respiration rates only. Thus, the idea behind this study is to compare the efficacy of accelerometer-derived respiration (ADR) to Electrocardiogram derived respiratory (EDR) in ...
ActiGraph is dedicated to providing our clients with highly accurate, innovative and cost effective objective monitoring solutions to help them achieve their research and clinical data collection, analysis and management objectives.
Because 2 in 5 adults (42%) with rheumatoid arthritis (RA) are inactive, public health initiatives need to address the lack of motivation to exercise and promote the benefits of physical activity in this population, say authors of an article published online in Arthritis Care & Research.. The researchers analyzed data on 176 patients with RA, 18 years of age or older, enrolled in a randomized controlled trial to assess the effectiveness of an intervention promoting physical activity. The team evaluated pre-intervention data for inactivity that was defined as no sustained 10-minute periods of moderate-to-vigorous physical activity during a week. They also assessed the relationships between inactivity and modifiable risk factors, such as motivation for physical activity, obesity, and pain. Results show that 42% of RA patients were inactive-participating in no moderate-to-vigorous physical activity periods of at least 10 minutes during a 7-day period of objective activity monitoring. Researchers ...
Because 2 in 5 adults (42%) with rheumatoid arthritis (RA) are inactive, public health initiatives need to address the lack of motivation to exercise and promote the benefits of physical activity in this population, say authors of an article published online in Arthritis Care & Research.. The researchers analyzed data on 176 patients with RA, 18 years of age or older, enrolled in a randomized controlled trial to assess the effectiveness of an intervention promoting physical activity. The team evaluated pre-intervention data for inactivity that was defined as no sustained 10-minute periods of moderate-to-vigorous physical activity during a week. They also assessed the relationships between inactivity and modifiable risk factors, such as motivation for physical activity, obesity, and pain. Results show that 42% of RA patients were inactive-participating in no moderate-to-vigorous physical activity periods of at least 10 minutes during a 7-day period of objective activity monitoring. Researchers ...
In 2011, I met Aaron Koblin from Google Creative Lab at OFFF in Barcelona. We promised ourselves that we would work together one day. Last fall, Aaron and I started to ping pong some ideas. We were quite excited about the potential of connecting devices through web sockets. From the very beginning, we knew that we wanted to explore that notion of connection in storytelling. My genius developer, Édouard Lanctôt-Benoit, had the idea of displaying a tracker on the phone and use camera vision from the computer to track it. We pair this information with the mobile gyroscope and accelerometer data sent through network. This setup would allow us to know accurately where in the space we hold the phone and how we handle it. I didnt wanted to transform the phone into a remote control or a game pad though. I thought it could be more interesting if the phone became a source of light. Give the illusion that we have a small video projector in our hand, beaming images on the computer screen surface. There ...
Percentage of patients with diagnosed gastrointestinal cancer who showed daily compliance using activity monitors and tablet computers to measure physical activity ...
Background: Aspects of physical functioning, including balance and gait, are affected after surgery for lower limb musculoskeletal tumors. These are not routinely measured but likely are related to how well patients function after resection or amputation for a bone or soft tissue sarcoma. Small, inexpensive portable accelerometers are available that might be clinically useful to assess balance and gait in these patients, but they have not been well studied.. Questions/purposes: In patients treated for lower extremity musculoskeletal tumors, we asked: (1) Are accelerometer-based body-worn monitor assessments of balance, gait, and timed up and go tests (TUG) feasible and acceptable? (2) Do these accelerometer-based body-worn monitor assessments produce clinically useful data (face validity), distinguish between patients and controls (discriminant validity), reflect findings obtained using existing clinical measures (convergent validity) and standard manual techniques in clinic (concurrent ...
Physical activity is a cornerstone in the prevention and treatment of obesity. There are relatively few studies that explore the effect of accelerometer-determined moderate-to-vigorous physical activity (MVPA) on neck circumference (NC), most of them confined to single high-income countries. The present study investigated the association of accelerometer-determined MVPA with NC in adolescents and adults from eight Latin American countries, which are mostly upper-middle income countries. The sample consisted of 2370 participants (47.8% male) from the Latin American Study of Nutrition and Health, a multicenter cross-sectional nutrition and health surveillance study of a nationally representative sample from eight Latin American countries (Argentina, Brazil, Chile, Colombia, Costa Rica, Ecuador, Peru, and Venezuela). Times (min/day) in MVPA (defined as time accumulated at ≥1952 activity counts/min) was assessed by ActiGraph GT3X+ accelerometer over 7 days. NC for adolescent was categorized as abnormal if
TY - JOUR. T1 - International study of objectively measured physical activity and sedentary time with body mass index and obesity: IPEN adult study. AU - Van Dyck, Delfien. AU - Cerin, Ester. AU - De Bourdeaudhuij, Ilse. AU - Hinckson, Erica A.. AU - Reis, Rodrigo S.. AU - DAVEY, Rachel. AU - Sarmiento, Olga L.. AU - Mitáš, Josef. AU - Troelsen, Jens. AU - MacFarlane, Duncan J.. AU - Salvo, Deborah. AU - Aguinaga-Ontoso, Ines. AU - Owen, Neville. AU - Cain, Kelli L.. AU - Sallis, James F.. PY - 2015. Y1 - 2015. N2 - BACKGROUND: Physical activity (PA) has been consistently implicated in the etiology of obesity, whereas recent evidence on the importance of sedentary time remains inconsistent. Understanding of dose-response associations of PA and sedentary time with overweight and obesity in adults can be improved with large-scale studies using objective measures of PA and sedentary time. The purpose of this study was to examine the strength, direction and shape of dose-response associations of ...
This cross-sectional study is one of the first to examine and compare the independent associations of objectively measured sedentary time, moderate to vigorous physical activity (MVPA) and fitness with cardio-metabolic risk factors. We studied 543 men and women (aged 18-49 years) from the NHANES 2003-2004 survey. Sedentary time and MVPA were measured by accelerometry. Fitness was assessed with a submaximal treadmill test. Cardio-metabolic risk factors included: waist circumference (WC), BMI, blood pressure, fasting glucose, HDL- and non HDL cholesterol, triglycerides (TG), and C-reactive protein (CRP). Sedentary time, MVPA and fitness were used as predictors for the cardio-metabolic outcomes in a multiple regression analysis. Standardized regression coefficients were computed. Results show that sedentary time was associated with HDL-cholesterol (β = −0.080, p = 0.05) and TG (β = 0.080, p = 0.03). These results became non-significant after adjustment for MVPA and fitness. MVPA was associated with WC
Obesity treatment and prevention in youth is challenging. Thus, we are developing the KNOWME Network, a suite of wearable, Bluetooth-enabled wireless devices for monitoring obesity-related behaviors in minority youth. Here we present the Bluetooth-enabled Accelerometer (BEA), developed to address a lack of Bluetooth-enabled, research-quality accelerometers. The BEA provides information about body movement and orientation using an accelerometer and gyroscope combination that interfaces directly with a mobile phone/computer in real time. The accuracy of BEA-based models was assessed by estimating walking speed. Purpose: To develop personalized models for estimating treadmill walking speed using the BEA. Methods: Five subjects (4 male, 1 female; age 35 ± 12) walked at 7 speeds ranging from 2.5 to 4.0 miles per hour (mph) for 5 minutes per speed while wearing the BEA on the right hip. The BEA recorded motion information with a tri-axial accelerometer and tri-axial gyroscope and transmitted it via ...
Accelerometry: A new approach to real-world outcome measures in rehabilitation. Constraint-Induced (CI) Movement Therapy," is a new treatment for chronic upper extremity hemiparesis. It has been cited by the Chair of a committee convened by NIH to assess the effectiveness of treatments in physical neurorehabilitation as one of the few modalities for which there is sound evidence of successful transfer of therapeutic effect from the clinic to the life situation." Traditional instruments in physical rehabilitation, however, do not provide a direct measure of motor function in the home. Therefore, it was necessary that this laboratory, which develops and evaluates new CI Therapy techniques, develop new methods for assessing "real-world" motor outcomes. The development of cognitive rehabilitation techniques also demand innovations in measurement, since treatment adherence and effect are best evaluated by direct, continuous, and objective measures of cognitive function in the home. Current ...
Quantifying the behavior of motile, free-ranging animals is difficult. The accelerometry technique offers a method for recording behaviors but interpretation of the data is not straightforward. To date, analysis of such data has either involved subjective, study-specific assignments of behavior to acceleration data or the use of complex analyses based on machine learning. Here, we present a method for automatically classifying acceleration data to represent discrete, coarse-scale behaviors. The method centers on examining the shape of histograms of basic metrics readily derived from acceleration data to objectively determine threshold values by which to separate behaviors. Through application of this method to data collected on two distinct species with greatly differing behavioral repertoires, kittiwakes, and humans, the accuracy of this approach is demonstrated to be very high, comparable to that reported for other automated approaches already published. The method presented offers an ...
Administrative Coordinating Center, University of Florida, Gainesville, FL: Marco Pahor, MD-Principal Investigator of the LIFE Study; Jack M. Guralnik, MD, PhD-Co‐Investigator of the LIFE study (University of Maryland School of Medicine, Baltimore, MD); Christiaan Leeuwenburgh, PhD; Connie Caudle; Lauren Crump, MPH; Latonia Holmes; Jocelyn Lee, PhD; Ching‐ju Lu, MPH.. Data Management, Analysis and Quality Control Center, Wake Forest University, Winston Salem, NC: Michael E. Miller, PhD-DMAQC Principal Investigator; Mark A. Espeland, PhD-DMAQC Co‐Investigator; Walter T. Ambrosius, PhD; William Applegate, MD; Daniel P. Beavers, PhD, MS; Robert P. Byington, PhD, MPH, FAHA; Delilah Cook, CCRP; Curt D. Furberg, MD, PhD; Lea N. Harvin, BS; Leora Henkin, MPH, Med; John Hepler, MA; Fang‐Chi Hsu, PhD; Laura Lovato, MS; Wesley Roberson, BSBA; Julia Rushing, BSPH, MStat; Scott Rushing, BS; Cynthia L. Stowe, MPM; Michael P. Walkup, MS; Don Hire, BS; W. Jack Rejeski, PhD; Jeffrey A. Katula, PhD, MA; ...
To be able to curb the global pandemic of physical inactivity and the associated 5.3 million deaths per year, we need to understand the basic principles that govern physical activity. However, there is a lack of large-scale measurements of physical activity patterns across free-living populations worldwide. Here we leverage the wide usage of smartphones with built-in accelerometry to measure physical activity at the global scale. We study a dataset consisting of 68 million days of physical activity for 717,527 people, giving us a window into activity in 111 countries across the globe. We find inequality in how activity is distributed within countries and that this inequality is a better predictor of obesity prevalence in the population than average activity volume. Reduced activity in females contributes to a large portion of the observed activity inequality. Aspects of the built environment, such as the walkability of a city, are associated with a smaller gender gap in activity and lower ...
Publishing in Annals of Internal Medicine, researchers looked at sedentary behaviour and reported that increased sedentary behaviour, both in total volume and prolonged uninterrupted bouts, was associated with increased risk of death.. Dr Amitava Banerjee, Senior Clinical Lecturer in Clinical Data Science and Honorary Consultant Cardiologist, UCL, said: "This large-scale US study in nearly 8000 individuals over the age of 45 years measured physical activity using accelerometers which is much more objective than self-report. There were three main findings. First, inactivity or "sedentary behaviour" made up most of the waking day: 12.3 out of 16 hours. Second, the total time spent inactive as well as the average duration of each period of inactivity were both associated with a higher risk of all-cause mortality. Third, the increased risk of mortality associated with sedentary behaviour was lower in those individuals who kept sedentary periods to less than 30 minutes.. "This is an observational ...
The SenseWear armband monitor utilizes multiple heat detecting sensors in addition to a tri-axial accelerometer to assess physical activity, which considerably enhances its accuracy in comparison to other commonly used monitors. We have tested varying functions of the SenseWear armband relative to the doubly-labelled method, portable indirect calorimetry system, etc. The Sensewear was widely accepted as perhaps the most valid research grade tool. While it is no longer commercially available, our lab still uses it in studies as a de-facto "alloyed standard" for comparisons with other monitors and assessments. ...
There are currently no studies available reporting intervention effects on breaking up childrens sedentary time. This study examined the UP4FUN intervention effect on objectively measured number of breaks in sedentary time, number of sedentary bouts (, 10 mins) and total and average amount of time spent in those sedentary bouts among 10- to 12-year-old Belgian children. The total sample included 354 children (mean age: 10.9 ± 0.7 years; 59% girls) with valid ActiGraph accelerometer data at pre- and posttest. Only few and small intervention effects were found, namely on total time spent in sedentary bouts immediately after school hours (4-6PM; β = -3.51mins) and on average time spent in sedentary bouts before school hours (6-8.30AM; β = -4.83mins) and immediately after school hours in favor of children from intervention schools (β = -2.71mins). Unexpectedly, girls from intervention schools decreased the number of breaks during school hours (8.30AM-4PM; β = -23.45breaks) and increased the ...
Bourke, A.K. and van de Ven, P. and Gamble, M. and OConnor, R. and Murphy, K. and Bogan, E. and McQuade, E. and Finucane, P. and \OLaighin, G. and Nelson, J. (2010) Assessment of waist-worn tri-axial accelerometer based fall-detection algorithms using continuous unsupervised activities Engineering in Medicine and Biology Society (EMBC), 2010 Annual International Conference of the IEEE , pp.2782-2785 [Details] ...
RESULTS: In total, 789 women were randomised (n = 394 PA, n = 395 control). Four were excluded post randomisation (two had been enrolled twice in sequential pregnancies and two were ineligible and randomised erroneously). The intention-to-treat analysis comprised 785 participants (n = 392 PA, n = 393 control). There was no significant difference in the rate of abstinence at the end of pregnancy between the PA group (7.7%) and the control group (6.4%) [odds ratio for PA group abstinence 1.21, 95% confidence interval (CI) 0.70 to 2.10]. For the PA group compared with the control group, there was a 33% (95% CI 14% to 56%), 28% (95% CI 7% to 52%) and 36% (95% CI 12% to 65%) significantly greater increase in self-reported minutes of moderate- and vigorous-intensity PA from baseline to 1 week, 4 weeks and 6 weeks respectively. Accelerometer data showed that there was no significant difference in PA levels between the groups. There were no significant differences between the groups for change in ...
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Structures and architectures for gyroscopes, accelerometers, micro strain gauges for direct application to rigid structures e.g., steel, and levitated MEMS ...
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Human movement analysis is a field of wide interest since it enables the assessment of a large variety of variables related to quality of life. Human movement can be accurately evaluated through Inertial Measurement Units (IMU), which are wearable and comfortable devices with long battery life. The IMUs movement signals might be, on the one hand, stored in a digital support, in which an analysis is performed a posteriori. On the other hand, the signal analysis might take place in the same IMU at the same time as the signal acquisition through online classifiers. The new sensor system presented in this paper is designed for both collecting movement signals and analyzing them in real-time. This system is a flexible platform useful for collecting data via a triaxial accelerometer, a gyroscope and a magnetometer, with the possibility to incorporate other information sources in real-time. A µSD card can store all inertial data and a Bluetooth module is able to send information to other external devices
We tagged 82 lactating northern fur seals (Callorhinus ursinus) with tri-axial accelerometers and magnetometers on two eastern Bering Sea islands (Bogoslof and St. Paul) with contrasting population trajectories. Using depth data, accelerometer data and spectral analysis we classified time spent diving (30%), resting (~7%), shaking and grooming their pelage (9%), swimming in the prone position (~10%) and two types of previously undocumented rolling behavior (29%), with the remaining time (~15%) unspecified. The reason for the extensive rolling behavior is not known. We ground-truthed the accelerometry signals for shaking and grooming and rolling behaviors-and identified the acceleration signal for porpoising-by filming tagged northern fur seals in captivity. Speeds from GPS interpolated data indicated that animals traveled fastest while in the prone position, suggesting that this behavior is indicative of destination-based swimming. Very little difference was found in the percentages of time spent in the
Those were some gestures that I thought were useful to use - due to lack of imagination for short gestures. If anyone can think to some short gestures, please tell me how these short gestures should look like, and Ill create them. Were not constraint to use those gestures, not at all. Paul On Mon, Aug 11, 2008 at 2:53 PM, Ross Woodruff ,rossw1991 at googlemail.com,wrote: , Dont have my freerunner yet but that really is a great bit of work, keep , it up, can see this being really useful, only criticism some of the , gestures seems to be a little, well, over the top, I mean, if I was on , the bus and I started doing the Z shape for example people would think , what I was upto, do the gestures have to the this exagerated or was that , just for the demo so people could clearly see what you were doing? , , Paul-Valentin Borza wrote: , , Hi, , , , , As Google Summer of Code 2008 is almost at its end, heres a video , , showing what you should expect out of the accelerometer-based gestures , , ...
The aim of this study was to investigate the effect of a 10-week family focused Active Play intervention on childrens weekday and weekend day sedentary time and total physical activity. Secondary objectives were to investigate the influence of specific confounding variables on childrens weekday and weekend day sedentary time and total physical activity.. Compared with an age-matched comparison group, a family focused intervention delivered in childrens centres located in areas of high deprivation resulted in a positive significant intervention effect on childrens sedentary time and total physical activity assessed using accelerometry for weekday and weekend day. The presence of a significant intervention effect on childrens sedentary time and physical activity are similar to the findings from other empirical family focused studies, which have demonstrated significant increases in physical activity levels [65-67]. Furthermore these results suggest that children in the intervention group ...
Contents of the 15 Chapter for This High Performance Inertial Sensors Market Study:-. Chapter 1: to describe Global High Performance Inertial Sensors Market Introduction, product scope, market overview, market opportunities, market risk, market driving force;. Chapter 2: to analyze the top manufacturers of Global High Performance Inertial Sensors Market, with sales, revenue, and price of Global High Performance Inertial Sensors Market, in 2016 and 2017;. Chapter 3: to display the competitive situation among the top manufacturers, with sales, revenue and market share in 2016 and 2017;. Chapter 4: to show the Global High Performance Inertial Sensors market by regions, with sales, revenue and market share of Global High Performance Inertial Sensors Market, for each region, from 2012 to 2017;. Chapter 5, 6, 7, 8 and 9: to analyze the key regions, with sales, revenue and market share by key countries in these regions;. Chapter 10 and 11: to show the market by type and application, with sales market ...
And finally, a really cool study by Watson (3) that analyzed hand motion patterns using an inertial measurement unit. The author looked at 14 surgical attendings and 10 first- and second-year surgical residents. They were asked to do a simulated surgical procedure while wearing an inertial measurement unit on their dominant hand. They used the pattern of movements to train a classification algorithm with expert and novice patterns. The classification algorithm (which is similar to an artificial neural network) is good at identifying patterns. In this case, when the authors gave the classification algorithm blinded hand motion patterns, it did a pretty good job of classifying them as expert or novice. Its accuracy was 83%, with a sensitivity of 86% and specificity of 80%. The classification algorithm was able to reliably classify surgical hand motion patterns as expert or novice. This could be used in the future to make an objective assessment of procedural or surgical proficiency ...
This study will use a two-arm randomized control trial (RCT) design to examine the effect of a home-based exercise training program versus a minimal exercise, attention control condition on markers of subclinical atherosclerosis and mobility disability in persons with MS. The primary outcomes will be subclinical atherosclerosis including measures of arterial structure and function and measures of mobility disability including the six-minute walk and timed 25-foot walk, GaitRite walking assessment and one week of accelerometry data.. Fifty-four persons with MS who have an Expanded Disability Status Score (EDSS) score between 0 and 4.0 will be randomized into either the home-based exercise training condition or the attention control condition. Participation in this study will include a 3-month exercise program to be completed at home. In addition, participants will need to come to University of Illinois at Chicago (UIC) three times to undergo testing. Each visit will take about 3-4 hours to ...
A portable distance tracking device calculates the distance to a flag from a first position on a hole of a golf course. An initialization means initializes the device at the start of play. The device includes two rotational accelerometers, to measure acceleration along pitch and roll axes, and a translational accelerometer, to measure acceleration along a surge axis. A microprocessor, including an A-D converter, (i) converts the accelerations to digital data and (ii) integrates the data twice, over time, to determine distance traveled on the hole. The microprocessor further compensates the data for forces due to at least one of gravity, centripetal acceleration, and a rotation of earth, and thereafter determines the distance to the flag as a function of the distance traveled. A keypad input device provides for selecting the initialization and for selecting the hole in play. A memory element stores a digital representation of the hole; and a display unit displays the distance to the flag.
Janney, C., Richardson, C., Hollerman, R., Glasheen, C., Strath, S., Conroy, M., & Kriska, A. (2008). Gender, mental health service use and objectively measured physical activity: Data from the National Health and Nutrition Examination Survey (NHANES 2003-2004). Mental Health and Physical Activity, 1(1), 9 - 16 ...
In order to evaluate potential risks of whole-body vibration (WBV) training, it is important to understand the transfer of vibrations from the WBV platform to the muscles. Therefore, the purpose of this study was to quantify the transmissibility of vibrations from the WBV platform to the triceps surae and quadriceps soft tissue compartments. Sixteen healthy, male participants were exposed to side-altering WBV at 2.5mm amplitude and frequencies of 10, 17 and 28Hz. Acceleration signals were measured at the platform and at the soft tissue compartments using tri-axial accelerometers. Transmissibility of peak acceleration and peak amplitude for both tested soft tissue compartments was high at 10Hz (2.1-2.3), moderate at 17Hz (1.1-1.9) and low at 28Hz (0.5-1.2). The average peak acceleration was 125.4ms(-2) and 46.5ms(-2) for the triceps surae and quadriceps at 28Hz, respectively. The muscles" vibration frequency was equal to the input frequency of the WBV platform (p,0.05). The transfer of vibrations ...
Collings, P., Wijndaele, K. L., Corder, K. L., Westgate, K. L., Ridgway, C., Sharp, S. J., Atkin, A. J., et al. (2015). Objectively measured physical activity and longitudinal changes in adolescent body fatness: an observational cohort study. Pediatric Obesity https://doi.org/10.1111/ijpo.12031 ...
Thanks, didnt know that. Ill definitely try it out. Thanks, Paul On Thu, Aug 14, 2008 at 7:55 PM, Harald Koenig , koenig at tat.physik.uni-tuebingen.de, wrote: , Hi Paul, , , On Aug 14, Paul-Valentin Borza wrote: , , , Theres a quick way to install it, and a more detailed way... Read , , http://wiki.openmoko.org/wiki/Gestures , , really nice work! , a quick hint how to start from ssh login, just use , , DISPLAY=:0 /etc/init.d/gesl start , , instead of , , /etc/init.d/gesl start , , , Harald , -- , I hope to die ___ _____ , before I *have* to use Microsoft Word., 0--,, /OOOOOOO\ , Donald E. Knuth, 02-Oct-2001 in Tuebingen. ,_/ / /OOOOOOOOOOO\ , \ \/OOOOOOOOOOOOOOO\ , \ OOOOOOOOOOOOOOOOO,// , \/\/\/\/\/\/\/\/\/ , Harald Koenig // / \\ \ , koenig at tat.physik.uni-tuebingen.de ^^^^^ ^^^^^ , -- http://www.borza.ro -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.openmoko.org/pipermail/community/attachments/20080814/c5cd53b1/attachment.htm ...
Purpose: Study purposes were to develop energy expenditure (EE) prediction models from raw accelerometer data and to investigate the performance of three different accelerometers on five different wear positions in preschoolers. Methods: Fourty-one children (54% boys; 3-6.3 years) wore two Actigraph GT3X (left and right hip), three GENEActiv (right hip, left and right wrist), and one activPAL (right thigh) while completing a semi-structured protocol of 10 age-appropriate activities. Participants wore a portable indirect calorimeter to estimate EE. Utilized models to estimate EE included a linear model (LM), a mixed linear model (MLM), a random forest model (RF), and an artificial neural network model (ANN). For each accelerometer, model, and wear position, we assessed prediction accuracy via leave-one-out cross-validation and calculated the root-mean-squared-error (RMSE). Results: Mean RMSE ranged from 2.56-2.76 kJ/min for the RF, 2.72-3.08 kJ/min for the ANN, 2.83-2.94 kJ/min for the LM, and ...
Using NHANES data, the relationship between objectively measured sedentary time and metabolic syndrome was examined in a representative sample of older adults living in the U.S. Compared with people without metabolic syndrome, people with metabolic syndrome spent more hours and a greater percentage of their wear time as sedentary. Further, people with metabolic syndrome had a longer average sedentary bout, a lower intensity during sedentary time, and fewer breaks in sedentary time. A higher percentage of total wear time spent as sedentary time was associated with a significantly greater likelihood of metabolic syndrome even after adjustment for physical activity. Additionally, fewer sedentary breaks were associated with a higher likelihood of metabolic syndrome, and a significant trend was found for intensity during sedentary time where the likelihood of metabolic syndrome increased with a decrease in intensity.. Previous research with self-reported data is consistent with the findings in this ...
Background We have a limited understanding of the effects of age-related macular degeneration (AMD) on physical activity (PA), and we have no prevalence estimates of the daily movement patterns among Americans with AMD. Therefore, we examined the association between AMD and PA and provided estimates of the daily movement patterns of Americans with AMD. Methods Data from the 2005-2006 National Health and Nutrition Examination Survey were used, including 1,656 adults (40-85 yrs). Retinal imaging was performed to classify individuals as no AMD, early AMD, or late AMD. Participants wore an ActiGraph 7164 accelerometer for 7 days to measure PA behavior. Results 93.2% of participants with late AMD were in the least desirable group (not sufficiently active and having a negative light intensity-sedentary behavior balance). After adjustments (including age), participants with late AMD, as compared to those with no AMD, engaged in 50% less moderate-to-vigorous physical activity (MVPA) (RR = 0.50; 95% CI: 0.28
Until recently, inertial measurement units (IMUs) traditionally have been associated with military uses (for high-end IMUs) or consumer products (for low-end IMUs) but the marketplace has lacked an IMU that balances high performance and cost sensitivity for industrial applications. The S4E5A0A0 represents a new category of IMU, offering a combination of high accuracy, small size, and low power consumption.
A major motivation for Lie group observers is their application as sensor fusion algorithms for an inertial measurement unit which can be used to estimate the orientation of a rigid-body. In the first part of this thesis ...
Commercial systems utilizing data from inertial measurement units (IMUs) to analyse movement patterns have not yet been adapted to monitor daily training in cross-country (XC) skiing. The main purposes of this study are to investigate: (1) the feasibility and potential of a multi-sensor system consi.... ...
This work focuses on the multi-objective optimization of a compliant-mechanism accelerometer. The design objective is to maximize the sensitivity of the accelerometer in its sensing direction, while minimizing its sensitivity in all other directions. In addition, this work proposes a novel compliant hinge intended to reduce the stress concentration in compliant mechanisms. The paper starts with a brief description of the new compliant hinge, the Lamé-shaped hinge, followed by the formulation of the aposteriori multi-objective optimization of the compliant accelerometer. By using the normalized constrained method, an even distribution of the Pareto frontier is found. The paper also provides several optimum solutions on a Pareto plot, as well as the CAD model of the selected solution.. ...
Just throwing this question out there for all you ...... Do you think that my decrease in wafer wear time could be from one of the things I drink on a daily basis? I mix cranberry/black cherry juice and water (1/3 juice, 2/3 water). I usually drink 4-6 bottles of it a day, depending on my activity, along with my other "drinks" throughout the day. I think I began drinking this juice mix about 6 months ago or so.... hmmmmmm maybe? I sure hope not - I love the stuff, and I mix it pretty weak, just for flavor. And, some nutritional value as well ...
And the bar is pretty low for what constitutes light physical activity, researchers say. It can mean sauntering through a mall window-shopping instead of ordering online, fishing along a riverbank, or ballroom dancing.. In other words, casting a spinner or spinning on the dance floor can help offset our sedentary ways.. The problem, the authors say, is that nearly half of Americans surveyed did not engage in a sufficient amount of moderate-to-vigorous physical activity (more than 150 minutes a week) and, in fact, spent more time in sedentary mode than even doing light physical activity.. "Thats actually rather frightening," said Bradley Cardinal, co-director of the Sport and Exercise Psychology Program at Oregon State University and co-author on the study. "About half of the people in this country are incredibly sedentary - basically, couch potatoes. And that can have some very negative effects on ones health.". Results of the study have been published online in the journal Preventive ...
To handle motion data by periodic sampling, the app calls a "start" method taking no arguments and periodically accesses the motion data held by a property for a given type of motion data. This approach is the recommended approach for apps such as games. Handling accelerometer data in a block introduces additional overhead, and most game apps are interested only the latest sample of motion data when they render a frame.. ...
Rugged in design, the Models 3801A and 4801A are ready for steady state and transient measurement applications in harsh environments. Compact and hermetically sealed, the components integrate gas-damped MEMS sensing elements with a wide frequency response. Available in ranges from ±2g to ±2000g, the accelerometers are suitable for both low-level and high-end transient shock measurements. Internal over-range stops provide shock protection to over 10,000g, reportedly without affecting calibration. The Model 3801A provides a mV-output signal for shock pulse measurements while the Model 4801A delivers a signal-conditioned, amplified output for low level measurements. A custom ASIC in Model 4801A provides temperature compensation over a range from -55°C to 125°C. Both accelerometers install with a 10-32 stud mounting and a five-pin, side-mount connector. For more information, call MEASUREMENT SPECIALTIES INC., Hampton VA. (800) 745-8008.. ...
For every additional 30 min each day men spend in moderate-to-vigorous physical activity, their odds of developing erectile dysfunction dropped 43 per cent.
A two degree of freedom (2 DOF) accelerometer comprising two imbalanced sensing modules (i.e., bar modules having an unbalance) is provided such that two sensing modules are located in the plane to be measured. The two imbalanced sensing modules have force balance and are used to measure linear and angular accelerations in two degrees of freedom. A single modular design is used for both of the axes. Each of the two individual sensing modules has a housing containing a proof mass for each measured output and a support of the proof mass with the support optimized for the sensitive axis selected for sensor output and having high rigidity in all other axes of the support. Also provided is electrostatic servo force balance technology. A proportional-integral-derivative (PID) controller is used to obtain a closed loop bandwidth of 1 kHz and a steady state error of zero for full scale accelerations up to 75 gs and 1000 rad/sec2.
Find high quality accelerometers, vibration sensors, cables, connectors and more, for industrial monitoring and maintenance -- unconditional lifetime warranty.
Find high quality accelerometers, vibration sensors, cables, connectors and more, for industrial monitoring and maintenance -- unconditional lifetime warranty.
If a decision not to use a permanently mounted accelerometer has been made - it is of high importance to select a flat surface to press the accelerometer against. To ensure consistency in the data, measurements should be taken at the same precise location for comparison (moving the accelerometer only a few inches can produce drastically different vibration readings). Mark the measurement point with a permanent-ink marker to ensure that the measurements are taken at the exact location every time ...
Many surveying engineering applications require the knowledge of the orientation parameters of instruments. One can use inertial measurement units (IMUs) to determine that. IMUs are combinations of several inertial sensors and comprise at least an accelerometer and a gyroscope. Therefore, they can detect accelerations and angular rates in a three-dimensional space. As micro-electro-mechanical systems, the sensors are increasingly getting smaller and lighter, but without being reduced in their accuracy. The smaller size facilitates diverse placing of the sensors, which allows a variety of uses. Moreover, several low-cost IMUs have been devised since the development of single-board computers.. The main objectives of this work are to determine tilts using a low-cost IMU, and the accuracy of the sensor. Furthermore, it studies general IMU applications in surveying engineering, and examines whether low-cost versions are applicable.. To fulfil the objectives, the study was based on a selected low-cost ...
The current study examined objectively measured physical activity data collected on a nationally representative sample of U.S. adults and thus provided a unique opportunity to investigate total physical activity and various levels of physical activity intensity across racial/ethnic and sex groups. The most striking findings were the relatively higher amounts of physical activity among Hispanic men and women compared to their male and female counterparts.. This current effort indentified a pattern of higher physical activity levels in Hispanic men compared to white and black men. The results also indicate that Hispanic women engage in more light physical activity compared to their white and black counterparts. This is in contrast to previous results from national surveys, which have indicated that Hispanic men and women are less active compared to their white and black counterparts. Results from the 1994-2004 BRFSS showed that Hispanic men and women reported greater amounts of inactivity than ...
0040] In DDR-type scenarios or other game scenarios, the player will wear, at judicially selected positions (below or above the shoe, ankle, wrist, etc.), a device 200 of the type of that represented in FIG. 2a which is a MotionPod®, although all the possibilities offered by a device of this type are not fully exploited in the embodiments envisaged in the context of the present invention. A MotionPod which, as such, is a prior art device, comprises an accelerometer 210 and a magnetometer 230. The two sensors are tri-axial. A mono- or bi-axial accelerometer may suffice in certain application cases (DDR in which all the cells provided to perform dance steps are situated in a single direction), one axis being used to detect the displacement, a second possible axis being used to detect the start of a motion. However, in most cases, a tri-axial accelerometer will be necessary to determine the direction of movement. A magnetometer can be used in combination with the accelerometer, notably to ...
This study assessed associations between preschoolers objectively measured leisure-time PA and a comprehensive set of subjective (i.e. by parent proxy-report) and objective potential PA correlates across the behavioral, social and physical environmental domains on both family- and community-level (Fig. 1) in a large sample of German preschoolers.. None of the objective community-level social and physical environmental potential correlates were associated with objectively assessed leisure-time PA. In contrast, for the family-level behavioral domain (child participation in organized sports) as well as the subjective (i.e. by parent proxy-report) family-level physical environmental domain (parental perception of neighborhood traffic safety) significant associations with MVPA and TPA were observed. These main findings were consistently seen in both the weekend and weekday afternoon samples.. No associations between PA and the objective community-level social and physical environmental factors from ...
An improved sensor and related method for multi-axial measurement of motion for an implantable medical device is disclosed. The sensor has a wide variety of applications, including use as a cardiac wall motion sensor or a physical activity sensor. The sensor includes first and second conductors over which the motion measurements are made. A first transducer provides a first motion measurement indicative of sensor acceleration during a first phase, while a second transducer provides a second motion measurement indicative of sensor acceleration during a second phase. The first and second transducers are connected in parallel so as to provide the first and second motion measurements to an implantable medical device over the first and second conductors. The first and second phases are non-overlapping periods of time so that the motion measurements from each transducer are time division multiplexed. The sensor provides motion measurements that may either be compensated or uncompensated for temperature
Background: Physical activity for persons with Parkinson Disease (PD) is recommended yet little is known about the physical activity levels in this patient population. The primary aim was to assess the feasibility of using a direct measurement and self-report measure of physical activity in patients with PD. Methods: Physical activity was recorded in 11 out-patients with mild to moderate PD. An accelerometer based sensor system (SenseWear Pro Armband?) which was worn continuously over 2 days was used to measure physical activity. Minute by minute energy expenditure and steps per day were recorded. Self-report physical activity was measured using the Short QUestionnaire to ASsess Health-enhancing physical activity (SQUASH) which assessed average weekly activity. Results: Using the accelerometer based sensor system, 83% of the day was spent in sedentary activity with the majority active time spent at a light intensity (2.7 [SD 2.0] hrs/day). Self-reported mean number of hours for activities greater than 2
Background: While socio-economic status has been shown to be an important determinant of health and physical activity in adults, results for children and adolescents are less consistent. The purpose of this study, therefore, is to examine whether physical activity and sedentary behavior differs in children by socio-economic status (SES) independent of body mass index. Methods: Data were from two cohorts including 271 children (117 males; 154 females) in study 1 and 131 children in study 2 (63 males; 68 females). The average age was 9.6 and 8.8 years respectively. Height and body mass were assessed according to standard procedures and body mass index (BMI, kg/m2) was calculated. Parent-reported household income was used to determine SES. Habitual, free-living physical activity (PA) was assessed by a pedometer (steps/day) in study 1 and accelerometer (time spent in moderate-to-vigorous PA) in study 2. Self-reported time spent watching TV and on the computer was used as measure of sedentary ...
Nixon, Catherine, Moore, H J, Lake, A A, Douthwaite, W, OMalley, C L, Pedley, C L, Summerbell, C D and Rourten, A C The enviroment can explain differences in adolescents daily physical activity levels living in a deprived urban area: Cross-sectional study using accelerometry, GPS and focus groups. Journal of Physical Activity and Health. ISSN 1543-3080 (In Press) Full text not available from this repository ...
Inadequate sleep in early childhood is associated with multiple consequences such as attention difficulties, cognitive disruptions, poor school performance and mood disturbances [1]. In recent years, sleep curtailment has also gained attention as a potential contributor to the obesity epidemic in both adults and children [2-5]. Despite a growing body of evidence demonstrating an association between short sleep duration and current and future obesity in children aged 0-16 years [3, 6-11], the causal relationship is still unclear. It is not known whether sleep loss affects the risk of obesity directly, through changes in function and levels of metabolic hormones such as glucagon-like peptide-1 [12] resulting in increased food intake, or if common behavioral or environmental factors such as hypo- or hyperactivity [13] and other types of stressors are involved, causing both sleep and weight disturbances [14, 15]. However, few studies have included both assessments of physical activity intensity and ...
Quantifying activity patterns and energy budgets among animal species is essential for the assessment and identification of basic life-history traits, habitat requirements and intra- and inter-specific interactions. Such information is also essential for parameterising ecosystem models and for advancing the informed management of commercially and recreationally valued fish species. Field observations of the behaviour and locomotion of aquatic animals in the wild are typically challenging, though micro-accelerometer (archival or acoustic and satellite telemetry) tags now provide the means to remotely monitor animals in the wild.. Accelerometer data can be used to quantify behavioural states and rates and to estimate energy expenditure in the field (Tsuda et al., 2006; Sato et al., 2007, Murchie et al., 2010; Payne et al., 2011; Whitney et al., 2010). In fish, acceleration metrics have been linked to heart rate and energy expenditure (Clark et al., 2010), spawning behaviour (Tsuda et al., 2006), ...
The Finnish Geospatial Research Institute FGI is testing future GNSS navigation methods this week on board the research vessel Aranda of the Finnish Environment Institute. Staff of the geodesy and geodynamics department and of the navigation and positioning department have installed a range of GNSS receivers and antennas as well as an inertial measurement unit on board the research vessel. The instruments will continuously track the vessels position and attitude while the Aranda sails through different parts of the Baltic Sea according to its own research program.. The purpose of the study is to test the application of a future GNSS augmentation service for navigation at sea. In addition, the precision navigation data will be used to check the quality of the vertical datum (geoid) in the Baltic Sea.. The work is part of a larger project FAMOS Odin (Finalising Surveys for the Baltic Motorways of the Seas). The project is co-funded by the European Union under the Connecting Europe Facility and it ...
Deep sea sediment corer manufacturers Ocean Scientific International Ltd (OSIL) have released a convenient accessory for their Giant Piston Corer, an accelerometer, which should aid operators with deployments.. The accelerometer can calculate the attitude of the corer head on penetration of the corer into the seabed, and the penetration rate of the barrel string, which will assist operators with multiple deployments in the same location. The accelerometer is housed in anodised aluminium canister that is rated to full ocean depth.. The Giant Piston Corer from OSIL can achieve up to 60m core samples in soft cohesive sediments and muds. The system is a modular construction with an integral piston, which, according to OSIL, reduces internal friction and prevents plugging.. ...
FRIDAY, Nov. 8, 2019 (HealthDay News) - Older adults who increase their frequency of moderate-to-vigorous physical activity (MVPA) have a significantly lower risk for cardiovascular disease (CVD) compared with those who are continuously physically inactive, according to a study published online Nov. 7 in the European Heart Journal.. Kyuwoong Kim, from the Seoul National University Graduate School in South Korea, and colleagues examined the correlation between changes in MVPA and CVD in a nationwide cohort study of older adults aged 60 years and older. The risk for CVD was assessed prospectively between 2013 and 2016 according to changes in frequency of MVPA.. The researchers found that those who increased their frequency of MVPA from physically inactive to active had a significant reduced risk for total CVD compared with those who were continuously physically inactive (engaging in physical activity one to two times per week: 0.7/1,000 person-years [PY] decrease in incidence rate [IR; adjusted ...
Presented by: Takumi Kobayashi, Author(s): Takumi Kobayashi, Koiti Hasida, Nobuyuki Otsu, National Institute of Advanced Industrial Science and Technology, Japan ...
Open peer review is a system where authors know who the reviewers are, and the reviewers know who the authors are. If the manuscript is accepted, the named reviewer reports are published alongside the article. Pre-publication versions of the article and author comments to reviewers are available by contacting [email protected] All previous versions of the manuscript and all author responses to the reviewers are also available.. You can find further information about the peer review system here.. ...
Adult women were recruited from sites across the US. Participants wore a GPS device and accelerometer on the hip for 7 days to assess location and physical activity at minute-level epochs. GPS records were linked to 250m resolution satellite-based vegetation data and Census Block Group-level EPA Smart Location Database walkability data. Minute-level generalized additive mixed models were conducted to test for associations between GPS measures and accelerometer count data, accounting for repeated measures within participant and allowing for deviations from linearity using splines. ...
To our knowledge, this is the first study to show that insulin resistance predicts the decline in physical activity and increase in sedentary behavior experienced by peripubertal minority females over a year. Each unit lower in baseline SI was associated with an extra 3.6-min mean decrease in physical activity per day as measured by accelerometry over a year, while each one unit lower in baseline SI was associated with an extra mean 8.5-min increase in sedentary behavior per day over a year, regardless of adiposity, age, pubertal stage, or ethnicity. Each unit lower in SI at baseline predicted an extra 17.8-min increase in sedentary behavior as measured by self-report. While interventions to increase physical activity in youth have shown some promise, none have been able to increase activity to recommended levels. This may be because the association between pubertal declines in SI and activity levels has been ignored in intervention approaches.. Changes in insulin resistance might affect ...
Few instruments that measure physical activity (pa) can accurately quantify pa performed at light and moderate intensities, which is particularly relevant to older adults.
The researchers in this study defined living a healthy lifestyle as meeting four parameters: being sufficiently active (150 mins of moderate-to-vigorous physical activity each week), eating a healthy diet (based on a 24-hour recall), being a nonsmoker (serum cotinine level) and having a recommended body-fat percentage (5%-20% for men, and 8%-30% for women). Researchers then examined the association between having different combinations of these characteristics and several biomarkers for cardiovascular disease. The results from the study came from a survey of 4,745 adults ...
Continuous heart rate tracking helps you see how your heart behaves during your day. Together with Polars 24/7 accelerometer-based activity tracking it gives you a complete overview of all your daily activity. With continuous heart rate tracking all activity is counted towards your daily activity goal, even the activities where your arms are not moving, such as cycling. You also get even more precise calorie burn data. Your heart rate is tracked automatically with Polars wrist-based heart rate solution.
Chronic diseases-including cancer, cardiovascular diseases, and metabolic conditions such as diabetes and obesity-account for over 60% of overall global mortality. Sedentary time increases the risk for chronic disease incidence and mortality, while moderate to vigorous physical activity is known to decrease risk. Most Americans spend at least half of their time sedentary, with a trend toward increasingly sedentary lifestyles, and few Americans achieve recommended levels of physical activity. Time spent outdoors has been associated with reduced sedentary time and increased physical activity among children/youth and the elderly, but few population-based studies have examined this relationship among working age adults who may face greater constraints on active, outdoor time ...
Columbia Research Laboratories Inc., Woodlyn, PA, offers the Model SA-120RHT force balance accelerometer capable of operating at temperatures up to 200°C under extreme shock and vibration conditions. The device was designed as a measurement while drilling (MWD) sensor for use in downhole well service applications. The self-contained sensor provides a high-level, low-impedance output, weighs 1.5 oz. max, is 1.0 in. dia. by 0.73 in. high, has an operating temperature range of -40°C to 200°C, and survives shocks of 500 G, 0.5 ms and vibrations to 25 Grms, 0.5 in. displacement D.A. (2-2000 Hz).
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The PPMS DynaCool is a completely redesigned instrument that provides all the capabilities of the Physical Property Measurement System without the need for any liquid cryogen. The system uses a single, two-stage pulse tube cryocooler for both the superconducting magnet and the temperature control system, providing an efficient, low vibration environment for sample measurements that simultaneously provides lower maintenance costs.. Measurements of material properties like specific heat, magnetic AC and DC susceptibility and both electrical and thermal transport properties (like Hall effect, thermoelectric figure of merit and Seebeck effect) can be done at down to 1.9 K and at up to 14 T.. More. ...
MultiWii 2.0 has an interesting option. You can calibrate your copter while itsflying and then set to neutral (0) the trims from your radio. First uncomment #define InflightAccCalibration to activate the option in config.h of MultiWii.. Method A: The Failsafe method (if you have an aux channel assigned to arm your copter).. ...
ActiGraph is dedicated to providing our clients with highly accurate, innovative and cost effective objective monitoring solutions to help them achieve their research and clinical data collection, analysis and management objectives.
The design and implementation of a new input switching capacitive microaccelerometer interface circuit with /spl mu/g resolution is presented. The accelero
ActiGraph is dedicated to providing our clients with highly accurate, innovative and cost effective objective monitoring solutions to help them achieve their research and clinical data collection, analysis and management objectives.
Your device may have sensors that provide information to assist in a better understanding of your location. For example, an accelerometer can be used to determine things like speed, or a gyroscope to work out direction of travel ...
Your device may have sensors that provide information to assist in a better understanding of your location. For example, an accelerometer can be used to determine things like speed, or a gyroscope to figure out direction of travel ...
We are considering various options for performing rotor bar analysis on larger horsepower motors. We would like to be able to obtain the rotating speed via accelerometer. Would then hope to perform current dB analysis using slip speed and number of motor poles versus 60 hertz current (or other if an adjustable frequency drive is controlling frequency supplied to the motor).It appears that the 4262 has enough dB range to perform the job. Any comments would be appreciated ...
It is well-known that being physically active is linked to living a longer and healthier life. A recent study from Australian researchers confirmed this, showing that taking more steps each day led to a lower risk of death. Over a period of five years the scientists studied objectively measured physical activity-with a device, and not... Adriana Selwyn and Jonathan Dugas , Mar 23, ...
Background: Mass-media campaigns such as Change4Life use messaging to promote physical activity guidelines. Raising knowledge of MVPA guidelines within UK adults is a main goal of current mass media campaigns aimed at increasing engagement in MVPA. As this may help to inform accurate perceptions of adults own MVPA level it is an important area of investigation. Subjective norms, health status and normal walking intensity may also influence adults awareness of their own MVPA behaviour. The aim of this study was to examine the hypothesis that greater knowledge of MVPA guidelines, supportive subjective norms, lower self-reported health status and intensity of typical walking pace are associated with accurate awareness of MVPA engagement within a sample of UK adults. Methods: A cross-sectional study of UK adults was conducted. UK adults who subscribed to the National Academic Mailing List Service (JISCMail) were sent an invitation to complete an online survey. 1,724 UK adults completed the online ...
Are there differences in lifestyle between people with vs. without fibromyalgia (FM)? A recent study found women with FM found spend more time engaged in sedentary behaviors and less time in physical activity. In the study, researchers followed 413 female patients with FM and 188 age-matched healthy female controls. Researchers used three different approaches to access physical activity: a triaxial accelerometer to examine sedentary time, time spent in physical activity, and step counts. They discovered those who suffered from FM spent an average of 39 more minutes per day in sedentary activity and 21 fewer minutes per day in light physical activity, 17 fewer minutes per day in moderate physical activity, and 19 fewer minutes per day in moderate-to-vigorous physical activity. In addition, those with FM took a mean of 1,881 fewer steps that those without FM. Now, this isnt really a surprise given the fact that people with FM are in pain and more likely to have difficulties sleeping and ...
Are there differences in lifestyle between people with vs. without fibromyalgia (FM)?. A recent study found women with FM found spend more time engaged in sedentary behaviors and less time in physical activity. In the study, researchers followed 413 female patients with FM and 188 age-matched healthy female controls. Researchers used three different approaches to access physical activity: a triaxial accelerometer to examine sedentary time, time spent in physical activity, and step counts.. They discovered those who suffered from FM spent an average of 39 more minutes per day in sedentary activity and 21 fewer minutes per day in light physical activity, 17 fewer minutes per day in moderate physical activity, and 19 fewer minutes per day in moderate-to-vigorous physical activity. In addition, those with FM took a mean of 1,881 fewer steps that those without FM.. Now, this isnt really a surprise given the fact that people with FM are in pain and more likely to have difficulties sleeping and ...
Purpose: Although physical activity (PA) is protective against obesity, diabetes, and several other diseases, a profound decline in PA occurs during puberty. Previous studies have shown that this pubertal decline in PA is particularly steep in Latina females. Latina females are at high risk for obesity, pre-diabetes, and diabetes type 2. Therefore, this pubertal decline in PA is detrimental to their current and future health. Research on psychosocial correlates of PA in this understudied, high-risk population is needed. ❧ Methods: Participants were 95 Latina females, with mean age of 12.1 and mean BMI percentile of 87.0%. Physical activity was measured objectively by accelerometry and subjectively by 3- Day physical activity recall (3DPAR). Measures also included body fat by air plethysmography, motivation for physical activity, and acculturation status. Regression models were used to evaluate the associations between PA and psychosocial measures, correcting for age and percent of body fat. ...
For evaluating physical function or physical activity, wearable sensors must capture kinematic or dynamic dimensions such as translational and rotational accelerations, velocities and displacements or forces and moments. Sensor measurement is captured either directly or indirectly and then further processed using additional information (e.g. boundary conditions) including those of human kinetics computer models.. The most commonly-used wearable sensors are inertial measurement units (IMUs). They contain individual or combined one-, two- or three-dimensional accelerometers and gyroscopes and have become accessible regarding measurement accuracy, size, cost, energy consumption or onboard pre-processing power through mass production, for example for automotive stability programmes and smartphones. Also magnetometers, GPS and barometer sensors are available, mostly in sensor fusion with an IMU. Wearable sensors that measure forces are yet less common and in orthopaedic publications seem restricted ...
The benefits of physical activity in youth are well documented.1-5 Regular moderate-to-vigorous physical activity (MVPA) is positively associated with musculoskeletal health, cardiovascular well-being (eg, healthy blood pressure, lipid and lipoprotein levels, cardiovascular autonomic tone), metabolic health, maintenance of a healthy weight, psychological well-being (eg, improved self-concept, reduced anxiety and depression) and reduced risk of type 2 diabetes.6 ,7 The accumulation of at least 60 min of MVPA per day is recommended for youth; however, accumulating physical activity below this threshold is still beneficial, especially for those whose health is at risk (eg, overweight or obese youth).6 Despite awareness of the well-established benefits of physical activity, rapid changes in technology and the habitual environment over the past 50 years may have caused an increase in sitting, passive travel and subsequently a reduction in incidental physical activity.8 Furthermore, over the course of ...
Looking for online definition of gyroscope in the Medical Dictionary? gyroscope explanation free. What is gyroscope? Meaning of gyroscope medical term. What does gyroscope mean?
Gareth Stratton, Professor of Paediatric Exercise Sciences at Swansea University and co-investigator on the project said: "I was delighted that Dr Mackintosh, who is a recently appointed member of staff, won top prize along with her collaborators. Dr Mackintoshs study received significant interest and reflects an area of work that we are keen to pursue at Swansea.". The CHANGE! study has initially focussed on Wigan Borough has which has a population of around 307,000 and is a Spearhead area which means it has above the UK average for deprivation in communities, type two diabetes diagnosis and early deaths from heart disease, stroke and cancer. More than 20% population are obese or very obese, while 35.2% of Year 6 boys and 31.2% of Year 6 girls are overweight or obese.. Whilst it is recommended that children should engage in 60 minutes moderate-to-vigorous physical activity every day, the CHANGE! project researched how much physical activity the children actually did. The project focused on ...
To analyse aerobic fitness and its relationship with sport participation, exercise training and habitual physical activity (HPA) during youth. Studies were located through computer searches of Medline, SPORT Discus and personal databases. Syste
The purpose of this study was to examine the physical activity patterns of older adults with intellectual disabilities (ID) in comparison with younger adults with ID and older adults without ID. A sample of 109 participants was included in the study. Sophisticated data reduction, time stamped technology, and multiple objective measures (i.e., pedometers and accelerometers) were used to determine physical activity intensities and walking patterns of participants. Results indicate that older adults with ID are performing less physical activity than comparison groups. A small proportion of older adults with ID (6%) met national physical activity recommendations of 150 min of moderate or 75 min of vigorous physical activity in bouts greater than ten minutes across the week (USDHHS, 2008). Sedentary behavior was also an observable factor in this study. These findings demonstrate the need for health promotion efforts for adults with ID across the lifespan ...
Cane toads Bufo marinus were introduced to Australia as a control agent but now have a rapidly progressing invasion front and damage new habitats they enter. Predictive models that can give expansion rates as functions of energy supply and feeding ground distribution could help to maximise control efficiency but to date no study has measured rates of field energy expenditure in an amphibian. In the present study we used the accelerometry technique to generate behavioural time budgets and, through the derivation of ODBA (overall dynamic body acceleration), to obtain estimates of energetics in free ranging cane toads. This represents the first time that accelerometers have been used to not only quantify the behaviour of animals but also assign to those behaviours rates of energy expenditure. Firstly, laboratory calibrations between ODBA and metabolic rate were obtained and used to generate a common prediction equation for the subject toads (R2 = 0.74). Furthermore, acceleration data recorded ...
Participation in physical activity has declined dramatically among U.S. youth, especially among girls. Little is known about the opportunities for increasing participation in moderate-to-vigorous physical activity (MVPA) among adolescents before school, although active commuting to school has been identified as a potential source of physical activity.. PURPOSE: To examine how travel by walking before school contributes to total physical activity of adolescent girls.. METHODS: A total of 1596 healthy 6th grade girls, age 11-12 years, were recruited from a random sample of 2160 girls from 36 schools participating in the Trial of Activity in Adolescent Girls (TAAG). Age, ethnicity, and socioeconomic status were obtained from the girls by questionnaire. Each participant wore an Actigraph accelerometer for 6 days and completed a modified version of the 3-Day Physical Activity Recall (3DPAR). Participants were classified as walkers if they reported travel by walking" before school on one or more ...
Background Excess adipose tissue and low physical activity are two major determinants for chronic diseases such as type 2 diabetes and cardiovascular disease. Understanding these relationships requires accurate and precise measures of body composition and physical activity, and most existing observational studies lack such measures. Paper I to III in this thesis addresses the validity of measures of physical activity and abdominal adipose mass. In paper IV and V, we explore the relationships between obesity and physical activity on metabolic health in non-pregnant and pregnant women and their offspring.. Methods and Results Two hundred men and women representative of the Northern Sweden EPIC cohort were recruited for Paper I. A questionnaire on physical activity (PAQ) was validated against objectively measured physical activity energy expenditure (PAEE). A categorical physical activity index (Cambridge index) calculated from PAQ showed strongest correlation with PAEE (r=0.33 p,0.05). In Paper ...
Physical inactivity during childhood is associated with the development of chronic disease, including overweight and obesity,1,2 and type 2 diabetes.3 In Australia, about 75% of Aboriginal and Torres Strait Islander people over 15 years old are considered inactive,4 57% are overweight or obese5 and the rate of diabetes is at least three times that of non-Indigenous Australians.5 Improving the health of Australias Indigenous peoples is a national priority and efforts to increase physical activity levels have the potential to reduce the burden of illness associated with physical inactivity.. National and international physical activity guidelines recommend that children aged 5-18 years spend at least 60 minutes every day in moderate-to-vigorous physical activity (MVPA).6-9 Studies indicate that most children meet this recommendation, but compliance is associated with the childs age and gender, with a decline commencing in adolescence, and boys typically being more active than girls.1,10-12 Data ...

The effects of creatine and glycerol hyperhydration on running economy in well trained endurance runners | Journal of the...The effects of creatine and glycerol hyperhydration on running economy in well trained endurance runners | Journal of the...

Estimation of oxygen uptake during fast running using accelerometry and heart rate. Med Sci Sports Exerc. 2007, 39: 192-198. ...
more infohttps://jissn.biomedcentral.com/articles/10.1186/1550-2783-8-24

Multicenter Exploratory Study of Accelerometry in Hypertrophic CardiomyopathyMulticenter Exploratory Study of Accelerometry in Hypertrophic Cardiomyopathy

More From BioPortfolio on "Multicenter Exploratory Study of Accelerometry in Hypertrophic Cardiomyopathy". *Related Companies* ... Multicenter Exploratory Study of Accelerometry in Hypertrophic Cardiomyopathy. 2017-07-05 06:53:10 , BioPortfolio ...
more infohttps://www.bioportfolio.com/resources/trial/183791/Multicenter-Exploratory-Study-of-Accelerometry-in-Hypertrophic-Cardiomyopathy.html

Frontiers | Measuring Physical Activity in Free-Living Conditions-Comparison of Three Accelerometry-Based Methods | PhysiologyFrontiers | Measuring Physical Activity in Free-Living Conditions-Comparison of Three Accelerometry-Based Methods | Physiology

Measuring Physical Activity in Free-Living Conditions-Comparison of Three Accelerometry-Based Methods. Anna-Maiju Leinonen1,2,3 ... 2015). Comparability of measured acceleration from accelerometry-based activity monitors. Med. Sci. Sports Exerc. 47, 201-210. ... Welk, G. J., Blair, S. N., Wood, K., Jones, S., and Thompson, R. W. (2000). A comparative evaluation of three accelerometry- ... Although, there are some studies on convergent validity between accelerometry-based methods used in research (Welk et al., 2000 ...
more infohttps://www.frontiersin.org/articles/10.3389/fphys.2016.00681/full

GPS-Based Exposure to Greenness and Walkability and Accelerometry-Based Physical Activity | Cancer Epidemiology, Biomarkers &...GPS-Based Exposure to Greenness and Walkability and Accelerometry-Based Physical Activity | Cancer Epidemiology, Biomarkers &...

GPS-Based Exposure to Greenness and Walkability and Accelerometry-Based Physical Activity. Peter James, Jaime E. Hart, J. Aaron ... Comparison of accelerometry methods for estimating physical activity. Med Sci Sports Exerc 2017;49:617-24. ... Merging GPS and accelerometry data. GPS data were processed and joined to the accelerometer data using the personal activity ... "Spatial Energetics": integrating data from GPS, accelerometry, and GIS to address obesity and inactivity. Am J Prev Med 2016;51 ...
more infohttp://cebp.aacrjournals.org/content/26/4/525

Loughborough University Institutional Repository: International childrens accelerometry database (ICAD): design and methodsLoughborough University Institutional Repository: International children's accelerometry database (ICAD): design and methods

International childrens accelerometry database (ICAD): design and methods. Authors: Sherar, Lauren B.. Griew, Pippa. Esliger, ... International childrens accelerometry database (ICAD): design and methods..pdf. Published version. 1.62 MB. Adobe PDF. View/ ... The International Childrens Accelerometry Database (ICAD) project pooled and reduced raw accelerometer data using standardized ... International childrens accelerometry database (ICAD): design and methods. BMC Public Health, 11, 485. ...
more infohttps://dspace.lboro.ac.uk/dspace-jspui/handle/2134/19504

Validation of activity questionnaires in patients with cystic fibrosis by accelerometry and cycle ergometryValidation of activity questionnaires in patients with cystic fibrosis by accelerometry and cycle ergometry

Accelerometry has therefore been used over the last years to objectively measure physical activity levels and patterns in the ... Table ​Table22 summarizes the physical activity determined by accelerometry and the HAES and 7D-PAR questionnaires as well as ... Accelerometry. The participants wore an accelerometer for 7 days on their right hip (GT1M, ActiGraph, Pensacola, FL, USA). ... First, the accelerometry was performed 2-6 weeks prior to completing the questionnaires. This approach might have weakened the ...
more infohttp://pubmedcentralcanada.ca/pmcc/articles/PMC3359253/

JSMF - Grant Archive - 1997 - Gitendra  Uswatte - Accelerometry: A new approach to real-world outcome measures in rehabilitationJSMF - Grant Archive - 1997 - Gitendra Uswatte - Accelerometry: A new approach to real-world outcome measures in rehabilitation

Accelerometry: A new approach to real-world outcome measures in rehabilitation. Constraint-Induced (CI) Movement Therapy," is ... The general purpose of this Pilot Project is to assess the validity of accelerometry as a measure of real-world motor ... The specific aims of this application are to validate accelerometry as a direct, objective, and continuous measure of the ... Grant Title: Accelerometry: A new approach to real-world outcome measures in rehabilitation ...
more infohttps://www.jsmf.org/grants/1997024/

The private life of echidnas: using accelerometry and GPS to examine field biomechanics and assess the ecological impact of a...The private life of echidnas: using accelerometry and GPS to examine field biomechanics and assess the ecological impact of a...

2008). Identification of animal movement patterns using tri-axial accelerometry. Endanger. Species Res. 10, 47-60. doi:10.3354/ ... Using accelerometry segments associated with video activities as training data, each epoch was manually assigned to one of the ... 2016) used accelerometry to classify various behaviours for free-ranging brown hares (Lepus europaeus). Accelerometers have ... Activity classification from accelerometry. In total, 24,507 summer epochs and 78,183 spring epochs were included in the ...
more infohttps://jeb.biologists.org/content/219/20/3271

JMIR-Estimation of Physical Activity Levels Using Cell Phone Questionnaires: A Comparison With Accelerometry for Evaluation of...JMIR-Estimation of Physical Activity Levels Using Cell Phone Questionnaires: A Comparison With Accelerometry for Evaluation of...

Estimation of Physical Activity Levels Using Cell Phone Questionnaires: A Comparison With Accelerometry for Evaluation of ...
more infohttp://www.jmir.org/2011/3/e70/

JMIR-Citations for Estimation of Physical Activity Levels Using Cell Phone Questionnaires: A Comparison With Accelerometry for...JMIR-Citations for Estimation of Physical Activity Levels Using Cell Phone Questionnaires: A Comparison With Accelerometry for...

Works citing "Estimation of Physical Activity Levels Using Cell Phone Questionnaires: A Comparison With Accelerometry for ...
more infohttp://www.jmir.org/article/citations/1686

What a jerk: prey engulfment revealed by high-rate, super-cranial accelerometry on a harbour seal (Phoca vitulina) | Journal of...What a jerk: prey engulfment revealed by high-rate, super-cranial accelerometry on a harbour seal (Phoca vitulina) | Journal of...

What a jerk: prey engulfment revealed by high-rate, super-cranial accelerometry on a harbour seal (Phoca vitulina) ... What a jerk: prey engulfment revealed by high-rate, super-cranial accelerometry on a harbour seal (Phoca vitulina) ... What a jerk: prey engulfment revealed by high-rate, super-cranial accelerometry on a harbour seal (Phoca vitulina) ... What a jerk: prey engulfment revealed by high-rate, super-cranial accelerometry on a harbour seal (Phoca vitulina) ...
more infohttp://jeb.biologists.org/content/217/15/2814

IET Digital Library: Estimation of respiratory rate from motion contaminated photoplethysmography signals incorporating...IET Digital Library: Estimation of respiratory rate from motion contaminated photoplethysmography signals incorporating...

Estimation of respiratory rate from motion contaminated photoplethysmography signals incorporating accelerometry. * HTML 111.60 ... accelerometry; respiratory rate; motion contaminated photoplethysmography signals; motion states; accelerometer sensors; ...
more infohttps://digital-library.theiet.org/content/journals/10.1049/htl.2018.5019

Physical Activity in Pediatric Pulmonary Arterial Hypertension Measured by Accelerometry: A Candidate Clinical Endpoint | ...Physical Activity in Pediatric Pulmonary Arterial Hypertension Measured by Accelerometry: A Candidate Clinical Endpoint | ...

Accelerometry has previously been used in adults and children to measure physical activity, but whether accelerometry ... Conclusions Accelerometry is a feasible measure of physical activity, even in young children with PAH who would otherwise be ... Finally, use of accelerometry for tracking individual activity levels in response to changes in therapy may be beneficial for ... Accelerometry should be considered as a clinically meaningful endpoint in pediatric PAH, and may be useful to implement in ...
more infohttps://www.theactigraph.com/research-database/physical-activity-in-pediatric-pulmonary-arterial-hypertension-measured-by-accelerometry-a-candidate-clinical-endpoint-2/

Variability and reliability study of overall physical activity and activity intensity levels using 24 h-accelerometry-assessed...Variability and reliability study of overall physical activity and activity intensity levels using 24 h-accelerometry-assessed...

... as assessed using 24 h-accelerometry, is highly variable between days, but the day of assessment or the day of the week explain ... 24 h-accelerometry is now used to objectively assess physical activity (PA) in many observational studies like the German ... 24 h-accelerometry is now used to objectively assess physical activity (PA) in many observational studies like the German ... 24 h-accelerometry in epidemiological studies: automated detection of non-wear time in comparison to diary information. Sci Rep ...
more infohttps://bmcpublichealth.biomedcentral.com/articles/10.1186/s12889-018-5415-8

Development and application of a machine learning algorithm for classification of elasmobranch behaviour from accelerometry...Development and application of a machine learning algorithm for classification of elasmobranch behaviour from accelerometry...

Carroll G, Slip D, Jonsen I, Harcourt R (2014) Supervised accelerometry analysis can identify prey capture by penguins at sea. ... Williams H, Shepard E, Duriez O, Lambertucci S (2015) Can accelerometry be used to distinguish between flight types in soaring ... Here a tool is developed to classify shark behaviour from accelerometry data, using the juvenile lemon shark (Negaprion ... Behavioural classifications were applied to 2400 h of accelerometry data obtained in the wild (n = 18). Headshake predictions ...
more infohttps://rd.springer.com/article/10.1007/s00227-018-3318-y

Convergent validity: agreement between accelerometry and the Global Physical Activity Questionnaire in college-age Saudi men |...Convergent validity: agreement between accelerometry and the Global Physical Activity Questionnaire in college-age Saudi men |...

... but had low agreement with accelerometry for estimating MVPA, and very low agreement with accelerometry for estimating ... The agreement between the GPAQ and accelerometry for moderate to vigorous PA (MVPA) was weak (r ≤ 0.32). Participants ... This study aimed to investigate the agreement between the GPAQ and accelerometry, as well as the test-retest reliability of the ... The GPAQ is reliable, but had low agreement with accelerometry for estimating MVPA, and very low agreement with accelerometry ...
more infohttps://bmcresnotes.biomedcentral.com/articles/10.1186/s13104-016-2242-9

Accelerometry-Based Monitors - Physical Activity and Health Promotion LabAccelerometry-Based Monitors - Physical Activity and Health Promotion Lab

Research on Accelerometry-based Activity Monitors. One of the main focuses of our lab is to improve the accuracy, feasibility ... Kim, Y., & Welk, G. J. (2015). Criterion Validity of Competing Accelerometry-based Activity Monitoring Devices. Medicine and ... Welk, G.J., McClain, J., & Ainsworth, B.E. (2012). Protocols for evaluating equivalency of accelerometry-based activity ... Surveillance of youth physical activity and sedentary behavior with wrist accelerometry. American Journal of Preventive ...
more infohttp://www.physicalactivitylab.org/accelerometry-based-monitors.html

Wearable accelerometry-based technology capable of assessing functional activities in neurological populations in community...Wearable accelerometry-based technology capable of assessing functional activities in neurological populations in community...

This review aims to explore wearable accelerometry-based technology (ABT) capable of assessing mobility-related functional ... Yang C-C, Hsu Y-L, Shih K-S, Lu J-M: Real-time gait cycle parameter recognition using a wearable accelerometry system. Sensors ... Accelerometry-based technology implemented in non-clinical settings. From this reviews twelve featured studies, only three [33 ... Accelerometry-based outcome measures were deemed valid if the methods were cross-validated with a "gold standard" criterion, ...
more infohttps://jneuroengrehab.biomedcentral.com/articles/10.1186/1743-0003-11-36

Association of Accelerometry‐Measured Physical Activity and Cardiovascular Events in Mobility‐Limited Older Adults: The LIFE ...Association of Accelerometry‐Measured Physical Activity and Cardiovascular Events in Mobility‐Limited Older Adults: The LIFE ...

Ekelund U, Luan J, Sherar LB, Esliger DW, Griew P, Cooper A; International Childrens Accelerometry Database (ICAD) ... While accelerometry is capable of accurately capturing low levels of PA, the CHAMPS survey may not be graded in a way that ... Five baseline daily accelerometry measures of interest were included in this analysis one at a time: total activity counts, ... Each accelerometry measure was also defined as a time‐dependent variable and refitted to allow for time‐dependent covariates. ...
more infohttp://jaha.ahajournals.org/content/6/12/e007215

Combined influence of epoch length, cut-point and bout duration on accelerometry-derived physical activity | International...Combined influence of epoch length, cut-point and bout duration on accelerometry-derived physical activity | International...

Cook I, Alberts M, Lambert EV: Influence of cut-points on patterns of accelerometry-measured free-living physical activity in ... Of the original sample of 270 participants with accelerometry data, two accelerometers were set up in 60-s epochs, thus ... Technological advancements in accelerometry have increased the capabilities of available data collection, processing methods ... Caution must therefore be given to comparisons between adult PA investigations using accelerometry without adjustments for ...
more infohttps://0-ijbnpa-biomedcentral-com.brum.beds.ac.uk/articles/10.1186/1479-5868-11-34

Tonic-clonic seizure detection using accelerometry-based wearable sensors: a prospective, video-EEG controlled studyTonic-clonic seizure detection using accelerometry-based wearable sensors: a prospective, video-EEG controlled study

HomeBlogTonic-clonic seizure detection using accelerometry-based wearable sensors: a prospective, video-EEG controlled study ... Tonic-clonic seizure detection using accelerometry-based wearable sensors: a prospective, video-EEG controlled study. ...
more infohttp://epilepsia.sen.es/?p=2444

Plus itPlus it

The 12,772 participants had at least 1 valid day of accelerometry data, which was defined as 10 or more hours of wear time (17 ... Accelerometry.. Activity was assessed using the ActiGraph AM-7164 accelerometer (ActiGraph, Fort Walton Beach, FL). The monitor ... Few studies have used accelerometry to examine the role of sedentary activities on metabolic risk (13,14). These studies have ... An important strength of our study is that sedentary behavior was measured objectively by accelerometry, but accelerometers are ...
more infohttp://care.diabetesjournals.org/content/34/2/497

Low 25-Hydroxyvitamin D Levels in Adolescents: Race, Season, Adiposity, Physical Activity, and Fitness | Articles | PediatricsLow 25-Hydroxyvitamin D Levels in Adolescents: Race, Season, Adiposity, Physical Activity, and Fitness | Articles | Pediatrics

Physical Activity (Accelerometry). The time (minutes) per day spent in moderate and vigorous physical activities was assessed ... Lenders et al14 found that physical activity assessed through accelerometry was positively related to 25-hydroxyvitamin D ...
more infohttp://pediatrics.aappublications.org/content/125/6/1104

Lifestyle Triple P: a parenting intervention for childhood obesity | BMC Public Health | Full TextLifestyle Triple P: a parenting intervention for childhood obesity | BMC Public Health | Full Text

Accelerometry. Childrens physical activity levels are measured using an Actigraph accelerometer (Actigraph, Pensacola, Florida ...
more infohttps://bmcpublichealth.biomedcentral.com/articles/10.1186/1471-2458-12-267
  • Dual-axis accelerometry signals were collected prospectively with simultaneous videofluoroscopy (VFSS) during swallows of liquid barium stimuli in thin, mildly, moderately and extremely thick consistencies. (springer.com)
  • Twenty-nine children with PAH and 60 age- and sex-matched control children completed the accelerometry study. (theactigraph.com)
  • The aim of this study was to quantify the variability of overall PA and of time spent in different PA intensities assessed through 24 h-accelerometry in a general adult population. (biomedcentral.com)
  • This study aimed to investigate the agreement between the GPAQ and accelerometry, as well as the test-retest reliability of the GPAQ in Saudi college-age men. (biomedcentral.com)
  • Finally, use of accelerometry for tracking individual activity levels in response to changes in therapy may be beneficial for assessing treatment effects. (theactigraph.com)
  • Yet, accelerometry and cycle ergometry are expensive and time consuming and require specialized equipment. (pubmedcentralcanada.ca)
  • Accelerometry should be considered as a clinically meaningful endpoint in pediatric PAH, and may be useful to implement in future trial design as an adjunct to six-minute walk testing, particularly for younger children or those with developmental disabilities. (theactigraph.com)