Eccentric contractions. Medical search. Frequent questions

Objectives: The magnitude of muscle damage induced by maximal eccentric contractions (MaxEC) of the elbow flexors (EF) is reduced when it is preceded by low-intensity (10% of maximal voluntary isometric contraction strength) eccentric contractions (10%EC) of the same muscle, or by MaxEC of the opposite EF. (edu.au)
they include isometric contraction (no movement), isotonic contraction, and concentric contraction (shortening). (wikipedia.org)
Isometric contraction- No change or movement in muscle length while the muscle is contracting. (speedendurance.com)

isometric contractions have been shown to generate a maximum amount of intramuscular tension for a longer period of time than is seen during a typical dynamic/isotonic contraction. (stack.com)

Contractile element simulates the behaviour of skeletal muscle when it is subjected to eccentric and concentric contraction. (techscience.com)
This research aims to estimate the stress induced in skeletal muscle in eccentric and concentric contraction with respect to the predefined strain. (techscience.com)
With the use of mathematical model for contraction of skeletal muscle for eccentric and concentric contraction, the stress induced in the skeletal muscle is estimated in this research. (techscience.com)
This can be useful to understand the mechanical behaviour of skeletal muscles in eccentric and concentric contraction with clinical relevance. (techscience.com)
Postexercise muscle soreness, also known as delayed-onset muscle soreness (DOMS), is defined as the sensation of discomfort or pain in the skeletal muscles following physical activity, usually eccentric, to which an individual is not accustomed. (medscape.com)
Skeletal muscles show fascinating plasticity against repeated episodes of eccentric exercise. (businessintelligence.pl)
Effect of contraction history on torque deficits by stretches of active rat skeletal muscles. (cdc.gov)

Thus, any form of exercise with eccentric muscle contractions causes more DOMS than does exercise with concentric muscle contractions. (medscape.com)

For example, with a bicep loop, the action of lowering the elevator dumbbell is the eccentric phase of this exercise - as long as the dumbbell is slowly lowered instead of dropping it (that is, the biceps are in a state of contraction to control the rate of descent of the dumbbell). (businessintelligence.pl)
For example, in a biceps curl the action of lowering the dumbbell back down from the lift is the eccentric phase of that exercise - as long as the dumbbell is lowered slowly rather than letting it drop (i.e., the biceps are in a state of contraction to control the rate of descent of the dumbbell). (wikipedia.org)
As you curl up, you're putting resistance on the biceps brachii, which in turn engages and tightens, a process called a concentric contraction . (healthline.com)
As you slowly release the weights back down, you create an eccentric contraction, which elongates the muscle fibers in the biceps. (healthline.com)

Eccentric training is particularly good for casual and high-performance athletes or the elderly and patients looking to rehabilitate certain muscles and tendons. (wikipedia.org)
It's been demonstrated that a focus on eccentric contractions has a positive influence on bone mineral density as well as the strength of tendons and intramuscular tissue (think fascia and the collagen which holds the bundles of muscle fibers together. (stack.com)
A November 2014 World Journal of Orthopedics article concludes that the subscapularis muscle could benefit more from eccentric contractions, the use of which is considered a guiding principle in the rehabilitation of tendons. (livestrong.com)

Low-intensity elbow flexion eccentric contractions attenuate maximal e" by Trevor C. Chen, Ming J. Lin et al. (edu.au)
Results: No significant changes in maximal voluntary concentric contraction torque, plasma creatine kinase activity and muscle soreness were evident after 10%EC. (edu.au)
After three contractions using maximal and submaximal activation (80 and 20 Hz) at an ankle position of 40 (i.e., long muscle length) and with maximal activation at 120 (i.e., short muscle length), the isometric and stretch torques (15 stretches) of rat plantar flexor muscles (bout 1) were measured. (cdc.gov)
Stretches (i.e., ankle rotation from 90 to 40, velocity: 50 s-1) were imposed on maximal isometric contractions at 90 (i.e., preloaded stretches). (cdc.gov)
After maximal contractions at long muscle length, preload torque at 90 and stretch torque at 40 for stretch 1 of bout 1 were 25% and 18% lower than the other groups. (cdc.gov)
Because strength is influenced by the amount of time muscles spend under maximal tension, isometric contractions can increase the amount of high-threshold motor units available at that specific point in a joint's range of motion. (stack.com)

Exercise involving eccentric muscle contractions results in greater disruption or injury to the muscle tissues than does concentric exercise. (medscape.com)
Prior research has investigated the effects of either eccentric-only training or comparing eccentric and concentric exercise on changes related to strength and power expression, but no research to date has investigated the impact of altering the duration of either the concentric or eccentric component on these parameters. (unm.edu)

All participants completed a four-week training protocol that required them to complete two workouts per week using their prescribed contraction routine for 4 sets of 6 repetitions at an intensity of 80 - 85% 1RM. (unm.edu)
eccentric bench press repetitions to failure. (researchgate.net)
Isometric exercises: On alternate days, 4-5 repetitions of 30 seconds with 1-2 minutes of rest between repetitions, progressively increasing the time up to 45 seconds, at 70% of their calculated maximum voluntary contraction using a dynamometer. (who.int)
Eccentric exercises: 3 sets of 10 repetitions on alternate days, gradually increasing the load (2.5-5%), aiming for slight discomfort not exceeding 4-5/10 on the pain visual analog scale (EVA). (who.int)

The 5 most important preventative exercises were: flexibility, core, combined contractions, balance and eccentric. (bmj.com)
Through the electromyographic signal it is possible to study the response to the therapeutic exercises commonly used in rehabilitation regarding the beginning and end of the activity, type of muscle contraction and joint position. (bvsalud.org)

Therefore, the purpose of this study was to assess the duration of eccentric (i.e. 2-second, 4-second vs. 6-second) muscle contractions and their effect on muscle strength, power production, vertical jump and soreness using a plate-loaded barbell Smith squat exercise. (unm.edu)
In particular, soreness is often associated with eccentric muscle action . (wellandgood.com)

Voluntary contraction of rhomboids, inferior trapezius, and serratus for shoulder stability, and deep flexors and extensors for the neck. (who.int)

Torque deficits, possibly caused by damage to muscle structures and excitation-contraction uncoupling, were not prevented by a history of isometric contractions. (cdc.gov)

A study was conducted to test how eccentric and concentric contractions affect cardiac autonomic modulation after exercise. (businessintelligence.pl)
Associated to these changes, joint instability in GJH patients can alter the modulation of muscle contraction. (bvsalud.org)
It is possible to consider that the proprioceptive changes in the modulation of muscle contraction in individuals with GJH may influence the pattern of electrical activity on masticatory muscles associated to a clinical state of TMD. (bvsalud.org)

Also, plyometrics use eccentric contractions to improve explosive power and elasticity which are important in sports that require jumping and sprinting. (speedendurance.com)

These are important considerations for the strength and conditioning professional to more fully understand that expressions of strength and power through eccentric training and varying durations of eccentric activity can have a significant impact for populations ranging from athletes desiring peak performance. (unm.edu)

The results concluded that resistance training (eccentric contractions) promotes strength gain. (businessintelligence.pl)
Eccentric training is a type of strength training that involves using the target muscles to control weight as it moves in a downward motion. (wikipedia.org)
Collectively, concentric and eccentric contractions work together to build muscle strength. (healthline.com)
One criticism of isometric training is that the strength gained is only going to be specific to the position where the contraction took place. (stack.com)
They will perform a 10-second contraction with 25% of strength intensity during each 10-second contraction. (who.int)

17] A contraction in performance occurs when resistance opposes muscle contraction. (businessintelligence.pl)
During the contraction of the subscapularis, internal or medial rotation of the humerus occurs. (livestrong.com)
Eccentric contraction of the subscapularis occurs when the muscle is lengthened under resistance. (livestrong.com)

And minds--at least not like human minds--so by definition, ants because she imagined that Henry's eccentric behavior was cannot be "mentally" ill. (cdc.gov)

For every repetition, all three groups utilized two-second concentric contractions and paused for one second between the concentric and eccentric phases. (unm.edu)

The role of eccentric training is to use these principles of energy conversion to strengthen muscle and tendon groups. (wikipedia.org)

With the use of force-velocity of contraction of muscle, mathematical model is developed. (techscience.com)
To produce a given muscle force, fewer motor units are activated in an eccentric contraction than in a concentric contraction. (medscape.com)
In eccentric contractions, the force is distributed over a smaller cross-sectional area of muscle. (medscape.com)
When the load exceeds the force that can be developed by the muscle at a constant length, as in an eccentric muscle action, the exercise is referred to as involving negative work, because the muscle is absorbing energy. (wikipedia.org)
Eccentric contractions use less metabolic energy, even though they can create more force than concentric actions. (wikipedia.org)
Adolf Eugen Fick discovered in 1882 that "contracting muscle under stretch could produce greater force than a shortening muscle contraction" like in concentric movements. (wikipedia.org)
Eccentric training can improve the eccentric rate of force development and potentiate subsequent concentric contractions. (stack.com)
Deceleration can be improved through eccentric training because it demands that muscles can quickly produce force while they are lengthening. (stack.com)
Eccentric contractions create more force and use less energy than a concentric contraction. (speedendurance.com)
gravity-induced eccentric muscle contractions force your muscle fibers to lengthen, causing them to tear. (trailrunnermag.com)
Fewer muscle fibers are active compared to other types of muscle contractions, distributing the generated force over a smaller area of muscle and resulting in even more damage. (trailrunnermag.com)

This eccentric equipment translates your workouts into in-game input. (kidzworld.com)

Different contraction histories can result in similar isometric torques but different stretch torques. (cdc.gov)
Eccentric Training can create a stiffer muscle, which can protect a hamstring from damage and also increase the amount of elastic energy available in the stretch shortening cycle. (speedendurance.com)

Through the EMGs it is possible to observe the degree, duration, type of muscle contraction, alteration of the composition of the motor units resulting from muscle training programs, recruitment neural strategies, as well as allowing inferences related to muscle fatigue. (bvsalud.org)

We have a weird eccentric vibe, but at the same time, we could belong to the mainstream. (grapevine.is)

Some coaches do not believe that including an eccentric and/or isometric emphasis is important in training programs, but both anecdotal and empirical evidence purport that focusing on these contraction types will result in increased concentric output. (stack.com)
Emphasis on total body eccentric training can elevate resting metabolic rate for up to 2 hours post-workout. (speedendurance.com)

The Triphasic model emphasizes one specific contraction type per training period or block. (stack.com)

Eccentric contractions and cardiac output: How would eccentric exercise affect the heart at lower oxygen costs? (businessintelligence.pl)
And in fact, there is now much more evidence that another large organic molecule, titin, may explain the more enigmatic properties of eccentric contraction.3 An early buildup of leukocytes, mainly neutrophils, has been observed in the blood micro-vessels of the damaged muscle, as well as in the perimisium immediately after exercise. (businessintelligence.pl)

Minor disturbances are thought to lead to an adaptive response reported by cells, while intense eccentric actions appear to produce a more serious response resulting in secondary myofiber damage and an increased risk of necrosis. (businessintelligence.pl)
Eccentric movement provides a braking mechanism for muscle and tendon groups that are experiencing concentric movement to protect joints from damage as the contraction is released. (wikipedia.org)

So if your workout included lots of eccentric muscle actions-like maybe if you lifted weights at a slower tempo than usual-it's normal to feel sore afterward. (wellandgood.com)

Although the term "Triphasic" in a training context was popularized by Dietz and Peterson, their's is not the first work to stress the importance of including deliberate eccentric and isometric work in training programs. (stack.com)
Artists may often be eccentric, but does eccentricity increase the worth of an artist's work? (freakonomics.com)

An eccentric contraction is the movement of an active muscle as it lies under load. (businessintelligence.pl)
Heavy-load eccentric calf muscle training can treat and improve chronic Achillies tendinosis. (speedendurance.com)

Eccentric training focuses on slowing down the process of muscle elongation to challenge the muscles, which can lead to stronger muscles, faster muscle repair and increasing metabolic rate. (wikipedia.org)

With the many types of training programs, coaches, trainers and conditioning specialist use a variety of eccentric loading to improve performance including but not limited to rehabbing injuries. (speedendurance.com)
Numerous studies have shown that using a specific eccentric program can significantly reduce hamstring injuries and rehab tendonitis in various areas. (speedendurance.com)

The Internet wasted no time in commenting on his eccentric T-shirt. (xxlmag.com)

During the eccentric phase of the movement, the muscle absorbs energy. (wikipedia.org)
Examples include pushing an immoveable object (wall), the pause between an eccentric/concentric phase. (speedendurance.com)

And while it has plenty of action and violence, there's also some incredibly heartbreaking storytelling throughout all six seasons. (yahoo.com)

There's a lot of power here, delivered with authority. (maximumrocknroll.com)

Eccentric training is the repeated performance of eccentric muscle contractions. (businessintelligence.pl)

Thirty college-aged males (23 ± 3.5 years, 178 ± 6.8 cm, 82 ± 12 kg and 11.6 ± 5.1 % fat) with 3.0 ± 1.0 years of resistance training experience and training frequency of 4.3 ± 0.9 days per week were randomized and assigned to one of three eccentric training groups that incorporated different patterns of contraction. (unm.edu)
The men (aged 18 to 30 years) were divided into four groups: concentric control, eccentric control, concentric training and eccentric training. (businessintelligence.pl)

Here's the rest of the story. (brasschecktv.com)

The purpose of this study was to identify the effects of eccentric muscle contraction program on walking and balance ability of children with brain Lesion disorder. (kyobobook.co.kr)
The test was conducted for 12 weeks and the subjects had eccentric muscle contraction program for 50 minutes a day and twice a week. (kyobobook.co.kr)

and a focus on concentric contractions for the third block. (stack.com)

Its central position in the sarcomere and the tight association to myosin are the basis for titin's role in maintaining the structural integrity of the sarcomere during the relaxation-contraction cycle. (frontiersin.org)

Anatomy61

Organisms11

Diseases22

Chemicals and Drugs68

Analytical, Diagnostic and Therapeutic Techniques and Equipment21

Psychiatry and Psychology4

Phenomena and Processes63

Disciplines and Occupations2

Anthropology, Education, Sociology and Social Phenomena8

Health Care1

Isometric contraction3

Isotonic contraction1

Skeletal7

DOMS1

Biceps4

Tendons3

Maximal6

Concentric exercise2

Repetitions4

Exercises2

Soreness2

Voluntary1

Torque1

Modulation3

Explosive1

Athletes1

Strength5

Occurs3

Definition1

Phases1

Principles1

Force11

Workouts1

Stretch2

Duration1

Weird1

Emphasis2

Type1

Exercise2

Damage2

Weights1

Work2

Load2

Muscles1

Injuries2

Time1

Phase2

Action1

Power1

Performance1

Groups2

Story1

Program2

Focus1

Position1