Horses: Large, hoofed mammals of the family EQUIDAE. Horses are active day and night with most of the day spent seeking and consuming food. Feeding peaks occur in the early morning and late afternoon, and there are several daily periods of rest.Horse Diseases: Diseases of domestic and wild horses of the species Equus caballus.Physical Conditioning, Animal: Diet modification and physical exercise to improve the ability of animals to perform physical activities.Carpus, Animal: The region corresponding to the human WRIST in non-human ANIMALS.Guaifenesin: An expectorant that also has some muscle relaxing action. It is used in many cough preparations.Colic: A clinical syndrome with intermittent abdominal pain characterized by sudden onset and cessation that is commonly seen in infants. It is usually associated with obstruction of the INTESTINES; of the CYSTIC DUCT; or of the URINARY TRACT.Metacarpus: The region of the HAND between the WRIST and the FINGERS.Fecal Impaction: Formation of a firm impassable mass of stool in the RECTUM or distal COLON.Phosphofructokinases: Allosteric enzymes that regulate glycolysis and gluconeogenesis. These enzymes catalyze phosphorylation of fructose-6-phosphate to either fructose-1,6-bisphosphate (PHOSPHOFRUCTOKINASE-1 reaction), or to fructose-2,6-bisphosphate (PHOSPHOFRUCTOKINASE-2 reaction).Hoof and Claw: Highly keratinized processes that are sharp and curved, or flat with pointed margins. They are found especially at the end of the limbs in certain animals.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.Strongylus: A genus of intestinal parasitic nematodes occurring in animals and man.Breeding: The production of offspring by selective mating or HYBRIDIZATION, GENETIC in animals or plants.Metacarpal Bones: The five cylindrical bones of the METACARPUS, articulating with the CARPAL BONES proximally and the PHALANGES OF FINGERS distally.Streptococcus equi: A species of gram-positive, coccoid bacteria isolated from abscesses in submaxillary glands and mucopurulent discharges of the upper respiratory tract of horses. This organism belongs to Group C streptococci with regards to antigen response and is known to cause strangles. The subspecies S. zooepidemicus is also considered a pathogen of horses.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.Rhodococcus equi: A species of RHODOCOCCUS found in soil, herbivore dung, and in the intestinal tract of cows, horses, sheep, and pigs. It causes bronchopneumonia in foals and can be responsible for infection in humans compromised by immunosuppressive drug therapy, lymphoma, or AIDS.Rhabditida Infections: Infections with nematodes of the order RHABDITIDA.Tripelennamine: A histamine H1 antagonist with low sedative action but frequent gastrointestinal irritation. It is used to treat ASTHMA; HAY FEVER; URTICARIA; and RHINITIS; and also in veterinary applications. Tripelennamine is administered by various routes, including topically.Cestode Infections: Infections with true tapeworms of the helminth subclass CESTODA.Actinomycetales Infections: Infections with bacteria of the order ACTINOMYCETALES.Sports: Activities or games, usually involving physical effort or skill. Reasons for engagement in sports include pleasure, competition, and/or financial reward.Myostatin: A growth differentiation factor that is a potent inhibitor of SKELETAL MUSCLE growth. It may play a role in the regulation of MYOGENESIS and in muscle maintenance during adulthood.Cestoda: A subclass of segmented worms comprising the tapeworms.Ambroxol: A metabolite of BROMHEXINE that stimulates mucociliary action and clears the air passages in the respiratory tract. It is usually administered as the hydrochloride.Fatal Outcome: Death resulting from the presence of a disease in an individual, as shown by a single case report or a limited number of patients. This should be differentiated from DEATH, the physiological cessation of life and from MORTALITY, an epidemiological or statistical concept.Taylorella equigenitalis: A species of bacteria which is comprised of gram-negative rods which often approach a spherical shape. They are nonmotile and microaerophilic. They are considered parasites of horses and are pathogenic for mares. (From Bergey's Manual of Determinative Bacteriology, 9th ed)Rhabdomyolysis: Necrosis or disintegration of skeletal muscle often followed by myoglobinuria.Forelimb: A front limb of a quadruped. (The Random House College Dictionary, 1980)Lactic Acid: A normal intermediate in the fermentation (oxidation, metabolism) of sugar. The concentrated form is used internally to prevent gastrointestinal fermentation. (From Stedman, 26th ed)Animal Husbandry: The science of breeding, feeding and care of domestic animals; includes housing and nutrition.Abortion, Veterinary: Premature expulsion of the FETUS in animals.Korea: Former kingdom, located on Korea Peninsula between Sea of Japan and Yellow Sea on east coast of Asia. In 1948, the kingdom ceased and two independent countries were formed, divided by the 38th parallel.Endoscopy: Procedures of applying ENDOSCOPES for disease diagnosis and treatment. Endoscopy involves passing an optical instrument through a small incision in the skin i.e., percutaneous; or through a natural orifice and along natural body pathways such as the digestive tract; and/or through an incision in the wall of a tubular structure or organ, i.e. transluminal, to examine or perform surgery on the interior parts of the body.Continental Population Groups: Groups of individuals whose putative ancestry is from native continental populations based on similarities in physical appearance.Random Allocation: A process involving chance used in therapeutic trials or other research endeavor for allocating experimental subjects, human or animal, between treatment and control groups, or among treatment groups. It may also apply to experiments on inanimate objects.Pulmonary Circulation: The circulation of the BLOOD through the LUNGS.Succinate Dehydrogenase: A flavoprotein containing oxidoreductase that catalyzes the dehydrogenation of SUCCINATE to fumarate. In most eukaryotic organisms this enzyme is a component of mitochondrial electron transport complex II.Pulmonary Wedge Pressure: The blood pressure as recorded after wedging a CATHETER in a small PULMONARY ARTERY; believed to reflect the PRESSURE in the pulmonary CAPILLARIES.Body Temperature: The measure of the level of heat of a human or animal.Animal Feed: Foodstuff used especially for domestic and laboratory animals, or livestock.European Continental Ancestry Group: Individuals whose ancestral origins are in the continent of Europe.Heart Rate: The number of times the HEART VENTRICLES contract per unit of time, usually per minute.Hemorrhage: Bleeding or escape of blood from a vessel.Oxygen: An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.Anoxia: Relatively complete absence of oxygen in one or more tissues.Biomechanical Phenomena: The properties, processes, and behavior of biological systems under the action of mechanical forces.Species Specificity: The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species.African Americans: Persons living in the United States having origins in any of the black groups of Africa.Blood Proteins: Proteins that are present in blood serum, including SERUM ALBUMIN; BLOOD COAGULATION FACTORS; and many other types of proteins.Genetic Variation: Genotypic differences observed among individuals in a population.