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[Effect of training on the structural-metabolic indicators in athletes' skeletal muscles]. 1993

T L Nemirovskaia, and B S Shenkman, and A N Nekrasov, and A V Kuznetsov, and V A Saks

Muscle biopsy samples were taken from m.vastus lateralis of ski-runners during the training season and 4 months after training (consisting presumably of aerobic exercises). Metabolic enzyme activities, fiber cross-sectional areas, capillary supply indices and parameters of oxygen uptake by intact mitochondria in skinned fibers were measured. Training did not induce any appreciable changes in the NADH-tetrazolium reductase activity, maximal oxygen uptake by mitochondria, mean fiber size or capillary density. At the same time, there were significant increases in the cytochrome c oxidase activity, respiratory control index and creatine-stimulated respiratory rate. The activities of alpha-glycerophosphate dehydrogenase, malate dehydrogenase and myoglobin peroxidase as well as the basal respiratory rate of mitochondria decreased as a result of training. The data obtained testify to the possibility of qualitative adaptations in the respiratory chain of mitochondria.

UI MeSH Term Description Entries
D008931 Mitochondria, Muscle Mitochondria of skeletal and smooth muscle. It does not include myocardial mitochondria for which MITOCHONDRIA, HEART is available. Sarcosomes,Mitochondrion, Muscle,Muscle Mitochondria,Muscle Mitochondrion,Sarcosome
D009132 Muscles Contractile tissue that produces movement in animals. Muscle Tissue,Muscle,Muscle Tissues,Tissue, Muscle,Tissues, Muscle
D010100 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. Dioxygen,Oxygen-16,Oxygen 16
D010806 Physical Education and Training Instructional programs in the care and development of the body, often in schools. The concept does not include prescribed exercises, which is EXERCISE THERAPY. Education, Physical,Physical Education,Physical Education, Training
D004734 Energy Metabolism The chemical reactions involved in the production and utilization of various forms of energy in cells. Bioenergetics,Energy Expenditure,Bioenergetic,Energy Expenditures,Energy Metabolisms,Expenditure, Energy,Expenditures, Energy,Metabolism, Energy,Metabolisms, Energy
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000293 Adolescent A person 13 to 18 years of age. Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D012865 Skiing A snow sport which uses skis to glide over the snow. It does not include water-skiing. Snowboarding,Snow Skiing,Skiing, Snow,Skiings, Snow,Snow Skiings

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