APA 2312 Lecture Notes - Lecture 9: Hypertrophy, Delayed Onset Muscle Soreness, Myofibril
4 Apr 2016
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Lacic acid is produced since beginning of exercise, but we can get rid of it as it"s produced. Lt is not the point from which body switches from anaerobic metabolism. At lt, the body is using both aerobic & anaerobic metabolism to break down glucose. Etc is the only one that is aerobic. Type iia ibers: larger motor neurons, faster, reach max force faster, well developed sr. Motor units are acivated on the basis of a ixed order - The order of motor unit recruitment is directly related to motor neuron size. Oxidaive (aerobic) training: ii (especially iia) becomes more oxidaive. Inacivity: limb immobilizaion: decrease so (i), increased fog (ii) Motor neuron death in both st and ft. No apparent preferenial loss of ft ibers. Elderly people cannot brace themselves nearly as well as we can. Antagonists opposite agonists to prevent overstretching of them. Synergists assist agonists, someimes ine- tune direcion of movement.
