BPK 142 Lecture Notes - Lecture 7: Olympic Weightlifting, Muscle Hypertrophy, Myocyte
15 Mar 2016
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Unit 10, 11, 12: muscular strength & endurance. Muscular strength the greatest amount of force that muscles can produce in a single maximal effort. Power work per unit time or force x velocity. Power involves strength and speed: types of muscular contraction, dynamic (isotonic) contraction - the bony levers move through a range of motion when the appropriate muscles perform work. Concentric contraction - the muscle shortens with varying tension as it lifts a constant load. Eccentric contraction - the external resistance exceeds the muscle force and the muscle lengthens while developing force; used in resisting gravity: isometric contraction - static contraction. Use free weights or machines that allow dynamic muscle contractions. Relatively inexpensive, high reliability if body position is carefully standardized for each trial of the test: computer-assisted, isokinetic methods - equipment like biodex & kin-com. Sokinetic machine, but many of these machines can also test strength in isometric, concentric, and eccentric modes.
