BPK 142 Lecture Notes - Lecture 8: Olympic Weightlifting, Muscle Hypertrophy, Myocyte

• School: Simon Fraser University
• Department: Biomedical Physio & Kines
• Course: BPK 142
• Professor: Craig Asmundson

Document Summary

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. Eccentric contractions are usually 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 such as cybex, Isokinetic machine, but many of these machines can also test strength in isometric, concentric, and eccentric modes.