PHYS ED 32 Lecture Notes - Lecture 4: One-Repetition Maximum, Strength Training, Injury Prevention

• School: Berkeley
• Department: Physical Education
• Course: PHYS ED 32
• Professor: Sue Johannessen

Document Summary

Muscular strength is the amount of force a muscle can produce with a single maximum effort. Muscular endurance is the ability to resist fatigue while holding or repeating a muscular contraction. Muscles consist of individual muscle cells or fibers, connected in bundles which enables the body to move. Sarcomere: protein of muscle down to the microscopic level. Elastin: malleable -- can more easily be deformed & reformed; has a wave-like appearance in muscle tissue. Proper strength training increases the size of individual fibers, resulting in hypertrophy. Larger muscle fibers mean increased muscle mass & a greater capacity to generate force. Increased strength and size of muscle fibers from both high-load (mostly fast-twitch) & high-repetition (mostly slow-twitch) programs. Muscle fibers are classified according to their strength, speed of contraction & energy source: (table 8. 2) Don"t contract as rapidly & forcefully as fast-twitch fibers. Rely primarily on the aerobic (oxidative) energy system. Aka slow type i, red, s. o. (slow oxidative fiber)