EXCI 251 Chapter Notes - Chapter 4: Myocyte, One-Repetition Maximum, Strength Training
Document Summary
Muscular strength: the amount of force a muscle can produce with a single maximum effort. Muscular endurance: the ability of a muscle or group of muscles to remain contracted (sustain a level of muscular force) or to contract repeatedly. Muscle fibre: a single muscle cell, usually classified according to strength, speed of contraction, and energy source. Myofibrils: protein structures that make up muscle fibres. Hypertrophy: an increase in the size of a muscle fibre, usually stimulated by muscular overload. Atrophy: a decrease in the size of muscle cells. Hyperplasia: an increase in the number of muscle cells. Slow-twitch fibres: red muscle fibres that are fatigue-resistant but have a slow contraction speed and a lower capacity for tension; usually recruited for endurance activities. Fast-twitch fibres: white muscle fibres that contract rapidly and forcefully but fatigue quickly; usually recruited for actions requiring strength and power.
