The Target: Total Fitness - Physical activity and fatigue

The advice that counsels moderation in launching a fitness program or in starting new phases of it has a sound basis in physiology. The purpose is to avoid excessive fatigue. Muscular fatigue is defined as stimulation of a muscle or group of muscles beyond their ability to recover. A second type of fatigue affects the entire body. Known as physical fatigue, this form can be regarded as normal after physical exercise if it does not suggest undue stress.