Aerobic Exercise and the FITT Principle

Cardiorespiratory fitness best describes the health and function of the heart, lungs and circulatory system. Cardiorespiratory fitness also describes the capacity of the lungs to exchange oxygen and carbon dioxide with the blood, and the transportation of nutrients and waste products to and from the body’s active tissues. Other terms used and applied to the […]

The Principle of Reversibility – What Happens When You Stop Exercising?

The Principle of Reversibility as it applies to exercise and fitness training means: If you don’t use it, you lose it. This principle is well-grounded in exercise science and is closely related to the biological principle of Use and Disuse. (1) While rest periods are necessary for recovery after workouts, extended rest intervals reduce physical […]