Fitness Science

Body fat caliper formulas are equations that convert skinfold measurements into an estimate of body fat percentage. By measuring subcutaneous fat at specific sites, these formul...

The components of fitness describe the key physical capacities that support everyday movement, health, and performance. Health-related components such as cardiorespiratory endur...

Limited ability to bend the arms after a bicep workout is usually due to temporary muscle stiffness, inflammation, and minor microtrauma rather than a serious injury. Understand...

The overload principle means that to improve fitness, strength, or performance, you must expose the body to demands greater than it is accustomed to. When tissues—such as musc...