Fitness | Fitness

: The ability of a muscle to perform repeated contractions over time without tiring. Flexibility : The range of motion available at a joint.

The concept of fitness has shifted dramatically throughout human history: fitness fitness

Modern fitness is typically categorized into five primary health-related components: : The ability of a muscle to perform

While biological fitness refers to reproductive success, human physical fitness is increasingly tied to mental well-being and life purpose. Purpose keeps the body alive as we age - Facebook fitness fitness

: The ability of the heart and lungs to provide oxygen to muscles during sustained physical activity.

: The maximum force a muscle can exert against resistance.