Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.

The core components of health-related fitness include cardiovascular and muscular endurance, flexibility, and your body’s ratio of fat compared to muscle and bone. It’s well known that being ...

Human movement is reciprocal in nature: Opposing muscle groups must coordinate for proper movement. Muscle length and strength between opposing muscle groups need to be in balance for normal movement ...

Muscle loss is a common part of aging. For people over 60, maintaining or developing muscles can help prevent falls, maintain mobility, and prevent loss of function. This may be possible through ...

If you've ever finished a difficult workout, you've likely had some postexercise pain. But inner-thigh pain that significantly affects your ability to walk could be a sign of a serious muscle injury.