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.

A pregnant person may feel better prepared for childbirth if they learn about what different types of contractions feel like. This includes symptoms of Braxton-Hicks contractions, prodromal labor, ...

Kegel exercises are simple movements that strengthen the pelvic floor muscles, and they're not just for women. By regularly contracting and relaxing these muscles, men can ward off incontinence, ...