Muscle Function

Muscle function involves the contraction and relaxation of muscle fibers to produce movement and maintain posture. When your brain sends a signal through nerves, muscles respond by shortening (contracting), pulling on bones or other tissues. This process requires energy from food and relies on specialized proteins within muscle cells. Muscles also help stabilize joints, generate heat, and support vital functions like breathing and circulation. Proper muscle function depends on good coordination, strength, and endurance, and can be affected by injury, illness, or fatigue.