What is the role of muscles during contraction?

Muscles play a critical role in movement by contracting and pulling on bones, which is the foundation of human locomotion. When a muscle contracts, it shortens, creating tension that pulls on the tendons attached to the bones. This action results in the movement of body parts, whether it’s lifting an arm, walking, or performing any other physical activity. The ability to generate force through contraction is essential for both voluntary movements, such as running and jumping, and involuntary movements, like maintaining posture.

While muscles do contribute to stabilizing the skeleton, assisting in breathing, and maintaining body temperature, these functions are considered secondary roles. The primary function during contraction is the application of force directed towards bodily movement. Hence, the key focus of muscle contraction is to create movement by pulling on the skeletal system.