What happens during concentric contraction of muscles?

During concentric contraction of muscles, the primary action observed is the shortening of the muscle fibers while generating tension. This type of contraction occurs when the muscle is actively working against a resistance to create movement, such as lifting a weight or raising a body part. For example, during a bicep curl, as the bicep contracts to lift the forearm, it shortens and creates the necessary force to move the weight against gravity.

This process is critical for movement and is a key aspect of muscle function in various physical activities. The ability of muscles to shorten and produce tension allows for efficient movement patterns necessary for everyday tasks, exercise, and sports performance.