How would you describe concentric muscle action?

Concentric muscle action refers to the process in which a muscle shortens while generating force. This type of contraction occurs when the muscle fibers contract and pull on the bones to which they are attached, overcoming resistance and effectively causing movement. For example, when performing a bicep curl, the upward movement of the forearm results from the contraction of the biceps muscle as it shortens.

As the muscle shortens, it works to lift a load or resist gravity, which plays a crucial role in various physical activities and exercises. Understanding concentric contraction is vital for designing effective training programs, as it contributes significantly to strength building and muscle development.