Question

During what phase of the stretch-shortening cycle is stored elastic energy converted to explosive force production?

A. Eccentric phase
B. Amortization phase
C. Concentric phase
D. Isometric phase

Answer 1

The stored elastic energy is converted to explosive force production during the Concentric phase of the stretch-shortening cycle, where the muscle actively shortens to produce force.

Step-by-step explanation:

The phase of the stretch-shortening cycle during which stored elastic energy is converted to explosive force production is the Concentric phase. In this phase, typically associated with isotonic contractions, the muscle actively shortens while producing force. An example of this is when a muscle such as the biceps brachii contracts to lift a weight upward, the muscle fibers shorten and the load is moved. During the concentric phase, the previously stored elastic energy from the prior eccentric contraction is unleashed, allowing the muscle to generate more force and power, contributing to explosive movement, which is essential in various athletic activities.