University of Central Florida (UCF) APK4125C Assessment and Evaluation in Kinesiology Final Practice Exam

In the context of the stretch-shortening cycle, the type of contraction that follows the eccentric phase is a concentric contraction. The stretch-shortening cycle involves a two-phase process where a muscle is first lengthened (eccentric phase) before it shortens (concentric phase). During the eccentric phase, the muscle is actively stretched, which stores elastic potential energy in the muscle and its associated connective tissues. This pre-stretching prepares the muscle for an explosive contraction.

Once the eccentric phase concludes, the muscle quickly transitions into a concentric contraction, where it shortens to produce force. This rapid switch from eccentric to concentric contraction enhances muscle power and efficiency, allowing for greater performance in activities such as jumping, sprinting, and any explosive movement patterns. The concentric phase is essential for translating the stored energy from the eccentric phase into kinetic energy for movement.