A form of training that develops explosive power. It consists of performing of hops, bounds, and jumps so that maximum effort is expended while a muscle group is lengthening. During plyometrics, a concentric muscle action (shortening) is immediately followed by an eccentric action (lengthening). This combination of dynamic muscle action is believed to use the stretch reflex in such a way that more than the usual number of motor units are recruited. Plyometrics forms part of the training programmes for most sprinters, jumpers, and throwers. However, there is a high risk of injury for those who are not well-conditioned.
Subjects: Sports and Exercise Medicine.