Clement Golliet: “Youth Training and Plyometrics”

Plyometrics is a compound name that puts two concepts together. It is interesting and useful to remember what they mean: ‘plio’ comes from the Greek and means ‘more’, and ‘metric’ means ‘measure’. So plio + measure equals a quick and powerful movement that involves an eccentric phase (stretching of the muscle) followed by a concentric phase (shortening of the muscle). This is due to an involuntary response from the body to an external force which stimulates the stretch reflex.