9.1. NECESSARY GENERAL CONCEPTS AND DEFINITIONS
LECTURE
PLYOMETRIC (ECCENTRIC) CONTRACTION: Extend a muscle in an effort to withstand an external load. Similar terms: Eccentric contraction, negative contraction, decentralized contraction, recurrent contraction.
PLYOMETRIC EXERCISES: Exercises whose main feature is strong muscle contraction resulting from fast and dynamic strain or violent but controlled stretching.