Effects of a Deeper Countermovement on Vertical Jump Biomechanics after Three Weeks of Familiarisation - Preliminary Findings

Abstract

This pilot study investigated whether a deeper countermovement was beneficial after a training period for neuromuscular adaptation. Nine male participants practised deep countermovement jumps (2 sets × 10 jumps) at home daily for three weeks. After training, the kinematics and ground reaction forces of normal and deep countermovement jumps were assessed. Adopting a deeper countermovement resulted in lower squat depth [normal: 0.38 (0.08) m, deep: 0.50 (0.09) m, p = .008] and greater range of motion at the ankle, knee and hip (all p