SIMPLE INSTRUCTIONS ON THE CROUCH POSITION IMPROVE PERFORMANCE IN THE COUNTERMOVEMENT JUMP

Abstract

The purpose of this study was to determine how simple instructions that modify the depth of countermovement lead to changes in the jump height and the biomechanical parameters related to centre of mass displacement and force application. Twenty-nine active males participated in this investigation and they performed three countermovement jumps using a self-selected crouch position, three countermovement jumps with a deeper crouch position and three countermovement jumps with a shallower crouch position in random order. The results of this study suggest that is possible to improve the jump performance in amateur competitive males with slight modification of the centre of mass displacement having the same physical condition level without any training intervention.