INTRODUCTION: The injuries such as muscle strain or ankle sprain of swimmers often occurred during activities on the ground. It suggests that the injuries may be caused by their hyper mobility of the ankle joint or the reduction of the performance with the antigravity movement, but the real causes have not been elucidated yet. The measurement of jumping performance is widely used to evaluate the physical condition and trainability of athletes, but not so much of swimmers. The purpose of this study is to investigate the differences in the vertical jumping performance between Swimmers (SW) and Track and Field athletes (TF) in order to elucidate their properties of power output of lower limbs and to prevent the injuries of swimmers. METHODS: 12 male SW and 9 male TF in N university were participated. All subjects performed counter movement jump (CMJ) and squat jump (SJ) on the portable force plate. The changes in jumping height, displacement and velocity of center of mass (COM) were derived from the time series of the ground reaction force (GRF) collected with sampling frequency at 400 Hz. The same measurements were performed before (Pre) and after (Post) 6 months routine training. RESULTS: For SW, a significant increase in jumping height was observed in SJ (Pre;0.36±0.04m)
© Copyright 2010 Biomechanics and Medicine in Swimming XI - Abstracts. Published by Norwegian School of Sport Sciences. All rights reserved.