THE EFFECT OF FATIGUE ON PEAK GROUND REACTION FORCE AND LOWER EXTREMITY KINEMATICS DURING SINGLE-LEG LANDING IN DANCERS

Abstract

The purpose of this study was to examine the effect of fatigue on peak vertical ground reaction force and lower extremity kinematics during single-leg landing in dancers and non-dancers. Subjects (n=20) were divided into two groups; Dance group (n=10) and Control group (n=10). Subjects performed single-leg drop landing from a 30 cm platform before and after fatigue protocol. Before fatigue protocol, dancers showed significant longer time between initial contact and the maximum ground reaction force achieved compared with the controls. After fatigue protocol, there was significant increase in peak ground reaction force during landing for both dancers and controls. Both groups also showed significant increase in hip and knee flexion after fatigue protocol.