HIP JOINT KINETIS CONTRIBUTING TO UPPER BODY TWISTING DURING PIRUETT~E N DEHOR IN CLASSICAL BALLET

Abstract

The aim of this study was to investigate the hip joint kinetics contributing to the upper body rotation during the initial phase of pirouette en dehor in classical ballet. The hypotheses were that the contributions of the hip joint kinetics would change depending on the phases and numbers of rotations. Pirueflbs en dehor from single to quadruple revolutions were captured and analysed by the inverse dynamics method. The hip abductor torque of the anterior leg, the hip flexor and adductor torques of the posterior leg contributed to the rotation (90-130%, 36-47% and 26-36%, respectively) during a double stance phase. These increased with every number of revolutions. The hip internal rotator torque of the anterior leg and moment of the anteroposterior hip joint reaction force of the posterior leg limited the rotation during the double and the following single stance phase.