Biomechanical Research on the Balance Control of Pirouettes in Classical Dance

Objective: The present research investigated the biomechanical mechanism and its related factors of the balance control of Pirouettes in classical dance, in order to provide a theoretical basis for training of spinning movements. Methods: Four female professional classical dancers participated in this research. Their kinematic, kinetic, and myoelectric parameters of movements were recorded with infrared high-speed cameras, 3-Dimension force plate, and surface EMG, followed by statistical analyses. Results: The knee and ankle angles of supporting leg of classical dancers increased steadily with spinning & stretching, and reached successively and remained their maximum supporting angles. There were many small waves in the curves of the X and Y reaction forces. The iEMG proportion was the greatest on the ankle joint muscles, relatively lower on the knee joint muscles, and minimum on the core muscles. Conclusions: The ankle & knee strength and the movement control of the supporting leg were the key factors in bal