THE INFLUENCE OF FOOT ALIGNMENT ON KINEMATIC PARAMETERS OF GAIT IN BALLET DANCERS

Abstract

The aim of this study was to assess the relationship between kinematic parameters and foot rotation relating to gait direction. Thirty-two professional ballet dancers (15 males, 17 females; age 26.8±5.6 years) participated in this research. Each participant performed five trials of gait at self-selected walking speed. Kinematic data was obtained using the optoelectronic system Vicon MX. Foot axis angle (°) was obtained by Footscan (RSscan International). Significant differences (p < 0.05) between the kinematic variables and foot axis angle were observed at knee flexion in the stance phase and ROM (range of motion) and maximum pelvic rotation in female as well as knee ROM in the frontal plane, and maximum pelvic obliquity and rotation in men. Significant differences between two groups of dancers with foot axis angle under and above 15 degrees were found for the knee and pelvic kinematic variables. This altered movement can lead to increased stress load on the joints of the lower limbs and predispose to injuries or early degenerative changes in the musculoskeletal system. Avoiding excessive foot external rotation during gait may reduce load on the musculoskeletal system and may prevent injuries.