편측성 체중 부하 엉덩관절 벌림 운동 시 골반 움직임의 실시간 시각적 바이오피드백이 엉덩이 근육 활성화 및 몸통 측면 기울기에 미치는 영향

Background The role of the gluteus medius muscle in walking or weight-bearing activities is important, and unilateral weight-bearing exercises are used as rehabilitation strengthening exercises. Compensatory movement such as trunk lateral tilt toward the weight-bearing side can occur; however, no studies have confirmed how controlling the pelvic movement affects trunk lateral tilt. Objectives The purpose of this study was to investigate the effect of real-time visual biofeedback of pelvic movement on gluteal muscle activity and trunk lateral tilt during unilateral weight-bearing hip abduction exercise. Methods A total of 18 healthy adults were recruited for this study. During the unilateral weight-bearing hip abduction exercise with and without real-time visual biofeedback of the pelvic movement, gluteus medius muscle activity and trunk lateral tilt were measured. The trunk lateral tilt movements were analyzed using the Kinovea® program. Changes in gluteus medius muscle activity and trunk lateral tilt between unilateral weight-bearing hip abduction exercises with and without real-time visual biofeedback of pelvic movement were statistically analyzed using t-test. Results There was a significant increase in gluteus medius muscle activity and a significant decrease in trunk lateral tilt during exercise with real-time visual biofeedback compared to that without real-time visual biofeedback (p < 0.001). Conclusions Real-time visual biofeedback of pelvic movement during unilateral weight-bearing hip abduction exercise can effectively increase the muscle activity of the gluteus medius muscle by minimizing compensatory actions such as trunk lateral tilt.