Asymmetric loading and its impact on lateral sway in a healthy population

Asymmetric loading such as carrying bags and side-pack on one side of the body alter individuals’ gait, posture, as well as trunk and lower extremity biomechanics. The primary hip abductor, gluteus medius, is the main contributor for pelvic stabilization during ambulation and dynamic functional activities. This study examined the relationship between asymmetric loading and lateral sway in a healthy populations during the stance phase of the forward dumbbell lunge exercise. Results showed that during single leg support, subjects leaned or swayed significantly toward the weight-bearing side as a compensation to counteract the weight on the opposite side without affecting the gluteus medius muscle activity as compared to that during the symmetrically loaded condition.