GAIT DOES NOT RETURN TO NORMAL FOLLOWING TOTAL HIP ARTHROPLASTY: IMPLICATIONS FOR A RETURN TO ATHLETIC ACTIVITIES

Abstract

The purpose of this study was to determine the effect of total hip arthroplasty (THA) on the biomechanics of the lower extremity during walking. Twenty THA patients and 20 healthy control participants performed several trials of level walking for which three-dimensional (3D) hip, knee and ankle angles, forces, moments and powers were recorded and calculated. Results revealed that the gait mechanics of THA patients do not return to normal following surgery, especially during the transition from double- to single-limb stance. These patients produced lower hip abduction moments that are perhaps a result of hip abductor weakness. Kinematic and kinetic adaptations at the distal joints were also found. Hip musculature deficiencies should be addressed in rehabilitation programs, especially if patients want to return to athletic activities.