Abstract
Strength deficits between legs following joint replacement surgery may be an important limiting factor in an individuals ability to return to a normal activity level. The purpose of this study was to investigate hip extension and flexion strength deficits following total hip arthroplasty (THA). Fourteen patients (8 females & 6 males, age 74.8±1.2 yrs) performed three maximal concentric hip extension and flexion repetitions at isokinetic speeds of 60 and 120 degrees per second. Tests were performed pre and 60 days post-operatively. Strength deficits were expressed as a percentage of the non-operative hip. Below are the results (mean±SE) of each test.Table These results reveal that the hip flexor strength deficit is significantly less than pre-operative levels at 60 days and demonstrates hip flexor strength equanimity. Although the hip extensor strength deficit was not significantly less than pre-operative levels, the results did exhibit a similar trend as the hip flexors. This suggests that hip extensor strength deficits following THA remain relatively high as late as 60 days post-op. Therefore, caution should be exercised when returning THA patients to previous functional activities which involve the hip extensor musculature.
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