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Purpose: This study aimed to investigate the effects of a pre-hip arthroscopy exercise intervention on hip strength, pain, and function in individuals with femoroacetabular impingement (FAI). Methods: A total of 20 individuals with FAI completed a 10-week, partially supervised exercise programme; this included three phases of increasing resistance and functionality, consisting of four to six exercises per phase. Hip strength in all six directions; hip pain; function, as measured by the Hip disability and Osteoarthritis Outcome Score (HOOS); and objective physical function, as measured by the Timed Stair Climb test, were determined before and after the intervention. Results: Maximum isometric hip strength significantly increased in abduction (p ¼ 0.008), adduction (p ¼ 0.021), and internal rotation (p ¼ 0.006) at follow-up. Increases in flexion, extension, and external rotation strength did not reach statistical significance. Self-reported HOOS pain (p < 0.01) and activities of daily living sub-scale scores (p < 0.01) significantly improved at follow-up. Timed Stair Climb times (p < 0.001) also significantly decreased at follow-up. Conclusion: A 10-week exercise programme can be safely completed by adults with FAI before surgery, and statistically significant changes in strength, function, and self-reported clinical outcomes can be achieved.

were assessed with an independent Mann-Whitney U-test with significance level p<0.05. Results:Forty-seven patients with hip OA (29 women/18 men) with mean age 59.2 (AE9.5) years and mean BMI 24.6 (AE3.4) and 21 controls (13 women/8 men) with mean age 58.4 (AE 8.9) years and mean BMI 23.88 (AE3.5) were included. The hip OA patients walked significantly slower than the controls (p¼0.002). They further revealed reduced hip extension and knee extension at PKE and TO (p<0.001), reduced total excursion in both the hip (p<0.001) and knee joint (p¼0.004), a smaller hip flexion moment at PKE (p¼0.009), a smaller knee flexion moment at PKF (p¼ 0.009) and a smaller knee extension moment at PKE (p¼0.036). Of the 47 patients, 21 were defined to have severe radiographic hip OA. Compared to patients with MJS!2 mm, these patients had significantly reduced hip extension at PKE (p¼0.029) and TO (p¼0.032). No other differences were revealed. Conclusions:Patients in the early stage of hip OA reveal deviant biomechanical gait characteristics compared to controls, with reduced hip and knee extension during the latter phase of stance as the main feature. More severe radiographic OA enhances the deficits in hip extension during the latter phase of stance.

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