Following hip arthroscopy for femoroacetabular impingement syndrome (FAIS) decreased hip muscle strength for adduction, extension, flexion, and external rotation including impaired functional performance have been observed. However, no studies are lacking on more demanding muscular and functional parameters such as hip muscle rate of force development and reactive strength index. Information on such muscular properties following hip arthroscopy for FAIS may help guide future planning of post-operative rehabilitation strategies. This is a cross-sectional study with an embedded prospective non-randomized study. The aim of the cross-sectional study is to investigate hip muscle function and functional performance in patients who have undergone hip arthroscopy for FAIS during the preceding 6-30 months. The aim of the prospective non-randomized study is to investigate the effect of a 12-week structured and supervised physiotherapy-led intervention aiming at improving hip muscular function on self-reported hip and groin function including hip muscle function and functional performance. Forty-five subjects from the Capital Region with an age of 18-40, who have undergone a hip arthroscopy for FAIS during the last 6-30 months, will be included in the cross-sectional study. Additionally, all included subjects will be offered to take part in the prospective non-randomized study consisting of 12 weeks of supervised and structured physiotherapy-led treatment. The below measures will be obtained at baseline, and at 12-weeks follow-up if subjects are included in the prospective study. All testing, and supervised physiotherapy-led treatment, will be performed at Hvidovre Hospital: 1. Hip muscle function 2. Single leg jump performance 3. Self-reported hip and groin function 4. Evaluation of return to sport 5. Evaluation of satisfaction regarding usual-care post-operative rehabilitation
Study Type
OBSERVATIONAL
Enrollment
45
The cross-sectional evaluation will involve assessment of: 1. Hip muscle function 2. Single leg jump performance 3. Self-reported hip and groin function 4. Evaluation of return to sport 5. Evaluation of satisfaction regarding usual-care post-operative rehabilitation The exercise-based treatment will involve criteria-based physiotherapy aiming at improving muscle function around the hip and trunk.
Testing and exercise-based intervention will be conducted at Hvidovre Hospital
Copenhagen, Denmark
Peak force
Peak isometric hip torque (Nm/kg) of abduction, adduction, extension, and flexion
Time frame: Baseline (week 0)
Rate of force development
0-100 ms and 0-200 ms rate of torque development (Nm/s/kg) of abduction, adduction, extension, and flexion
Time frame: Baseline (week 0)
Self-reported hip and groin function (subjects included in prospective study)
Obtained using the Copenhagen Hip and Groin Outcome Score (HAGOS); Scale from 0 (extreme hip and groin problems) to 100 (no hip and groin problems)
Time frame: Baseline (week 0) and follow-up (week 12)
Single leg jump performance
Reactive strength index obtained during a single leg drop jump test
Time frame: Baseline (week 0)
Self-reported hip and groin function
Obtained using the Copenhagen Hip and Groin Outcome Score (HAGOS); Scale from 0 (extreme hip and groin problems) to 100 (no hip and groin problems)
Time frame: Baseline (week 0)
Return to sport
Obtained using a return to sport questionnaire; Scale: Preinjury sport at preinjury level vs. not preinjury sport at preinjury level.
Time frame: Baseline (week 0)
Satisfaction regarding usual-care post-operative rehabilitation
Obtained using a questionnaire; Scale: Satisfied with regular post-operative rehabilitation vs. not satisfied with post-operative rehabilitation.
Time frame: Baseline (week 0)
Change in Peak force (subjects included in prospective study)
Peak isometric hip torque (Nm/kg) of abduction, adduction, extension, and flexion
Time frame: Baseline (week 0) and follow-up (week 12)
Change in rate of force development (subjects included in prospective study)
0-100 ms and 0-200 ms rate of torque development (Nm/s/kg) of abduction, adduction, extension, and flexion
Time frame: Baseline (week 0) and follow-up (week 12)
Change in Single leg jump performance (subjects included in prospective study)
Reactive strength index obtained during a single leg drop jump test
Time frame: Baseline (week 0) and follow-up (week 12)
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