Clinical and Functional Outcomes at Least 2 Years After Hamstring Muscle Repair

HamRepair: Clinical and Functional Outcomes at Least 2 Years After Hamstring Muscle Repair

This study is to evaluate functional outcomes of a new, intraoperative lateral positioning of the anchors on the tuber ischiadicum, in comparison to regular anatomical anchoring direct on top of the tuber ischiadicumafter hamstring muscle repair. This study is to quantify at least 2 years postoperative functional, biomechanical and clinical outcomes including side-to-side differences in muscle strength, unipedal balance, gait, jumping and squatting function, muscle activity, in patients treated by hamstring muscle repair.

The design of this pilot study is a descriptive cross-sectional single centre analysis involving all patients previously treated with hamstring repair. All of these patients will be asked to participate in clinical and detailed functional analysis at least 2 years after surgery. Specifically, biomechanical and functional data including isokinetic muscle strength, clinical scores, ROM, joint kinematics and kinetics during walking, running, squatting and single leg jumps, muscle activity and single leg balance ability in the affected and contralateral leg will be collected. These parameters will be compared between legs and correlated with clinical scores.

Inclusion Criteria:

• At least 2 years since hamstring muscle repair

Exclusion Criteria:

• Revision surgery within 6 months before testing on the ipsilateral knee and hip
• BMI > 35 kg/m2
• Previous injury and surgical procedures of the contralateral knee and hip within the last year
• Neuromuscular disorders affecting lower limb movement
• Additional pathologies that influence the mobility of the lower extremity
• Inability to provide informed consent