Which muscle weakness is a contributing factor to patellofemoral pain syndrome?

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Hip abductor weakness is indeed a contributing factor to patellofemoral pain syndrome (PFPS). The primary role of the hip abductors, particularly the gluteus medius, is to stabilize the pelvis during activities such as walking, running, and jumping. When these muscles are weak, there can be a loss of stability in the hip joint, leading to excessive internal rotation of the femur during weight-bearing activities. This altered biomechanics can increase the lateral tilt and position of the patella within the femoral groove, which may lead to increased stress on the patellofemoral joint and result in pain.

Moreover, hip abductor weakness can indirectly affect the alignment of the knee joint, leading to compensation patterns that exacerbate symptoms of PFPS, including increased loading and wear on the cartilage of the patella. Strengthening exercises targeting the hip abductors are often a critical component of rehabilitation for individuals with PFPS to improve pelvic stability and consequently reduce knee pain.

The other options highlight various musculoskeletal factors; however, they do not specifically address the primary biomechanical instability caused by hip abductor weakness in the context of PFPS.

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