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Pain of the anterior hip can have various causes, such as incorrect hip alignment, abnormal movement control, and muscle imbalance.1,2 Sahrmann investigated patients with anterior hip pain based on movement system impairment (MSI) and associated their pain with femoral anterior glide syndrome (FAGS).3 Patients with FAGS experience anterior hip pain when performing hip flexion, extension, and rotation. Most cases of hip pain are caused by movement impairment, which results in muscle imbalance.2,3 During normal hip flexion, a slight posterior glide normally occurs at the femoral head. The posterior glide of the femoral head steadily maintains the path of the instant center of rotation (PICR) of the hip.1 However, the posterior glide of the femoral head does not occur appropriately during hip flexion in patients with FAGS, causing inguinal impingement or anterior hip pain.3,4 The pain and impingement phenomena in hip flexion are caused by movement impairment due to incompatibility of muscle actions. In the hip flexor, imbalance between the iliopsoas and tensor fasciae latae (TFL) muscles occur. Both muscles have the function of hip flexion; however, the TFL is a muscle that performs flexion, abduction, and internal A Movement-System-Impairment Approach to the Evaluation and Treatment of a Patient with Femoral Anterior Glide Syndrome: A Case Report