* The gluteus medius contributes approximately 70% of the abduction force required to maintain pelvic leveling during single leg stance.
* Hip abductor strength is the single greatest contributor to lower extremity frontal plain alignment during activity.
* There is no “typical” presentation for hip abductor weakness, but the problem must be considered in any patient with lower chain symptomatology, particularly those with hip tendinopathy, greater trochanteric pain syndrome, iliotibial band syndrome, patellofemoral pain syndrome, ACL injury, medial knee pain, and lower back pain.
*Hip abductor weakness is often accompanied by lower crossed syndrome – a larger pattern of biomechanical dysfunction involving weakness of the abdominal wall and hypertonicity in the hip flexors and paraspinal musculature. Evaluation should include a relatively global assessment of lumbopelvic muscle and joint function. Additionally, clinicians should assess for the presence of foot hyperpronation in patients with hip abductor weakness.