In recent years, a wealth of valuable research has been done into hip biomechanics. It is well known that the weakness of certain hip muscles, particularly the hip extensors, abductors and lateral rotators (such as Gluteus Maximus and Medius), and the tightness of other hip muscles, especially the hip flexors, adductors and medial rotators, predispose us to poor lower limb alignment, resulting in torsion at the hip, knee and ankle during loading.

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