Hip adductor length: Also tests for abdominal weakness. The subject is in supine position, with feet on the treatment table and posterior pelvic tilt. The knees are slowly brought down, abducting the hips. With adductor tightness and abdominal weakness, the subject is not able to maintain the position and anterior pelvic tilt is noticed (Norris, 1995). When there is adductor tightness, the gluteus medius and hip external rotators may experience reciprocal inhibition, causing muscle imbalance and modified movement pattern (Page et al, 1997).