This exercise targets the gluteus medius and is effective especially in those with an anterior pelvic tilt.

If the abs are not properly engaged, the spine can easily hyperextend and go into anterior pelvic tilt.

Anterior pelvic tilt is when the front of the pelvis drops and the back of the pelvis rises.

On the upswing, the abdominal muscles are engaged to slightly arch the body and prevent anterior pelvic tilt, which adversely affects the strength of the swing.

Imbalance of the muscles can lead to an anterior pelvic tilt, increased hip flexion, and lumbar hyperlordosis of the lumbar spine.

Causes: 1) Anterior pelvic tilt is caused by increased lumbar lordosis and thoracic kyphosis, stretched abdominal muscles, tightened hip flexors.

Such shortening can lead to increased anterior pelvic tilt and lumbar lordosis (unilateral shortening), and limitation of hip extension (bilateral weakness).

Some dancers will use an anterior pelvic tilt (shortening the hip flexors) because hip flexion reduces the tension on the ligament and allows lateral hip rotation to occur more easily.

MAIN OUTCOME MEASURES: Static and dynamic peak hip extension, peak anterior pelvic tilt, and other peak kinematic and kinetic variables during the gait cycle.