One of the most common faults I see on the lesson tee is incorrect hip rotation during the backswing. This fault produces poor contact, lack of turn, slicing tendencies, inconsistency, casting, and the inability to control trajectory.
Fault: During the backswing the back hip slides out and away from the target causing the hips to lock out and the spine to lean towards the target making it very difficult to return to impact on a consistent basis.
Fix: Turn the hips during the backswing. This will encourage proper weight shift during the transition and allow the golfer to return to impact more consistently.
– by Cam Martens