You can add power to your golf swing from increasing your hip rotation. A fast and full hip rotation adds club-head speed which translates to increased distances to your shots. A good example of someone who has excellent hip rotation is Rory McIlroy. He is a man of average stature – 5′ 9″ and 161 lbs. But hits the ball far and at speeds of around 175 mph.
Rory has a hip speed which is 25% faster than most other professional golfers. His hips rotate 720 degrees per second on the downswing. Other professional golfers average about 550 degrees per second and most amateurs 300-350 degrees per second.
Faster hip rotation = longer driving distance!