Tiger Woods is 6 feet, 2 inches tall, weighs 180 pounds and purportedly has a 29-inch waist. Oh, yeah, he has 20 yards on the average tour player off the tee. Here are several power keys and the tools of his trade.
You can see the same small, dark grass area next to the hips when Tiger is at the top of his swing and at impact. Amateurs often push their hips toward the ball on the downswing, which inhibits a free-flowing swing and forces you to alter your path. Tiger rotates his hips, and has maintained the same distance from the ball on his downswing that he had at the top.
Here's how to get a feel for rotating your hips toward the target as opposed to sliding them out. Stand your golf bag behind you and press your butt up against it as you take your address. Now hit balls while maintaining contact with the bag at all times. Your right cheek should be in contact with the bag at the top, the left cheek in contact at the finish.