With a normal golf swing, physics says that just three things can alter how fast the ball is going to fly off the head of the club. One, predictably, is the speed of the club coming in from the swing.

There are a lot of pretty swings in professional golf, but the guy in the photo (above) has one of the best. If you don't recognize him, it's 2010 British Open champion Louis Oosthuizen.

While there are lots of common golf swing flaws that amateurs make, one of the biggest issues is hanging back — meaning you're not properly shifting your weight, which can cause all sorts of ...