My brother Nick is a pretty fit guy for someone in his mid-40s, and although he goes to the gym fairly regularly and looks fit, when it comes to golf, he isn't fit at all. He still hasn't come to the realization that in order to play your best golf, you actually have to be in shape, too. But is golf fitness training really that important?- Take one look at some of the best golfers on the pro tour today. You will see that they aren't nearly as overweight as they once were, and it is a t...