Every great golfer I've known has had powerful forearms. You can't play the game at the highest level without them. Tiger has terrific forearms. Nicklaus' were tremendous. The best I saw belonged to Doug Sanders. He was just a medium-length hitter, but his backswing was extremely short, and it was incredible how much speed he generated with his forearms--the right forearm in particular. When he flexed that thing, it was like touching granite. The good news is, you can develop them. Squeezing and relaxing the steering wheel while you drive will help. So will squeezing a rubber ball while you watch TV. Strong forearms can take you a long way in this game.