If you've been reading our blogs and eBooks for any length of time, you know that when it comes to training our players we take a Big Picture look at how the body factors into the golf swing. And it doesn't matter if that player just won $15 million and the FedEx Cup or if he just won $80 bucks and his weekly foursome. If you're looking to play your best, you have to train your entire body to be successful. But while a lot of players may do some quality upper-body training and lower-body training, many may be sabotaging their game by not focusing enough -- or correctly -- on the thing that ties the upper-body and lower-body together: the core.