Over three hundred pros use this method, including Curtis Strange, Hal Sutton, who won the Tour Championship and Jasper Panavick who just won the Phoenix Open. We focus on using the full body. You don't swing a bat with your hands and wrists. You use your forearm and body. It's the large muscles rather than the small.
Every good instructor looks at the set up and goes from there.
We feel the body starts the swing. We work to get the big muscles going more than the small ones. Miller says he tries to teach golfers what they need to know to correct their mistakes. You're not going to learn from a good shot. You appreciate them.