Guys, I don't post on here much but I saw the post about the sledgehammer and tire and synergy athletics. Let me tell you this, as a former strength training athlete at several universities, most coaches would prefer you to do this kind of workout. How do you think men back in the old days such as Romans, Spartans, Greeks, Austrians, Germans are trained? They did hardwork labor and these guys were huge. Lifting weights is great, don't get me wrong, but sometimes you lift so long it gets boring and you start sacrificing form and everything else during your workout. But what I'm saying is to mix it up and the sledgehammer workout would make your twitch muscles even quicker. This type of training is what builds strong forearms, biceps, chests, legs, etc. I can go on and on, I may not know alot about golf but the old style of working out with hard labor is the most effective and you won't tear a rotator cuff unless your an older gentlemen and not in good shape. I've also tried P90X and its a great workout that I would suggest also, it uses your own body weight and basic movement exercises and it works. I added several pounds of back muscle with this workout. But I want to reiterate I'm no coach or trainer, just have experiences. Thanks.