Yep, golfing is kind of like in the Dire Straits song "Money for Nothing" where they say the worst thing that can happen to the rock guitarist is he might get a little blister on his thumb, but they cart around fridges all day. Couldn't resist ... that just came popping up in my mind. One of my favorite songs and videos.
Anyway, I always do some stretching before any kind of exercise and I think that's really vital in golf. About the worst I've ever hurt myself was a pulled muscle and I think that was because I didn't warm up with enough stretching. Be sure to stretch out your legs too, not just your upper body. You need to have your back loose so you can rotate the lower body when you need to without straining it.
Even if I'm taking a cart around the course, I always stretch out. Probably need it more then because I'm not keeping my muscles warm between holes as much if I'm riding around.
I try to do this before I head out onto the course though - otherwise I feel like a weirdo. But that's just me ... I've seen people stretching out before they tee off. Just don't hold the game up or anyone playing behind you if you're going to do that.
