By the end of 18 holes on Friday, I was getting enough pain in my right forearm that I thought my tennis elbow was going to flare up badly. Thankfully it hasn't gone too badly. It's still a little sore here and there, but hasn't gone badly.
By the end of that round, my middle and ring fingers on my right hand were majorly sore as well. I still don't know why--that's never happened from golf, but then again it had been 5 years since I hit a ball. That took a few days to work itself out.
I'm going to have to start getting into better shape if I start playing again.