Exercise is always great idea, as long as you are fit to do so. Everyone should get at least an hour a day.
My suggestion is to check and see if they have a 50+ league. Those guys are usually just out there for a good time, to meet friends and have a few beers after the game. Very casual games. That way you don't get some 27 year old idiot that played junior in the AJHL reliving his glory days, and trying to take your head off.
I started playing Baseball again this summer at age 46 in a 30+ league, after 27 year layoff. I played slo-pitch during that layoff, but nothing compares to playing hardball. It was fun to challenge myself, and some of these guys could throw pretty fast with pretty nasty curve balls. I had a smile from ear to ear all season. Can't wait for next season.
Good luck!:toast: