Staying active doesn't mean being a gym meathead working out twice/day or for 3 hours at a shot. 3-4 days/week for 30-60 minutes/workout would probably yield desirable results.

See all the posts about people having trouble sleeping? I realize there could be a number of different reasons, but I would think some exercise definitely helps get a better night's sleep.

I have had B&M sessions of 12+ hours straight. Not recommended, but I attribute the ability to play for stretches to:

1) my patience
2) my fitness