One of the best-built guys I know is a 43yr old coach who does all the P90x and Insanity infomercial stuff. I can tell it takes some work, as he is often seen around town with icebags taped over his joints.
He'll be crippled up real good by the time he's 50.
HAH! Running can really tear you up over the long haul. As I have gotten older, it has been necessary to pace things a lot slower. Longer time between sets, and LOADS more recovery time. Had a real drop off at 52, but at 57, I am still beating the young guys a lot in bench press. Actually had my highest contest bench ever last Sept. 525 @174 bodyweight, 56 years old. Some sports demand a change in approach, but you can still be competetive for a long time. ( injuries, though rare for me, take a LOOOONG time to heal)
