Once most of us get old enough to realize we're not indestructible after all, it's time hang it up .. lol
Even more than the loss of the indestructibility comes the realization that things just don’t heal as fast or as “right” as they used to. At 51 I had to get surgery to remove the bone spurs, calcium build up and scar tissue from my miss spent youth (Infantryman). Took the better part of 8 months to stop hurting from the surgery. Now I can look forward to three months of trying to regain the muscle tissue that I lost.
sigh, sux to get old