Hell, I'm 23 and have had knee surgery(jumping out the back of a Bradley) and my back gets stiff some times(UH-60 had to make a hard landing in the Sandbox) and I still go jogging every morning, and nearly maxed out my last PT test.
Running away is a good skill to have for a foot soldier.
NRA Life Member
Big Sister: "You should be sponsored by Allen"
Me: "If you can't shoot good, at least look good walking to the firing line."
Big Sister: "Can you not afford a Pelican? Then buy an Allen gun bag."