Originally Posted by IROC (Post 4107602)

I hear this all the time, but then I show up at a local 5k race and there's a bunch of old people entered that have been running for decades and they're perfectly fine. I'd rather run for the next 40 years and maybe have some knee pain than vapor lock in 20 years from sitting on the couch.

I started running about two years ago (at age 42) and have had zero problems. My advice - if you're going to run, invest in some good shoes and replace them often.