you may have to seek expert advice.
This might sound odd but it's not my legs that want to give up but my breathing. I think I struggle to get a decent rhythm breathing wise (if that makes sense)
In my defence, I did have a collapsed lung years back and wonder if this is an issue.
My mother is in her mid 60s has lung disease but she still runs all the time. On weekends she often does a run 25km to 30km long on rough bush tracks. She is training for a 50km ultra-marathon at the North Face event in the Blue Mountains. It's one of the toughest ultras around... If she can do this sort of thing then anybody without significant disability can do it also.
Just plan well and stay motivated.... And enjoy it! It's fun.
Edited by Copa, 03 October 2013 - 10:32 AM.