I went up to Perthshire stalking Reds this weekend and was partnered with an ex soldier who had 30% lung capacity as a result of conflict in an unnamed theatre of war. One lung and the other not in good shape.
Bottom line I couldn't keep up with him on the hill!!! Oh the shame of it!
It proves that the mind is a powerful thing and makes the body overcome all sorts of obstacles.
I am a better person for meeting him.