What that man did at his age was very brave of him; this is what a lot of us as young people might not even have the strength to do.
As much as it was a difficult task he embarked on, I think he stayed determined because he already had a track record of success, and he somehow knew he could replicate same results again.
I think that without the enablements we have in life, experience won't count much. It's like someone who has the expertise in governance trying to contests in elections when his or her body is already frail. So youthfulness is a gift we often underate