retirement

Your days as a trainer and coach will come to an end eventually, so what will you do next?
I’ve always been fascinated by the athlete who doesn’t know when to say “when.” I thought about this recently watching a Jens Pulver documentary, but it's a recurring theme in sports.
We here about athletes coming out of retirement to make comeback all the time. Why do they do this? Is it actually a good thing? And might we consider it ourselves as we get older?