I'm not sure if it doesn't happen much or if people just don't admit to it on a public forum. The only one I know who's had this problem, to the point at which he gave up cycling, is Wigsie. Even he dressed it up with some nonsense about how it was a bad back etc.
Sadly this solved one problem and created a new one. He'd started to become 'buff' via the cycling and so was in demand in the bedroom. Then couldn't perform so the cycling had to go, but then he went 'lardy' again so the demand in the bedroom tailed off. Some people are just destined to be one of lifes unfortunates