Is it because as players they need to take alot of calories as burning off so much energy .Also injuries sustained during playing careers makes exercising in retirement much harder. At least professional football players get hugely compensated for that. The poor old GAA players having to pay for and deal with old injuries from their playing days and they never received any pay for it. You see so many crocked and overweight former gaa players in their 40s and 50s with chronic bad knees and hipsDitto for Maradona and The Ronaldo. I suppose you're alluding to Ronaldo's weight trouble. A lot of ex-players have that problem.