I understand people like to be sarcastic on this message board, so I will take most of the comments with a grain of salt.
Firstly, you don't have to fast while traveling, so during the Olympics, most of the athletes will not fast, making up for it later.
Secondly, it is a time of heightened charity and spirituality. It might be 'idiotic', but if people were more charitable for a month because they believe in some 'invisible big guy in the sky', then so be it.
Thirdly, the question was about fasting during the olympics, not whether God exists or not, or about various races. I find the rather inflammatory comments - even said in jest - take away from the integrity of our sport.
No one has a problem with a person being more charitable because of their religion. We have a problem when they start killing people because of their religion.