"Hell, you'd have to be an Olympic or professional athlete to come even close to needing more than 5000 calories in a single day." Here is the short article ab

"Hell, you'd have to be an Olympic or professional athlete to come even close to needing more than 5000 calories in a single day." Here is the short article about Michael Phelps and his diet. Supposedly he eats 12K calories per day. http://sports.yahoo.com/olympics/beijing/blog/fourth_place_medal/post/Michael-Phelps?urn=oly,100671 http://sports.yahoo.com/olympics/beijing/blog/fourth_place_m... An ultra-maraphon runner Dean Karnazes provided a sample diet for a day when he runs for the whole 24hrs in his book. I think it was about 26K calories. These are the extremes, of course, but not impossible.