Comment by learc83

Michael Phelps directly says in one of his auto biographies that he was eating 8-10k calories a day. I don’t think you can call that a rumor.

Of course he could be off a bit, but it seems unlikely that he’s off by a factor of 2.

He lists the foods that he ate, and it definitely sounds like it was close to 10k calories. His coach also discussed his diet, and backs up his claims.