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NinDiGu t1_isbr0it wrote

Reply to comment by persondude27 in TIL that blue whale calves can drink 60 gal / 225 liters of milk a day and can gain up to 8 lbs / 3.7 kg an HOUR. by persondude27

Humans can gain and lose up to 5% of their body weight in a day depending on their intake and exertion.

Professional athletes are on that extreme, and more current trainer care makes it less likely, but American Football Lineman, and professional Hockey goalies can swing up 10lbs/5kg of body weight during a game.

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