There Will Be Sweat

Probably some blood too. No tears though. Never tears.

Dan Betz's training log.
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He had no need to be strict with himself, as he had very quickly been brought down to the required light weight; but still he had to avoid gaining flesh, and so he eschewed farinaceous and sweet dishes.

—Leo Tolstoy, Anna Karenina

See? Tolstoy knew the deal in 1873 - starch and sugar makes one fleshy.