Plenty of bodybuilders do fasting, especially intermittent fasting. Make sure you get the nutrients you require before and after a fast and combine with resistance training and you have no reason for concern (IANAN)
> Plenty of bodybuilders do fasting, especially intermittent fasting.
I know that they do IF, but do we have examples of bodybuilders that do 3+ day regular fasts? I'm not aware of any. IF can simply be a neat way to calorically reduce, but legitimate multi-day fasting is another beast entirely.