>>738
No one loses a significant amount of muscle fasting unless you go for extreme length (weeks instead of days). Working out while fasting decreases muscle loss even further. Just don't expect to put any muscle on, training while fasting is for maintenance and further fat loss.
As far as eating goes, I've actually been eating a lot of carbs, mostly due to temporary poorfaggotry. I just started on keto today though, to make fasting easier. Switching between carb heavy diet and fasting is brutal and I don't recommend it.