Help my muscles hurt

my muscles hurt whenever i do more than 2 days fry fast, can you give me any suggestion to get rid of it? or do i miss something?

we’d need to know more, about diet, prep, illnesses etc.

A dry fast and any fast really uses up glycogen quickly, and without it, your muscles won’t have the burst and power that you normally have with full glycogen stores. This is a simple explanation, but otherwise there are other possibilities like herx reactions, etc.