My goal is to lose body fat and maintain muscle but some days I'm fine with eating at a slow deficit and once a week or once every two weeks I feel like fasting for the whole day (just casein with water, no training on that day). Does anyone else do this and is it destroying my hard work? Or does it not make too much of a difference?
I don't want to lose lean mass or at least I'd want the percentage of loss to be at least 80% Fat 20% muscle. My BF is at around 24%