https://pubmed.ncbi.nlm.nih.gov/34135111/ They had one group alternate day fasting and one not fasting plus a control group alternate day fasting not on calorie deficit The study showed lean mass loss on the calorie restricted fasting group compared to same caloric intake non fasting. And less energy expenditure in fasting group I am trying IF 14:10. It really is not much of a fast but I avoid eating after dinner. Should I be concerned with maintaining muscle? I am trying to lose weight but have stalled.