“The real utility of using blood flow restriction is the fact that you can use it with very low loads…we’ve tried to combine it with high loads and in different aspects, and other people have run training studies with it, but it’s not additive; it doesn’t add anything more to high-low training” – Jeremy Loekenne
“If you have the aspiration of kicking ass when you’re 85, you can’t afford to be average when you’re 50.” —Peter Attia
“If you are interested in longevity, if you are interested in playing with your great grandkids, you want to prioritize muscle mass. Never in the history of civilization has a 90 year old said, ‘I wish I had less muscle.’” —Peter Attia
But in the short-term (at least up to a week for most people), I believe you can maintain muscle mass while fasting, particularly if you’re resistance training.