Justin Theroux showed off his particularly lean and chiseled physique in the HBO series The Leftovers. In addition to rigorous workouts with trainer Jason Walsh of Rise Movement, Justin also cut out sugar and practiced a form of intermittent fasting.
"I stay away from diets, but I like to do a little intermittent fasting with Justin," Jason told Men's Journal. "For two or three weeks he stops eating after seven at night, until seven in the morning. So that is about a 12-hour fast. Then we add amino acids at night. He has a lot of success with that."