Hugh Jackman logs serious hours in the gym to stay in superhero shape, but he also credits intermittent fasting to helping him get lean. When he was training for X-Men: Days of Future Past, he followed the 16:8, or leangains, intermittent fasting plan where he ate during an 8-hour window and fasted the other 16 hours. "I feel so much better on it," he told Men's Journal during a 2013 interview. "I haven't put on nearly the amount of fat I normally would. And the great thing about this diet is, I sleep so much better."