Jake Gyllenhaal Did 2K Sit-ups a Day for Movie

Newser / April 22, 2015

Jake Gyllenhaal plays a prizefighter in Southpaw, out this summer—and he went to great pains to bulk up for the role.

He started with three hours of workouts per day and worked his way up to six hours a day; those workouts were split between boxing and strength training/conditioning/cardio. More on the story on Newser