Ben Affleck is nothing short of a chameleon on screen, whether he’s portraying a harried CIA agent in Argo or suiting up to be Batman in Zack Snyder’s Justice League films.
Of course, it takes more than acting ability to transform from role to role—Affleck has physically made himself over time and time again to embody the characters he portrays on-screen.
Read on to find out the exact diet and workout routine Affleck adheres to in order to maintain his fit physique. And for more on how your favorite stars stay fit, check out This Is Ryan Reynold’s Exact Meal and Exercise Plan to Stay in Shape.
To ensure he’s building muscle but not losing too much weight, Affleck doesn’t incorporate too much cardio into his routine.
In a 2016 interview with Men’s Journal, Affleck’s trainer, Walter Norton, revealed that Affleck usually starts his workout with 15 minutes of cardio at the maximum, either in the form of a quick workout on the elliptical or Airdyne bike sprints.
For more on how celebs tone up, check out Jessie J Reveals Her Exact Butt and Abs Workout.
To bulk up to play Batman, Norton put Affleck through a series of both bodyweight and free weight-based exercises.
These included everything from planks to cable rows to pull-ups to lunges, with Affleck exercising for close to two hours, divided into three blocks.
“We wanted him to be strong but we wanted to add mass. The volume was higher. We lived on a lot of the basics, 80-pound dumbbell curls, heavy-loaded carries, and farmers walks with 60-pound weights,” Norton told Men’s Journal.
According to Norton (speaking to Muscle & Fitness), when Affleck was getting into Batman shape, nutritionist Rehan Jalali designed a very specific diet for the star, including minimal carbs throughout the day.
However, in the mornings, Affleck would kick things off with a combination of oatmeal and egg whites.
Throughout the rest of the day, Affleck kept his carbs to a minimum. For lunch, the star would eat salad with a double helping with protein, then either chicken or fish with cauliflower, broccoli, or Brussels sprouts for dinner.
“We were seeing that in our sleep,” Norton told Muscle & Fitness. “Rehan designed a great diet, and Ben followed it to the letter.”
For more celebrities who’ve gotten into superhero shape, check out Chris Hemsworth Shares His “Ultimate Family Workout” in Hilarious New Video, and for the latest celebrity health and fitness news delivered to your inbox, sign up for our newsletter!