Emma Stone Put on 15 Pounds of Lean Muscle With This Workout

Ever wonder how less-than-athletic actors get fit enough to play these famous champions in movies? Thanks to Emma Stone's trainer, we now have a little more insight into the process.

For her upcoming role as tennis star Billie Jean King in Battle of the Sexes, Stone had to get in major shredded shape. Trainer Jason Walsh said Stone loaded up on strength training, even becoming a bit of "a meatheat" during her transformation.

While Walsh was quick to note that Emma's insane success of putting on 15 pounds of muscle during her training was due to a combination of both resistance training and cardio, one got Emma more excited than the other.

"Every client I’ve had, including Emma, finds strength training addictive," he told Glamour. Stone wasn't just lifting a few weights, either. Walsh said he had her pushing around a 200-pound sled and deadlifting 185 pounds, just to name a few totally casual everyday activities. "Emma was good at deadlifts, which are hard!" Walsh said.

Is there anything she can't do?

Stone's intense workouts were rounded out with cardio. Walsh advises doing half as much cardio as strength training, as a rule of thumb, plus lots of squats. Though he advises that "to build muscle, strength needs to be the foundation of your workouts," Walsh also had Emma running and logging some serious time on the climbing machine.

But the most important part of the entire training regimen might not be what you'd expect. It was the after-workout protein drinks that really made her transformation come to fruition. Walsh notes that protein is an essential part of rebuilding your muscles after a tough workout, so it's a must-have for recovery and recharging your body.

For those looking to get fit like Stone, these are actionable tips you can add to your own fitness routine. And while we don't advise jumping into triple-digit lifting without a lot of lead-up (and maybe a personal trainer), Walsh's tip for building strength twice as much as you do cardio is a good one.

And most of all, don't forget that after-gym protein boost! Here are some of our favorite ways to make sure you're getting enough.