“I feel so much better now.

When you feel strong, it changes everything your posture, the way you walk.

I look at photos from five years ago and think, Whoa, I was too skinny.”

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“Alison would be jumping off ropes and landing on people and flipping.

I wanted to get her resilient so she didn’t launch the risk of injury,” he said.

“The producers asked me to gain 10 pounds of muscle.

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I gained 19 pounds of muscle.

I started at 110 and went to 129.

And for do that, I had to eat 210 grams of protein a day.

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Jane, Demi Moore famously got in such peak physical condition that she was able to doone-armed pushups.

It was literally absurd.”

“I learned to load clips, change mags, check out a room upon entry, verify kills.

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It was very vicious stuff.

Still, the grueling training still wasn’t enough to satisfy her trainer.

But I have a son who needed me too.”

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Jolie clearly got a taste for pushing herself to the limit.

When we started filming, we trained during lunch breaks or on the weekends."

All together, Saldana spent awhopping 18 monthspreparing for this role.

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Natalie Portman

How intense was Natalie Portman’s training regimen forBlack Swan?

Fortunately, the actress' misery had company; her co-star Mila Kunis had to endure asimilarly grueling routine.

Training so intense you’ve got the option to’t even talk about it?

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This little thing?'

but she has incredible will power and was willing to go the distance."

Learning to use a sword it’s a pretty amazing feeling to be able to do that."

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Oh, I’m hitting somebody’s throat right now.'"

And considering who her fitspiration was, Ferguson’s goals weren’t exactly easy to attain.

“I’ve actually never felt so pure as I felt during this filming.”

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It’s hardcore, but it’s worth it.

The feeling of being able to kick with greater strength each day is empowering."

“I just found it pretty strange to end a routine by punching someone in the face!”

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We wake up, we do kung fu, we brush our teeth.

I’m not a wushu champion.

I was an athlete when I was a kid.

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I was a swimmer and a runner, but all this action stuff is such a challenge."

Rodriguez worked so hard that she was virtually unrecognizable .

“My shoulders puffed out,” Blunt revealed toWomen’s Health.

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“My back looked like there was a barrel of snakes in it.

I had an eight-pack!”

Since then, the actress loves taking on roles that require intense pre-production training.

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I’m also really tall and a girl.

That tends to make you look like you’re Big Bird."

“Having to cut one of the teeth out and root canals.

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You want to be in your best fighting shape, and it’s hard,” she said.

And it looks real, she shared, because in many ways it is.

“When you see the action, it’s like ‘Oh, that’s fine.

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I can do that.’

It doesn’t look too dangerous,” she said.

“My body is bruised and tired but the process was sooooooo EXCITING!!!!

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I amazed my dang on self on this one!!!!”

No wonder her trainer described her arms as “underdeveloped.”

Vikander ended up adding 10-12 lbs.

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of muscle, which helped her better fill out Croft’s trademark tank top.

This new and improved physique would be short-lived however.

“It takes three weeks for you to lose it all,” Vikander toldThe Graham Norton Show.

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“I thought I was going to stay like this.”

And there was an extra spring in her step, too.

“I get to jump higher than I thought I could jump,” she said in theColliderinterview.

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“I get to roll backwards, which I thought I would never do after the age of 8?

So it’s been fun.”

(C’mon, you didn’t really think Margot Robbie could land that, did you?)

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But not all of Robbie’s skating scenes involved Hollywood magic.

She trained on the icethree times a week for three monthsand learned five routines in all.

Gillespie toldPeoplethat’s actually Robbie turning and spinning when she comes out onto the ice during the end sequence.

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“Sarah Kawahara, who actually choreographed for Nancy Kerrigan, was training me,” Robbie toldWonderland.

I soon realized that I’d just been running on ice, and now there was no padding.

My alarm would go off at 5:30 a.m. and I’d want to cry.

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Sometimes after sessions I’d get back into the car and weep."

Those tears of frustration eventually turned into tears of joy.

Robbie’s performance as the disgraced skater earned her an Oscar nomination.

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The caption reads “Deadlift PR day.

So in other words, Stone got her butt handed to her during training.

When she trained forLa La Land, we worked out three to four days a week.

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WithBattle of the Sexeswe did five days a week and sometimes two times a day.”

Stone trained for three months and put on 15 lbs.

of musclefor the role.

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… You feel like the Hulk, a little bit."

Her preparation also included tennis lessons, sometimes with King herself.

Good thing the film hadstunt doubles on set for the tennis scenes.

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“I feel like I went to school,” Mara toldMTV.

I just feel like I learned so much.

And that’s kind of the most incredible part about my job …

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The kickboxing was more so because she felt self-conscious about the nude scenes (who wouldn’t?)

and wanted to get in shape.

Michelle Pfeiffer

Michelle Pfeiffer’s first day of filmingBatman Returnscould not have gone much worse.

She told theHollywood Reportershe smacked her whip trainer in the face “with the whip and it drew blood.

It completely shattered me.”

“She was better than her stunt people,” director Tim Burton toldRolling Stone.

“She made the whip beautiful, kind of an art form.”

Or, was Pfeiffer’s most impressive feat squeezing into Catwoman’s suffocating rubber costume?