Jennifer Lawrence’s trainer, Dr. Joe Horrigan, has revealed the workout that whipped her into fabulous shape to play Katniss Everdeen. For the actress, who has been very vocal about her eating habits and disdain for exercise, it’s surprisingly intense.

“Jennifer was an utmost professional.” Horrigan said of the hilarious actress. “She was never late. She never missed a workout. She never complained. She did everything that was asked of her and she usually did so with a smile.”

That was clearly some good acting on her part.

Jennifer Lawrence has said in the past, “I’m never going to starve myself for a part. I keep waiting for that one role to come along that scares me enough into dieting, and it just can’t happen. I’m invincible.”

Well, apparently that role did come along.

Her workout consisted of a sensible four-day routine that rotated between cardio, strength training, and yoga. For cardio, Horrigan recommends a five- to 10-minute warm-up before 20 minutes of high-intensity cardio, like “running, cycling (road, mountain, classes, or simply a regular stationary bike), or various aerobic classes such as dance classes and hiking.”

For strength training like Jennifer Lawrence, Horrigan suggests a 20-minute high intensity routine of “bodyweight squats, push-ups and sit-ups” and the like.

On the fourth rest day, Jennifer Lawrence indulged in low-intensity yoga including sun salutations, reverse warriors, chair poses, planks and tree poses to help her muscles relax between those intense workouts.

Seems doable. If Jennifer Lawrence can be like-“At the end of the day there’s probably nothing that makes me feel better than junk food and reality TV.” and “The other day I had pizza for breakfast, buffalo wings for lunch and pizza for dinner. Probably my favorite food is a potato — just a potato, because I like fries, boiled potatoes, mashed potatoes, baked potatoes.”-and then work out and still kick butt as Katniss, then surely the average Jane can make it work!

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