By Kristen Aldridge
July 21, 2011

Mila Kunis is sexy, sassy, smart and clearly devoted to her roles; she famously shed 20 pounds to play a prima ballerina in Black Swan. But just how did she get that bod prepped to bare it all in those-ahem-super steamy love scenes with Justin Timberlake in her new movie, Friends with Benefits?

Enter celebrity trainer Brian Abercrombie of BODY MAXX, who boasts a slew of professional athletes and high-profile stars on his fitness roster. He trained Gerard Butler to kick some major butt in 300, and I think I can speak for any woman how ah-may-zing he looked. There's no doubt Abercrombie knows his stuff when it comes to all things fitness.

For the past year, Abercrombie has been working with Kunis on a training system called "P.A.S.E" (power, agility, strength and endurance). "The focus is rarely on a specific body part but on the body as a whole," Abercrombie says. "The rest usually takes care of itself."

For Friends with Benefits, Abercrombie increased Kunis' workouts from three days per week to five, complete with well-balanced meals of low glycemic carbs, proteins and essential fats.

"There was a joke in the script about her having no butt. I was determined to make them re-write it," he says. "I don't know if they did, but her butt looked good."

While I don't personally have friends with benefits, I was totally pumped to learn how to benefit my own body with Abercrombie's workout and even more excited to be able to share those secrets with you.

You'll Need: A box/step or other raised surface, a TRX Suspension Trainer, a dumbbell, an olympic bar and a medicine ball.

How it Works: This workout combines strength and endurance, consisting of six movements done in a circuit for 40 minutes with no rest.

STEP 1: Walkover Pushups

How to do it: Start in a plank position with both hands on a box, step or other raised surface. Step off with one hand moving to the floor and one hand remaining on the box. Do a full pushup and then return to the first position and alternate to the other side. Complete six reps on each side.

Tip: If you're a beginner, try these on your knees.

STEP 2: Mountain Climbers

How to do it: Start in a plank position and then pull one foot up and underneath you so that your knee is at chest level. Alternate foot position rapidly, as if running in place. Complete six reps on each side.

Tip: Keep your butt level and don't bounce up and down.


How to do it: Grab the handles of your TRX (palms turned inwards) and walk down into an inverted prone position. With your back straight and ribcage up, pull your hands to your ribcage from the extended position. Complete six reps.

Tip: You can also lower a bar on a smith machine or a squat rack, climb underneath and do the same thing.

STEP 4: Bootstrapper Squats

How to do it: Take the handle of a dumbbell in both hands so that they are in an overlapping baseball bat grip. Straighten your arms and forward fold, keeping your legs straight. With both your arms and legs straight, set your elbows on your knees and maintain contact throughout the motion. As if dragging the weight, drop your butt toward your heels and bring the lagging weight up and under your chin. Still with us? That is one rep. Complete six reps.

Tip: Consult this video if you still need help.

STEP 5: Stir the Kettle

How to do it: Hold an olympic bar with both hands and place one end of the bar on the floor into a corner of a wall. Raise the other end of the bar up to chest level and lean into it slightly, still holding it with both hands. Make a big full circle, as if stirring a large kettle (hence the name). Complete six reps in each direction.

Tip: Use a towel so that you don't damage the wall.

STEP 6: Medicine Ball Slam

How to do it: Hold a non-bouncing medicine ball with both hands over your head. With arms fully extended and feet hip-width apart, slam the ball into the floor. Drop as you go into a full deep and proper squat and catch the ball as it comes off the floor. Bring the ball back to the raised position. Complete six reps.

Tip: If you don't have a medicine ball, a tough basketball or soccer ball will help you learn the movement. Make sure you slam the ball a few inches in front of your feet so the ball doesn't rebound and hit you in the face.

About Kristen Aldridge

Kristen Aldridge lends her pop culture expertise to Yahoo! as host of "omg! NOW". Receiving millions of hits per day, the hugely popular daily entertainment news program is one of the most-watched on the web. As a seasoned entertainment journalist, pop culture expert, fashion addict and lover of all things creative, she is founder of and recently launched her own celeb-inspired fashion line and smartphone app. Connect with Kristen to talk all things celebrity via Twitter and Facebook , or visit her official website at