THE ROLE: Counter-intelligence agent Shana "Scarlett" O'Hara.
THE WORKOUT: Nichols worked with her longtime trainer Valerie Waters to get into fighting shape for 'GI Joe.' For the four months leading up to filming, Waters replaced Nichols's regular routine with three weekly full-body circuit workouts she calls, "Action Hero Babe." See below for details! Workout Plan
Nichols' workout circuits were each made up of 4-5 exercises that work arm, core, leg and back muscles. "It was very specifically designed to add a little more muscle than usual," says Waters. "We wanted her to look believable pulling off the action, but still stay super sexy."Read MoreLess