Dakota Johnson's Trainer Reveals the Exact Workout She Did For Fifty Shades Freed

Two sets of core, and you're all done.

• Begin in a side plank, holding a dumbbell in your top hand, arm extended upward.
• Rotate toward the mat as you lower your arm, and reach it beneath your body while lifting your hips as high as you can.
• Return to start to complete one rep.
• Repeat 10 reps on each side to complete a set.
• Complete two sets.