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GET IN A 'ROW'

To achieve her sculpted back and shoulders, Halle Berry goes row, row, rowing – doing dumbbell back rows, that is. "This exercise strengthens the rhomboids, the muscles in your upper back that connect your shoulder blades to your spine, giving you a toned back and much better posture," her trainer, Harley Pasternak, tells Health magazine. "You'll look great in backless dresses, too!" Get a step-by-step guide to doing the exercise on Health.com!