Star Secret:Strengthening the backside of your body is so important, especially for a new mom like Jessica Simpson who may be breastfeeding, says explains trainer Harley Pasternak, who’s shaped up such stars as Lady Gaga and Alicia Keys. Larger breasts post-pregnancy can pull the shoulders forward, tightening and closing the muscles across the chest. Simpson does this move during their circuit workouts to develop a strong back to balance her chest and improve her posture. And the movement of the row itself helps open up and stretch the chest. “Nothing gives you better posture while simultaneously elongating your midsection than a back row,” says Pasternak. “Additionally, it will really tone your back muscles -- great if you want to wear a backless dress!”
Stand with your feet together, your shoulders back, your abs tight and each hand holding a 3 to 5 pound dumbbell at your sides. Take a large step forward (approximately 2 feet) with your right leg, slightly bending your right knee but keeping your left leg straight while allowing your torso to angle forward about 40 degrees as you reach your hands towards either side of your knees. Then, holding this lunge position, pull your elbows back (keeping them close to your body) to bring the weights towards your hips squeezing your shoulder blades together as you move. Hold the “up” position for two counts before slowly releasing the weights back down towards your knees. Repeat 30 times.