The Challenge: Skorochod's determination to get back in shape after having Baby No. 2 has paid off. But while she's on her bike at least 45 minutes three times a week, she's done nothing to improve her muscle strength.
The Solution: A strength-training program that uses a single piece of equipment -- a stability ball -- makes sense for Skorochod. "Not only is a ball easier to store," says Mom Squad fitness pro Sharon Monplaisir, "but you're using more muscles when you're working out to help keep you steady."
The ball routine shouldn't take Skorochod more than 30 minutes, three days a week -- but she can break it up into 15-minute mini-workouts. An upper-body move you can try: Hold the ball at shoulder level against a wall, keeping it at arms' length. Bend your arms to bring your body toward the ball. Hold two seconds and push away. Do two sets of ten repetitions.
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