• Contract your abdominal muscles to engage your core, and hold your baby (or a 10-pound medicine ball) slightly out in front of your chest, with your elbows bent at a 45-degree angle. Be sure to keep your shoulders down and relaxed.

• Swivel at your waist to the left. Hold this position for 3 seconds.

•Swivel back to your center.

• Swivel to your right, holding the position for 3 seconds. Then come back to the center.

• Do 2 to 3 sets of 5 to 10 repetitions.

Plus: Fun tunes for your workout playlist

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