Tap Your Inner Ballerina

■ Do this workout every other day, alternating with a day of cardio exercise, a yoga or Pilates class or an at-home exercise DVD routine.

■ Warm up for 15 minutes by walking briskly, marching in place while doing opposite knee-to-elbow knee lifts, or dancing around the room with your baby in your arms or a front carrier.

■ Cool down afterward for five minutes by stretching your lower back and legs, holding each stretch for at least 30 seconds without bouncing.