Stand with feet hip-width apart, knees slightly bent, hands behind your head and fingers unlaced. Inhale through your nose, then exhale through your mouth and lift your left knee to your left elbow as you contract your abs [shown].
Inhale and lower your leg, then exhale and repeat. Switch sides and repeat. Do 10 reps on each side, building up to 20.
Repeat cardio knee pulls.
Check with your doctor before starting this or any exercise program. If you had a Cesarean section, wait until your incision has healed.