Get on your hands and knees, keeping abs tight and your neck straight. Extend your legs behind you and rest on the balls of your feet to form a straight line from head to toes. Bring your right knee into your chest [shown], then return to starting position.
Quickly switch sides and repeat, as if you’re running. Do 10 reps, building up to 16.
Repeat cardio touch downs.
Check with your doctor before starting this or any exercise program. If you had a Cesarean section, wait until your incision has healed.