Start on your hands and knees, and tighten your stomach muscles. Lift and extend one leg behind you. Keep hips level. Hold for 5 seconds, and then switch to the other leg. Repeat 8 to 12 times for each leg, and try to lengthen the time you hold each lift.
5. Bird Dog
Try lifting and extending your opposite arm for each repetition. This exercise is a great way to learn how to stabilize the low back during movement of the arms and legs. While doing this exercise don’t let the lower back muscles sag. Only raise the limbs to heights where the low back position can be maintained.