The abdominal lift brace with march strengthens your lower abdominal muscles, helping you keep your pelvis and back stable:
Lie on the floor with both knees bent. Put your feet flat on the floor and your arms by your sides. Tighten your abdominal muscles. Be sure to continue to breath.
Lift one bent knee about 2 inches then return it to the floor and lift the other about 2 inches. Keep your abdominal muscles tight and continue to breathe. These motions should be slow and controlled without your pelvis rocking side to side.
Repeat 10 times.