Reps: 20, alternating legs
- Lie on your back with your hands by your side, with your heels about 12 inches from your pelvis. Press your heels into the floor to come into a bridge position with a neutral spine.
- Press your right heel into the floor, and keeping your knee bent, raise your left leg until your hip is a 90 degrees. Lower your left leg down, pressing through your glutes so your pelvis doesn't drift to the floor along with the leg. This completes one rep; switch sides and lift your right leg for your second rep.
- Do 20 reps, alternating legs.
This exercise helps strengthen the back for good posture, but to keep the pelvis stable you as your march in this position you really need to engage your glutes.