Loop the middle of the band around your shoulder blades and bring the ends under your arms. Grasp both ends of the band at your chest (a). Step forward with one leg while you push the ends of the band forward (b). Slowly return to the starting position.
Step onto a foam surface for a greater challenge. Vary the angle of the pushing movement.
Tighten your abdominals before and during the exercise. Be sure to keep your back and neck straight as you complete the movement.