Attach a pair of resistance bands to a door anchor and place the door anchor at shoulder height on a door. Attach the workout bar to the other ends of the resistance bands. Stand facing away from the door and get into the band loop. Position the bar mid-chest height with elbows angled behind. Take one pace forward in lunging posture (one leg bend in front and other straight behind). Lean into resistance.
Push the bar forward until arms are extended. Return to original position until slight stretch is felt. Repeat.
Range of motion will be compromised if grip is too wide.