Come into a side plank on your right side, with your feet stacked one on top of the other and your weight on your right elbow with your fingers reaching away from your body, palm down. Squeeze your glutes and visualize your hip bones as laser beams that stay facing forward the whole time.
Visualize a towel under your waist pulling you up toward the ceiling. Open your chest, and try to pull your resting forearm toward your feet. You will feel your lats and obliques engage!
Slightly drop your waist down toward the floor, then bring back up to start position. Repeat 10 times on the right. Then switch sides and repeat 10 times on the left.