Copenhagen Plank Abdominal Crunch

Start in a side plank position with your elbow under your shoulder and your forearm perpendicular to your body. Utilize a bench or a box that has a hollow space below it and isn’t solid so that the bottom leg can go through the bench/box while remaining straight. If this is not an option, feel free to bend the bottom leg as long as the top stays straight. Place your top foot on the bench and use the strength of your inner thigh, groin, knee, quads, and core to hold yourself up while you actively crunch your bottom knee to your top elbow. Time your breathing so you can breathe out and contract your abs harder.