When you’ve mastered all of the success points of the single under, you’re set to try your hand at the notorious Double-Under.
Double under is a skip where the rope rotates twice around the body on every single hop.
Do the Pull-Ups. Then do the Double-Unders and Pull-Ups. Then do the Burpees, Double-Unders, and Pull-Ups. Continue this way until the final found of Air Squats, Sit-Ups, Burpees, Double-Unders, and Pull-Ups.