Do it: Do this workout ladder style. Start by doing 20 burpees in a row, then walk 5 meters. (This short walk is your “rest.”) Immediately do 19 burpees in a row, and then walk 5 meters. Continue doing one less burpee each set until you only do one burpee. The length of this workout depends on how hard you’re willing to go, but it should take less than half an hour. Most people can’t do the entire ladder without stopping at some point. You’ll know you’re truly fit when you can power through the entire routine.