This exercise combines heart-pumping plyometrics with the abs-sculpting power of a plank and tuck movement.
How to do it: Start in a full plank position, feet hip-width apart. Brace your abs in tight, bend knees, and shift your weight into your arms. Jump up, lifting hips up in the air to bring feet into hands, landing in a tuck position on the balls of your feet. Quickly jump feet back out to plank position. That's one rep. Jump in and out as quickly as you can for up to 3 sets of 20 reps, taking a short rest in between sets to catch your breath.