Popsugar Fitness Workouts Best CrossFit Ab Exercises These Are the 17 Best CrossFit Ab Exercises If You Want to Lean Out and Carve Your Core August 5, 2019 by Jenny Sugar View On One Page Photo 5 of 17 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 Burpee Lower into a crouching squat with your hands on the floor. Do a squat thrust by jumping your feet back into a plank position. Do one basic push-up, bending your elbows and then straightening back to a plank. Jump your feet forward to your hands, and come into a squat. Do an explosive jump straight up, getting as much height as you can. This counts as one rep. Previous Next Start Slideshow WorkoutsCrossFit