Popsugar Health & Fitness Workouts What Are the Best Ab Moves? The 50 Best Moves to Strengthen and Chisel Your Core (Plus a Bonus 10-Minute Workout Video!) 14 September 2018 by Jenny Sugar View On One Page Photo 1 of 51 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Mountain Climber Sliders With the towels under your feet, start in a basic, straight-arm plank position. Then, as if you were actually running, pull one knee toward your chest, dragging your foot on your "slider" along the floor. As you push that leg back, pull the other knee forward to complete the rep. Keep "running" in place for 24 reps or 30 seconds. Previous Next Start Slideshow WorkoutsAb Exercises