Popsugar Fitness Body Weight 32 No-Equipment Ab Exercises You Can Do on a Mat Heat Up Your Core With 32 Small-Space, On-the-Floor Ab Moves You Can Do Right on Your Mat 31 March, 2020 by Maggie Ryan View On One Page Photo 15 of 32 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 15 Side-Plank Crunch Begin in a side elbow plank with your left elbow down and your right hand behind your head. Keeping your torso stable and your waist lifted, bring your right leg up toward your shoulder to lightly tap your right elbow. Lengthen your right leg back to the starting position to complete one rep. Do as many reps as you can in 30 seconds and then switch sides for another 30 seconds. Previous Next Start Slideshow Body WeightBodyweight ExercisesCore ExercisesAb ExercisesWorkouts