Popsugar Fitness Workouts Best Bodyweight Core Exercises Here Are 43 Best Bodyweight Exercises to Transform Your Abs July 28, 2020 by Jenny Sugar View On One Page Photo 35 of 44 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 35 Straight-Leg Sit-Up Begin on your back with your legs straight and arms raised toward the ceiling. Roll up to sitting, focusing on the abs rounding the back. Roll back down to the mat slowly, one vertebra at a time. This completes one rep. Previous Next Start Slideshow WorkoutsStrength TrainingBodyweight ExercisesAb Exercises