Popsugar Health & Fitness Bodyweight Exercises Best Bodyweight Core Exercises Your 6-Pack Is Coming, and These Bodyweight Moves Will Make It Happen 13 December 2018 by Jenny Sugar View On One Page Photo 35 of 43 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 Bodyweight ExercisesStrength TrainingWorkoutsAb Exercises