Popsugar Fitness Workouts Bodyweight Back Exercises No Equipment Required: 7 Moves to Tone Your Back October 8, 2015 by Lizzie Fuhr View On One Page Photo 5 of 7 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 Seated Trunk Twist Begin sitting on the floor with your legs stretched out in front of you; lengthen your spine to keep your back straight. Pulling your navel in tight, twist from right to left, lightly touching both hands from side to side to complete one rep. Previous Next Start Slideshow WorkoutsBack Exercises