Popsugar Fitness Workouts Ab Exercises For a Bad Back If You Have a Bad Back, Trainers Recommend These 11 Ab Exercises For Strength and Support August 6, 2019 by Maggie Ryan View On One Page Photo 6 of 12 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 6 Anti-Extension: Elbow Plank Get face down on the floor resting on your forearms and knees. Push off the floor, raising up off your knees onto your toes and resting mainly on your elbows. Contract your abdominals to keep yourself up and prevent your booty from sticking up. Keep your back flat and glutes tight. Hold as long as you can. Aim for 20 to 30 seconds in the beginning, and work your way up to one minute as you get stronger. Previous Next Start Slideshow WorkoutsAb WorkoutsBack PainInjury PreventionAb Exercises