Popsugar Health & Fitness Workouts How Do You Increase Core Strength? I'm a Trainer: If You Want a Stronger Core, These Are the 11 Exercises You Need to Do 24 July 2020 by Tamara Pridgett View On One Page Photo 6 of 11 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 6 Elbow Plank This is an anterior core stability exercise that will help prevent excessive arching of the lumbar spine. Start 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 — don't let it droop or you'll be defeating the purpose. Picture your body as a long straight board, or plank. Previous Next Start Slideshow Trainer TipsFitness TipsCore ExercisesWorkoutsAb Exercises