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 7 of 11 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 7 Birdog This is a posterior core exercise that will keep you from rounding your spine too much. Get on all fours, with your knees under your hips and your hands under your shoulders. Remember to keep abs engaged and keep your back flat. Reach out with your right hand and extend your left leg out behind you. Round your back and head to connect your right elbow with your left leg under your body. This completes one rep. Previous Next Start Slideshow Trainer TipsFitness TipsCore ExercisesWorkoutsAb Exercises