Popsugar Health & Fitness Workouts Best Ab Exercises 2019 I'm a Trainer, and These Are the Ab Exercises Everyone Should Do More of in 2019 16 February 2019 by Tamara Pridgett View On One Page Photo 11 of 11 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 11 Birdog 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 TipsCore ExercisesStrength TrainingWorkoutsAb Exercises