Popsugar Fitness Workouts Waist Exercises Here's How to Work and Tone Your Waist May 10, 2019 by Susi May View On One Page Photo 12 of 31 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 12 Twisted Bird Dog 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. As you extend your right leg out straight, open up your left shoulder for an oblique and back twist. Round your back and head to connect your left elbow with your right leg under your body. Extend right hand and left leg back out for one complete rep. Previous Next Start Slideshow WorkoutsStrength TrainingAb Exercises