Popsugar Health & Fitness Strength Training Waist Exercises Here's How to Work and Tone Your Waist 2 May 2018 by Susi May View On One Page Photo 7 of 31 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 7 Star Plank Come into a side plank on the right side. Flex both feet and lift your left arm straight in the air. Keeping your spine lengthened and your abs engaged, lift your left leg up as high as you can without letting your waist sink to the ground. Then slowly lower your right leg back to the starting position to complete the rep. Previous Next Start Slideshow Strength TrainingWorkoutsAb Exercises