Popsugar Fitness Workouts The Secret to Flat Abs 20 Tips to Uncover Flat Abs June 26, 2018 by Leta Shy View On One Page Photo 12 of 20 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 12 Practice Yoga Give your muscles a good stretch while toning at the same time with yoga. This ab-defining yoga sequence will tone your tummy in no time. Previous Next Start Slideshow Workouts