Popsugar Fitness Workouts Ab Exercises From a Barry's Bootcamp Trainer A Barry's Bootcamp Trainer Shares Her 5 Best Moves to Strengthen and Sculpt Your Core September 1, 2019 by Lesley Chen View On One Page Photo 2 of 5 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 2 Banded Full-Body Sit-Up Grab a medium to light resistance band with both hands. Wrap the band below a bench, or if you don't have a bench, sit on it to keep it in place. Bring your knees to your chest, balancing on your tailbone in a boat pose. Press your arms and legs apart slowly, pushing the band back behind you as you fully extend your body. Once you've fully extended, tighten your abdominal muscles, drawing your belly button toward your spine, and return to boat pose. Do three sets of 10 to 15 reps. Previous Next Start Slideshow WorkoutsCore ExercisesTrainer TipsAb Exercises