Popsugar Fitness 15-Minute Workouts A 15-Minute Core Workout to Work Your Abs and Entire Core Work Your Abs From All Angles With This Sizzling 15-Minute Core Workout 4 December, 2019 by Maggie Ryan View On One Page Photo 5 of 9 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 Boat Pose Begin sitting on your mat. Bend your knees and lift your feet off the floor, balancing on your tush. Keep the spine long and straighten the legs as much as you can without rounding the back. If this is too hard, then keep the knees bent. Hold for 30-60 seconds. Previous Next Start Slideshow 15-Minute WorkoutsCore ExercisesAb ExercisesBeginner WorkoutsBodyweight WorkoutsAb WorkoutsStrength Training