Popsugar Fitness Workouts Quick Ab Workout The Most Intense 3-Minute Ab Workout September 3, 2017 by Jenny Sugar View On One Page Photo 1 of 3 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Bunny Hop Begin in a plank position with the feet together. Pull your abs in and jump your feet to the right, bringing your knees toward your right elbow. Your torso will twist to the right. Jump your feet back to plank to complete one rep. Repeat on the other side, and continue alternating sides for 20 reps total. Previous Next Start Slideshow WorkoutsStrength TrainingBeginner Workouts5-Minute WorkoutsArm Workouts