About Abs Workout 8 Minutes Pro: This workout is one of the "hottest" workouts around. How much time will I have to dedicate each day? "Only 8 minutes or less". This is also a new official app are released by App for Best, besides Scientific 7 Minute Workout. Abs Workout 8 Minutes Pro to get a round butt: 1. Jumping squats. 2. Reverse Crunch. 3. Straight-arm plank.