There are so many ways to work your abs, but sometimes, you just don't have time for a long, complicated routine. The good news? You can get in a solid abs blast in fewer than 5 minutes. The key is keeping your muscles under constant tension the entire time. Because your abs help you maintain good posture and help with pretty much every movement you do, it makes sense that these muscles have good endurance. In order to work them to the point of fatigue. Why not try this workout and see!