Many people want to shed belly fat, maintain a flat stomach, or tone up their abdominal muscles but can’t seem to find the time. However, giving your abs a thorough workout doesn’t have to be time-consuming. In fact, just five minutes a day is all you need to sculpt six-pack abs with this highly effective workout. The last two exercises in this workout require dumbbells, so you’ll want to have them ready to use before you begin the workout. When choosing the weights of the dumbbells, follow the recommendations below: • For Muscle Size & Strength: Select dumbbells that you can complete between 4-8 reps of the last two exercises with. • For Muscle Endurance…