When you find that you are loading and unloading 45 pounds plates- it might be time to invest in one of these products. They are generally used when heavier weights are involved, such as squats, deadlifts, and clean and presses. Some find that they can also be beneficial in maintaining good form for other exercises as well, such as bench presses- because it keeps you focused on your core. And when you have a tight and strong core- all of your reps will be just a little bit easier. If you notice the points where your form starts to get slopping on your sets- is the core that always seems to crumble first. A good belt will always keep your core engaged.