Belts should be used as a cue to brace your core; they aren’t necessarily meant to be a band-aid for your training in order for you to lift heavier. Belts can cue you to brace your core during heavy lifts and can increase intra-abdominal pressure. On the other hand, they can limit motor learning skills (more so with beginner athletes who need to learn to brace the core.) They serve a purpose in specific styles of training and are not meant for everyone.
Want to learn more about mind-muscle connection? Pop over to my PODCAST page and listen to episode 18!