There are many kinds of super groups, but the significance is to train the same muscle to practice from different angles, for example, I push the inclined plate and I push the flat plate, or practice a group of antagonistic muscles, such as biceps brachii and triceps brachii. There is also a pre-fatigue training method, which is to practice one joint first and then two joints, such as dumbbell bird and I push, which is this.