The main reason is that the bench press can't fit too much. When practicing chest, most shoulders are injured, and elbows will stop when they reach 90 degrees. I press 100 kg, and my back training is light. Pay attention to your movements when practicing your second arm, or your shoulders will be pulled. Anyway, you can practice how you want. Once your shoulder feels uncomfortable, stop immediately. . . Take time to do anything that will make you successful.
You can use Huimin to gather together.