Before working out, it is recommended to use your massage gun at a lower frequency with a weaker pressure. If you massage too intensely and deeply before training, there is a risk that you lower your tone, ie the muscle tension/explosiveness that is in the muscles.
Run at the lowest level (1400 rpm) and massage topically around the entire muscle for about 30-60 seconds. This contributes to increased mobility by releasing tension in the connective tissue (Myofascial release). The vibrations also contribute to increased circulation and body temperature in the selected area. With this as a routine, together with a good physical warm-up, you have good conditions for a more effective workout.