The psychological mechanism of Internet addiction is relatively complicated. There are motivational factors such as need, motivation and special personality factors such as depression, loneliness, and self-control. Experts believe that people who exercise have strong self-control. (The content of the topic is missing). Can we know from this? ['Comment on the significance of physical exercise for personality development.', 'Point out the possibility of physical exercise as a network alternative.', 'Explain the value of physical exercise in treating Internet addiction.', 'Explain that physical exercise has the basic function of promoting mental health.']