A confident person is bound to have the courage to persist and face challenges. He can overcome all the problems and difficulties in life. Overcome fatigue and soreness after training. Followed by the benefits of fitness. He saw that he was stronger and in better shape, so he recognized himself more, became more confident and entered a virtuous circle.
However, it is natural that people with low self-esteem are bound to be dissatisfied with their present situation. But in the process of losing weight, some people care about their imperfect self in the past and want to stay away from him. Some people care about a better self in the future and want to be closer to him. This seems to make no difference, in fact, the psychological impact on people is subtle and huge.
So the most important thing is to know yourself. Fitness will help you, but if you don't know yourself, fitness won't help you much.