It is normal to have narcissism when fitness has a certain effect, but being too single-minded will affect your mood. In fact, cardiopulmonary function is also very important. Many friends who like bodybuilding don't pay much attention to the exercise of cardiopulmonary function, which is not conducive to muscle growth. In fact, sometimes, in addition to fitness, it is best to do more outdoor aerobic exercise, which will cultivate sentiment and promote mental health.