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O-type people are also very strong both physically and mentally. They always like to be in a non-stationary "active period" state. O-type people are good at setting goals and working hard to achieve them from the beginning to the end, because they are more able to enjoy the sense of satisfaction and fulfillment they experience in the process of trying to achieve them. For O-type people, the feeling of being noticed and valued is very important, and it is directly linked to their self-confidence. Therefore, if lack of exercise or malnutrition leads to a decrease in physical strength, it will directly affect the self-confidence index of O-type people. This is the point that they are most unwilling to accept.