One must understand in detail the whys and the wherefores. To know in detail the whys and the wherefores is self-awareness. They cannot change their long-established habits. Our country has always stressed literary accomplishment. People blush to wear short clothes.
Students feel that exercise is shameful.
According to my humble observation, this is really their major reason for disliking exercise. Hence there are those who know well that their body needs exercise and, moreover, wish very much to do so, but they cannot. There are those who can exercise only with a group, not by themselves, and those who can exercise in privacy but not in public. In short, all this is due to feelings of shame. All four of these are reasons for disliking exercise.