You don't have to think that this must be a training sportswear. Your upper body can be casual. As long as it doesn't affect your swing arm, it is very important to swing your arm when running. You can only wear ordinary clothes in class, wear sweatpants outside, and take off your wool pants or cotton pants in the dormitory or toilet before training. Winter training is very important for athletes. If you practice well, your grades will improve a lot next spring, mainly in cardiopulmonary function. It is recommended to practice long-distance running, but you must stick to it. Be sure to exercise before strenuous exercise, or you will get hurt easily. Physical exercise is a very hard thing, if it is not from the heart, it is difficult to stick to it. I have practiced track and field for five years, and now I feel that it was very fulfilling and happy at that time. I hope you can find happiness in training.