Freshman 15 is a real thing! You could go from being your schools top athlete to having late night food runs 5 out of the 7 days. With all your classes who has time to work out, or even try to eat food that is healthy for you. By Christmas break when you get home you will soon realize that your clothes do not fit how they used to, they might be a little more snug or squeeze all the wrong places. Spring semester will roll around and when you thought you would be great at sprints for track you will find the only thing you like to do is sprint to the refrigerator.
Even though its almost inevitable that you will gain weight it might not be a bad thing to stop going to your local late night cain at 2 a.m. after you have already downed a 32 oz soda.