In addition, there will be a martial arts association in the university (I was an active member of the martial arts association), and you can also practice it, which is also good for fitness and self-defense.
Of course, if you don't practice, you will definitely fall. You won't feel it at first, and then you will shrink back to the day when you feel that your physical strength is not as good as exercise. For example, running, you will feel that you are not strong enough.
There are many ways to keep fit, such as skipping rope, running and jumping in place, including swimming, which are all very good ways to exercise.
In a word, don't worry, you just went to college, and you are not old enough, so the problem won't be very big. In college, the most important thing is your studies. I hope you will succeed in your studies as soon as possible!
Well, my hands are tired after playing for a long time. I hope it helps you.