If you don't go to the library, read books or study, then the range of choices is very wide. You can play basketball, football and do some similar sports to exercise. Of course, this won't take long, nor will it be done at noon. It is a good choice to do it in the afternoon or at night when it is cooler.
Besides sports, we can also take part in some club activities. What clubs like best is to hold activities on weekends. Generally, we will set up some interest groups on weekends to cultivate our hobbies. Let us know more about the content of the club and cultivate our interest in depth. In addition, the club may also organize some small games to play on the playground, or go for a walk in the off-campus park, do barbecue and other catering and tourism activities.
In addition to these, my personal suggestion is that it is best to find a part-time job outside school, so as not to worry about having nothing to do on weekends. In the process of doing a part-time job, you can learn a lot of knowledge, exercise your ability, increase your social experience and cultivate yourself in many ways.
At this time we can learn a lot of knowledge that we can't learn in school. The most important thing is to ease our economic pressure and increase our sources of income. It can also prevent us from doing nothing but studying in college, and it will be more troublesome when we can't even support ourselves after graduating from college.
But I believe most people like to stay in the dormitory and play games on weekends, or lie down all day. There are not a few people who waste their time and college time like this.