Can I wear loose jeans when I exercise?

I don't think so. Even if jeans are a little looser, their elasticity is not very good after all, and they don't absorb sweat very much. Because it's easy to sweat in physical education class, and jeans are heavy, it's hard not to sweat. It is recommended to wear fit sweatpants and choose soft fabrics with good hygroscopicity. This kind of trousers is flexible and comfortable to exercise, which is very suitable for physical education class.