What do boys wear in the gym?

I think since we are going to the gym, we should of course wear some fitness clothes, that is, we can wear short-sleeved fitness shirts on sporting goods. You can wear some fitness pants on your lower body. Now, boys have a lot of sporting goods and clothes. They do all kinds of fitness activities and have all kinds of fitness clothes, such as running. They have running pants, shoes and clothes. There are all kinds of riding clothes to wear if you ride a bike. I think it's enough to wear a sweatshirt and shorts if I just practice equipment.