No, the gym will give you the key to the locker.

I suggest you prepare something for yourself. If you sweat a lot, bring your own towel. If you take a shower, bring your own slippers. Sports shoes, as long as there is not much mud on them.

It is best to wear sweaters and trousers with good air and perspiration, and don't wear cotton sportswear, which will be very uncomfortable after sweating and the perspiration effect will not be good.