Odpowiedź:
No, you don't have to wear any special clothes. A tracksuit is fine. And you mustn't wear shoes in the class. You must take them off before you go into the class.
Oh, are there any other rules?
Yes, you must listen/have to listen (oba poprawne) to the teacher. And you mustn't talk when he's giving instructions.
Do I have to be very fit to do the class?
Yes, you do! And remember, at the end of the class you must bow to the instructor and say thank you.
