If you just want to run, then ignore the first one.
If you just want to try and don't want to buy something else to be cheated, it's easy. Generally, the coach will ask you to do the body side, and then sell his private lessons when you are finished. That's expensive. Just don't go to class. He will say that it is useless for you to practice like this, and it is easy to get hurt. Ignore him, but if you haven't practiced equipment, be careful. You'd better ask the old members next to you to practice again or you'll really get hurt. More disgusting coaches will continue to sell sports supplements such as protein powder, just don't buy it, it's very simple ~ ~