My husband went to the mines in montana a few years ago. It was during a very bad fire season in colorado. He went for his lungs. He said it didn't really help but it didn't hurt either. However, I remember his breathing was much better than everyone elses after all the fires. I asked about it again after reading your post. He says he remembers sitting with arthritics who went their every year. He also said bring your own entertainment. The mine is in a small town and there wasn't much to do. If you do it good luck and let me know how it goes. Maybe I'll try it.
