I like my treadmill. I think both would do a good job.

I would walk but I can't for too long. My left legs goes completely numb then very painful. Worse then my head does. my head is now numb because I thought about what I was saying. LOLOLOL J/K

Do what you feel like you can do without over doing it .and be careful on these machines don't push yourself .remember do a little and rest then do a little always take those breaks it's so easy to over do it when you have copd

Most people with COPD would find it hard to manage an elliptical; the treadmill is usually preferred. If you can use the elliptical, go for it; just be sure you can use it!

I use a stationary bicycle, but not as often as I should. I do watch the Tour de France, however, and try to keep up with them. LOL!!!!