I have severe COPD with other health problems. I see a lot of articles that tell us to exercise. I know walking is a good form of exercise. I walk, and I do breathing exercise, but I just don't feel like this is enough. I got some two pound weights to lift while I'm doing my breathing exercise. I'm 66 years old and not very strong.I hope to work up to 5 pound weights. Can anyone suggest a way to exercise?