Daily exercise concentrating on aerobic and strengthening/resistance training is the key to managing and controlling COPD. It helps the lung function we do have become more efficient. Strong muscles use less O2 to do a lot more than weak flabby muscles. Continuing to exercise and to push a little bit every three or four days can make a huge difference in what you're able to do and how comfortably you can do it. If you don't have an exercise program talk with your doc, get approval to start and get moving. It will make a huge difference.
My doctor tells me walking is the best exercise for COPD. I can no longer 6 to 8 miles, 5 or 6 days a week as I had been doing. I can only walk about 8 to 10 blocks but my doctor says it is because I'm in a bad flare up right now due to constant back and forth with our weather here in St. Louis and allergy season which apparently is rather bad right now. I was told to walk very early morning. Not a really good idea as I live in St. Louis City in a not very safe neighbourhood. I try to walk when I can tbough and find when I do I feel better. I just use my albuterol about 15-30 minutes before I walk. I will also rest for a bit at the first sign of shortness of breath.
Yes it does because the muscles we use to breathe become weak and it strengthens them. It also helps to keep us from having exerbations or flare-ups. When I exercise I feel better.