I'm a 59 year old "newbie" to COPD. Morbidly obese and dreadful trouble with breathing as I'm a chronic asthmatic and nearly died from pneumonia eight years ago. Tested for COPD very recently and put on Spiriva. In past eight weeks I've lost 48lbs but can now walk for 24 minutes at 2.5 miles an hour and go to gym. Don't feel that out of breath. Do you think my COPD might be a misdiagnosis due to the fact that I am so overweight and, until recently, very unfit? Or would Spiriva make that big a difference. Peak flow has gone up from 240 to 360.