Thanks for putting things in perspective on the smoking. I am not alone, and of course, all activity improves things. I probably wasn't clear in my initial post, but I was curious as to whether there were specific ways to improve lung function- do sprints help things more than steady riding at set pace for longer periods of time? Specific exercises or Physical Therapies to improve lung function? The electronic tracking makes it easier to see where things are working or not. Analyzing distance, elevation,speed, heart rate,cadence, etc make it apparent hills are my particular bugaboo, and the heart rate suggests I am not getting sufficient air. Just praying for a majick bullet!