Just for fun - on my next Doc visit when asked to take a deep breath I am going to ask stomach or chest? I got tired of explaining low vitals when giving blood and sometimes being turned down so now I drink a couple cups of good coffee before apt's. Biking is way better than "an apple a day" to keep the doctor away. At 77 I can't run, swim or hike much any more - but I can do a forty mile ride today with no strain or pain.