LUNG CAPACITY: I'm 79 years old and have been using the E-Cig for only 6 months. During my recent annual physical, the Spirometer test indicated that my lung capacity had almost doubled. Obviously, I'm quite pleased. For exercise, I bicycle every other day for about an hour, but last year's test showed no change so I must attribute my improvement to the E-Cig. HEART RATE: Vapping straight nicotine gives us that "hit" and I had concern about elevated levels when vapping. Using a digital heart monitor, I made numerous tests both before and during heavy hits, finding no significant difference, and on several occasions, a reduced heart rate which, I assume, was the calming effect of mild nicotine use. I use both 16mg and 18mg levels. For further improvement, the doctor recommended that I definitely continue biking inasmuch as the lung sacs that are now being purged require exercising to attain maximum capacity. For those of you who have experienced improved breathing using E-Cigs, I highly recommend regular exercise. I know, it's boring and hard to get into, but it's a lot like substituting E-Cigs for analogs -once into the benefits, you become a little obsessed with it. I'm older than most -if not all- of you and I do it. So can you.