I smoked for 20+ years, 20 a day, and found it made me very breathless. I tried quitting and nrt but was unsuccessful. As a result I was rarely able to exercise and gained lot’s of weight. I switched to vaping 7 months ago and the health benefits were amazing, within a month I could breathe properly again and have since been able to get lots of exercise. I have lost all the weight and can happily run around with my kids now. Without e-cigs that would not have happened.