The reason I quit smoking and went to vaping was my shortness of breath. I have always been one to wheeze but after 35+ years of smoking my Doctor told me I was showing the beginning signs of Emphysema. I wanted to know if any of the long time smokers have experienced any level of restored lung function and how long did it take for them to notice it if so? I know my lungs will never be what they were 25 years ago. But I just haven't had the increased energy I feel I should have had.