So I quit smoking three weeks ago and started vaping. I also missed my running training during this period for other reasons. And yesterday I had a first run after switching from analogues to digital. My first observation was that even though I missed a lot of training time my pulse went down about 5 points lower while jogging since last run. This is good! But now my lungs are burning while running. The burning is not critical, so I did not go to a doctor yet, but I have a question - did anyone experience something like that after quitting the cigs?