I can tell you this without one doubt;
Before that, I had stopped running regularly because I became discouraged by seeing the effects of 16 years of smoking a pack a day (past 3 years = 1.5+ packs a day) finally take their toll.
I had been smoking roughly two packs a day for the past 28.5 years, but had been working out and speed-walking before I switched to vaping and snus.
2 Miles in 23 minutes.
I was doing a two mile speed-walk in 25 minutes, again, before I switched to vaping. At one point in time, I was even carrying 25 lbs of dumbbells, on a regular basis, as I did this.
I honestly can't tell much difference since switching to vaping. I have since decided to stop speed-walking and start jogging instead, but that was only because the speed-walking wasn't doing anything for me anymore. I will turn 45 in a few more months.
On the other hand, I have a history of high levels of phsyical activity in my past, whether roller-blading 50 miles a week 15 years ago, when I was smoking 2.5 packs per day, or whether climbing a local mountain 3 times a week 3 years ago, while smoking 1.5 packs per day.