[Ntrik]

Speaking for myself I had to quit smoking after years as soon as I saw it was affecting my bottom time, overall spearing duration, and minimum intervals between dives. I was useless for about a year or so (violent coughing fits after dives, strong acid reflux) but recovered completely since. On the other hand I have seen heavy smokers that are amazing freedivers and spearos that light up as soon as they get on the boat but usually these people are in the water 2 times a week minimum for years.