Cigarette smoking: an underused tool in high-performance endurance training(ncbi.nlm.nih.gov)
ncbi.nlm.nih.gov
Cigarette smoking: an underused tool in high-performance endurance training
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3001541/
1 comments
Shame you didn't actually read it.
Secondly, the benefits of cigarette smoking, as outlined here, explains why there's a lot of smokers in high-stress jobs.