Results: Previous smokers [odds ratio (OR) = 1.25, 95% confidence interval (CI): 1.051.48] and occasional smokers (OR = 1.84, 95% CI: 1.392.45) were associated with a higher risk of depression compared with never smokers
"Since symptoms associated with nicotine withdrawal, such as irritability, can have other causes these symptoms were counted only if subjects attributed them to nicotine withdrawal" [20], p
This isnt just about trapping smokeit actively breaks down harmful gases and pollutants at a molecular level
I was running for a boston qualifying time so I was not in a group/pack during the race so can't comment about how that would be (it could be an issue as there are water runoff ruts all along the course that you might have to run in if you don't have the lateral mobility and forward visibility to stay out of them as you go) I ran with a fuel belt so was not as reliant on the aid stations prior to mile 12, so can't say much about those other than to say there were a lot of people to help pass out fluids and gels
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One thing to note while NiChrome can technically be used in TC mode (and some mods boast that ability), its TCR is so low that even the most advanced chips struggle with it