But it then over time it lowers your resting blood pressure. Not sure nicotine would since most users constantly use it (and it may not with occasional use either, I'm not sure).

Yeah, but it's supposed to. Inhaling something and then your BP goes up means you should not inhale that thing, eh?

Indeed, too much training can be counter productive. Vice versa, runners can't just stop and settle down, neither after a race nor after a carreer, or they'd risk heart failure. I cannot explain it but I think it's common knowledge.

Source?