Physical & spiritual; they are intertwined. what’s harmful for one will ultimately harm the other. You see it pretty clearly with unhealthy people. They unfortunately become compromised in their middos due to the physical suffering. The Rambam points this out that one can not be spiritually successful when his health is an issue. I think that long term consequences of spiritual sickness invades a persons physical health as well.
That said, I get so tired of hearing how smoking is the quintessential definition of unhealthy living. government sponsored anti smoking campaigns have been a part of everyone’s life for so long that we are in a state of mass hypnosis on the subject. Sure there’s truth to the fact that smoking is detrimental to a persons health but it’s not the only thing bad for you and it’s not the worse thing either I suspect. We get bombarded with advertisements that smoking is so evil and bad that most people fail to think for themselves objectively. I believe that being 25 pounds overweight is a much bigger health issue than smoking and yet even with the fact that extra weight is an issue, most people have a much kinder outlook at overeating than they do to smoking.
I don’t smoke and never have and I’m not overweight either. If I had to suffer the ill effects of one of those 2, I would take my chances with smoking and a lean body over being a non smoker but living with a load of extra weight ruining my cholesterol, blood pressure, joints and hormones any day.