Elevated heart rate/blood pressure is often cited as a benefit of working out but a negative side effect of many vices such as nicotine. Why is it healthy in one scenario but not the other?
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When you exercise, you’re conditioning/strengthening your heart. You’re teaching it, by slowly increasing your reps/distance, to be a bit stronger. People who workout often tend to have a lower resting heart rate & lower blood pressure because they’ve strengthened their hearts. When working out, it also takes longer for those who regularly exercise to meet their maximum suggested heart rate than it would for those unused to the intensity. High blood pressure or an increased rate from outside sources can be detrimental on the heart because it hasn’t been conditioned/strengthened, so it can’t handle the increased workload/frequency.
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