why is increased heart rate considered dangerous when it comes as a side effect of drugs (ie cocaine, marijuana) but considered beneficial and necessary when caused by aerobic exercise?

Question

I’ve even seen “increased risk of stroke” caused by this increase in heart rate. Something is not adding up here, why such a big difference?

In: 20

Answer 1

Your body is a car, your heart is the engine. Revving the engine as much as you can while holding the breaks will put wear on the car more than if you were revving it but moving because the car is using the energy to move instead of just sitting on it.