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

If you do sport the heart work in his normal condition and need to pump more blood in order to supply your body with the needed oxygen. If you do drugs the heart will expand and the ability to pump enough blood to supply your body with oxygen will decrease, therefore it will increase the heart rate in order to pump enough blood. A not *expanded* heart can pump blood way better than a expanded one, thats why you train your heart in a healthy way with cardio and stress it for no benefits with drugs.