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?


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

From my understanding, a sustained high heart rate is worrisome, but a brief burst of activity is not. Think of how doing push-ups can be easy but holding a plank position isn’t.

You can slow down or take a break if your heart is going too fast from exercise, but chemicals are going to keep going until they’re out of your system.

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.

Increases heart rate always increases the chance of stroke or heart attacks. When out of shape people join aerobic classes and push themselves too hard they often have medical issues. It’s a very common thing in cycling classes because the out of shape people are too embarrassed to stop or slow down. Increased heart rate from panic/stress are a similar issue to doing drugs. You aren’t physically exerting yourself so it’s not like you can just stop running to lower your heart rate. Someone panicking and having a heart rate spiking can suffer from a heart attack due to the increase in heart rate.

The better shape you are in aerobically, the more efficient your heart is. Your resting heart rate my be 70-80bpm while mine is 60bpm. If we both ran on a treadmill for 30 minutes at the same speed, my heart rate could be 100bpm and yours is 180bpm. Even after stopping, a more conditioned person’s heart rate will lower back down to their resting heart rate quicker.

In terms of doing drugs, your heart rate isn’t increasing due to your physical exertion but due to chemicals in your body. If my heart rate gets too high from exercise, I can slow down or stop to get it back to a healthy range. If you’re sitting on your ass not moving at all and your heart rate is spiking to over 200bpm, you’re pretty fucked because there isn’t anything you can do to slow it down except maybe meditating/calming yourself if it’s due to panic.

Another thing to keep in mind is increasing your heart rate regularly through exercise is strengthening your heart so it’s more acclimated to the stress of high heart rates. Some out of shape person who doesn’t doing any sort of exercise especially aerobic exercise is going to have a weaker heart that isn’t strong enough to sustain a high heart rate for an extended period of time.

Here’s an article that kind of goes into target heart rate ranges for running. Doesn’t really give much of a scientific explanation to your question but it might give a better idea of good and bad heart rate ranges: https://www.healthline.com/health/running-heart-rate#ideal-rate

The problem is quantity of exercise.

Aerobic exercise like running is beneficial *in an appropriate amount.* Cocaine forcing your heart to beat as fast as if you were running isn’t good when you’re only healthy enough to run for a few minutes **but the cocaine forces it to keep going that fast for 5 hours nonstop.**

Aerobic exercise is good because you can stop once you’re reaching the end of your stamina and there’s potential for damage. A chemically-elevated heart rate doesn’t care about that. Once you do a given amount of drugs, you can’t turn off the effect. And the effect probably lasts WAY longer than you’d exercise with zero breaks. When’s the last time you exercised with zero rest for as long as a high lasts? Unless you’re in insanely good shape you probably can’t if you tried.