If exercising makes your heart stronger why are amphetamines and anxiety bad for your hear?

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Increasing your heart rate makes it stronger. But drugs like cociane, meth and disorders like anxiety that increase your heart rate are bad for your hearts health. Shouldnt it make the heart stronger?

In: Biology

Increasing you heart rate is like a car going faster: through exercise is like using the gas pedal normally to control the acceleration of the car; amphetamines, anxiety, drugs like cocaine is like your car going off a cliff to go faster. You’re going faster, but you’re probably going to die in the end.

Cheers.

Uneducated theory here. When you exercise, you’re not only strengthening your heart, but your entire cardiovascular system.

When you rack up you’re just telling the heart to beat faster which the heart, or the rest of the cardiovascular system, is not necessarily well prepared for.

When exercising, you’re not just increasing your heart rate. The blood vessels throughout your body also dilate to allow better blood flow to your heart muscles and other organs

Using cocaine and amphetamines, even though your heart is beating fast, the drugs causes arteries to constrict, restricting blood flows. So your heart is made to work harder without good blood flow. On top of that, the blood pressure exerted in your brain is vastly increased which can lead to a stroke.