Why is it that when people become nervous their heart seems to thump louder?

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Why is it that when people become nervous their heart seems to thump louder?

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Because your body reacts to stress by releasing the hormone adrenaline, which not only stimulates you but can cause an increased heartbeat as well as heart palpitations.

When you become nervous, you just released hormones. One of those hormones is adrenaline. One of the “side effects” of adrenaline is an increase in your heart rate, hence the loud heart thumping

When you get nervous, you’re perceiving a potential threat. The body is adapted to react to threats by increasing the releasing of adrenaline. The adrenaline is responsible of undressing the heart rate. Increased heart rate means more circulation of oxygen, when the muscles receives more oxygen they can respond more quickly and strongly, and the brain receiving more often means that the reaction time is reduced. This ensures a better situation if, in case that the threat turned out to be real, you can react the best way, quickly and bill-fittingly, whether it is fighting back or running away.