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I did an experiment and it came out younger people have faster heart rates then older people. This may be because the younger peoples hearts are not fully developed and are more expandable which makes the heart pump faster. Or, it may be because younger people have a faster metabolism.

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13y ago
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11y ago

Some peoples hearts beat faster than others because they may have had a very traumatic event that happened when they were small. Like, for example, your airplane was struck by lightning when you were 1 year old and now your heart beats faster than everyone else. And it also make you have a lot more energy.

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11y ago

Variables that could change the pulse rate are:

* Age of person

* Temperature

* Smoking

* Weight of person

* How often the person exercises.

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11y ago

People's muscles start requiring more oxygen so the heart has to work harder to pump it around the body

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Q: What causes people's heart rate to speed up?
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