ELI5, Why does when the heart stops, the person immediately collapses? When in contrast we are able to do aerobics, hold our breath etc and nothing happens?
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We’re usually aware that a person’s heart has stopped *when* they collapse. That doesn’t mean it stopped right that second. Their body may have carried on as normal for a few seconds to a minute on the leftover energy after the blood stopped delivering new energy.
That makes it very similar to holding your breath. You can’t hold your breath for much longer than a minute. If someone went longer without oxygen, they too would collapse and die.
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