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if you measure lifespan based on number of heartbeats, all mammals basically converge on 1-2 billion heartbeats per lifetime.

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If you regularly do sports, your average heartbeat rate is lower. I wonder if that contributes to the lifespan?

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i think so

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Super interesting and makes perfect sense. A while ago I read that if you can lower your heart rate you can live longer. This confirms what I read.

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