During sleep, how low can the pulse drop?

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Multiple Choice

During sleep, how low can the pulse drop?

Explanation:
During sleep, the body shifts toward parasympathetic (vagal) dominance, which slows the heart rate. In healthy adults, nocturnal bradycardia is common, with the pulse dropping to about 40 beats per minute as metabolic demand decreases. Values around 40–50 bpm are typical for many people in deep sleep, especially those who are physically fit. Rates like 60–70 bpm are less reduced for sleep, so the lowest commonly observed nocturnal rate is around 40 bpm.

During sleep, the body shifts toward parasympathetic (vagal) dominance, which slows the heart rate. In healthy adults, nocturnal bradycardia is common, with the pulse dropping to about 40 beats per minute as metabolic demand decreases. Values around 40–50 bpm are typical for many people in deep sleep, especially those who are physically fit. Rates like 60–70 bpm are less reduced for sleep, so the lowest commonly observed nocturnal rate is around 40 bpm.

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