Three or more naps a week had no health benefits.
Häusler and her colleagues tracked the participants for five years. All were between 35 and 75, basically healthy without any evidence of heart disease, and none were overly sleep-deprived.
About one in five participants hit what the researchers found to be the napping sweet spot: one to two times per week. Nap length did not appear to influence the findings, and included anything from a quick, five-minute catnap to an hour-plus snooze. Because the study was observational, it cannot prove cause and effect.
This does not mean physicians should start writing prescriptions to nap for optimal heart health, mainly because there's no way to know what"dosage" is best.
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