Spanish-style siesta could reduce blood pressure, medications


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Taking midday naps as they do in Spain was associated with lower blood pressure and the need for fewer antihypertensive medications in a new study.

Spanish-style siesta could reduce blood pressure, medications

"Although William Blake affirms that it is better to think in the morning, act at noon, eat in the evening and sleep at night, noon sleep seems to have beneficial effects," says Dr. Manolis Kallistratos of the Asklepieion Voula General Hospital in Athens, Greece, referring to the renowned British poet.

Working with 386 middle-aged patients, 200 of whom were men and 186 were women, Dr. Kallistratos and his team set out to tackle the question of whether a midday siesta - which has all but disappeared in many Western cultures - could be beneficial.

Participants averaged 61.4 years old and all of them had arterial hypertension.

The team took note of how much they slept midday and measured their diastolic and systolic blood pressure while they were at their offices and additionally they assessed their 24-hour ambulatory blood pressure.

Body mass index (BMI), age, gender, smoking habits, diet, exercise and caffeine intake were taken into account.

The research team also performed a complete echocardiographic evaluation that included measuring the heart's left atrial appendage and they recorded participants' pulse wave velocity -- a measurement of arterial stiffness.

This measurement demonstrated the most dramatic difference between siesta-takers and those who do not nap midday -- siesta-takers' average pulse wave velocity was 11 percent lower than others and the siesta-takers' left atrium diameter was 5 percent smaller, on average.

"These findings suggest that midday sleepers have less damage from high blood pressure in their arteries and heart," says Dr. Kallistratos.

Those who took regular siestas had a five percent lower average 24-hour ambulatory systolic blood pressure, which measured 6mmHg, when compared to their non-napping counterparts.

For the siesta-takers, the average systolic blood pressure reading was four percent lower when measured while they were awake, at 5mmHg and six percent lower when they slept during the night, averaging 7mmHg.

"Although the mean BP decrease seems low, it has to be mentioned that reductions as small as 2 mmHg in systolic blood pressure can reduce the risk of cardiovascular events by up to 10 percent," says Dr. Kallistratos.

What's more, the longer the siesta, the more beneficial it appears to be, says Dr. Kallistratos, for the longer participants slept in the afternoon, the fewer drugs they needed to bring down their blood pressure.

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