เป็นการศึกษาในผู้ที่นอนเท่ากับหรือน้อยกว่า 7 ชั่วโมงต่อคืน
Going to bed an hour earlier each night ‘lowers blood pressure in just six weeks’
- Researchers found people showing early signs of high blood pressure could restore readings to healthy levels by sleeping an extra hour every night
- The study looked at people who slept only seven hours or less who were beginning to have borderline high blood pressure readings
By PAT HAGAN
PUBLISHED: 00:57 GMT, 4 December 2012
Going to bed an hour earlier than usual could help to ward off high blood pressure, according to a new study.
Researchers found people who were showing the early signs of high blood pressure were able to restore readings to healthy levels in just six weeks if they had an extra hour in bed every night.
The study, carried out at Harvard Medical School in Boston, USA, looked at men and women who regularly slept for only seven hours or less a night and were beginning to have borderline high blood pressure readings.
High blood pressure, or hypertension, affects one in five adults in the UK and is thought to be responsible for half of all heart attacks and strokes.
But despite an array of different drugs available on the NHS, it’s estimated more than half of all patients have ‘poorly controlled’ blood pressure, which means they still have readings in the danger zone above 140mmHg/90mmHg, a measure of the amount of force inside arteries when the heart is forcing blood through them and the force when it relaxes.
Lack of sleep and a stressful lifestyle have long been associated with an increased risk of the condition.
But the latest study is one of the first to prove that blood pressure can be brought under control by simply increasing sleep duration.
Researchers recruited 22 middle aged men and women who either had prehypertension, where their readings were not excessively high but had been increasing and were on target to reach dangerous levels.
The volunteers all claimed to sleep seven hours or less a night.
Over a six week period, 13 of the group were told to extend their sleeping patterns by getting to bed an hour earlier than they normally would.
The rest were told to stick to their normal sleeping routines.
They all wore monitors to check their blood pressure round-the-clock and underwent blood and urine checks too.
The results, published in the Journal of Sleep Research, showed the extended sleep group managed to get at least 35 minutes extra in bed.
As a result, their average blood pressure readings dropped sharply by between eight and 14mmHg.
It’s thought too little sleep affects the body’s ability to deal with stress hormones that can drive up blood pressure.
In a report on their findings the researchers said extra sleep could soon be prescribed as a remedy for high blood pressure.
‘These preliminary findings have to be interpreted with caution. But future investigations should look at whether increasing sleep duration serves as an effective strategy in the treatment of hypertension.’