PhD researcher Kim Yongsoo from the University of Virginia (USA) School of Nursing found that waking up with an alarm can lead to hypertension and increase the risk of stroke and myocardial infarction. results published on the university’s website – University of Virginia.
32 people participated in the research. For two days, volunteers were required to wear a smartwatch that recorded blood pressure readings. On the first day of the experiment, the subjects had to wake up naturally the next morning, without an alarm. In the second stage, volunteers were told to set an alarm clock that would go off 5 hours after falling asleep.
As a result of comparing blood pressure indicators, it turned out that waking up with an alarm clock contributes to its sudden increase. It is stated that this can trigger dangerous situations such as heart attack and stroke. The increase in blood pressure was 74% less severe in people who woke up naturally.
The fact is that fluctuations in blood pressure stimulate the activity of the sympathetic nervous system, which increases blood flow to vital organs, which is necessary during stress. This is accompanied by narrowing of blood vessels and increased stress on the heart. In addition, lack of sleep (less than seven hours a day) aggravates the negative consequences on the cardiovascular system, causing an even sharper increase in blood pressure.
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