by Many of the United States “jump forward” on Sunday 9 March for daylight savings. Many other countries also take time to save daylight, starting and ending on different dates worldwide.
The time change can make people tired and perhaps unhappy the next day. But it can also even harm health. Some studies found an increase in heart attacks and strokes immediately after the time change of March.
However, there are ways to facilitate the effects of time change, including getting more sunshine. The light helps your Circadian Rhythm For a healthy sleep.
When does the day -time time start?
In the US the daylight -saving time starts on Sunday at 2:00 in the morning. The time change will reverse On November 2 when clocks “fall back” ends as a daylight -saving time.
The state of Hawaii and most of the state of Arizona do not change spring. These areas remain on standard time with Puerto Rico, the American Samoa, Guam and the American Virgin Islands.
Some people try to prepare for the change in daylight that saves time to bed by going to bed a little earlier. But with a third of American adults who do not get the proposed seven hours of night sleep, catching up can be difficult.
Brain
The brain has a kind of clock that is set by exposure To sunlight and darkness. This clock, known as the circadian rhythm, is approximately 24 hours cycle. It rules when we become sleepy and when we are more watchful. The rhythms change with age. This is a reason that early young children become of difficult teenagers.
Morning Light reset the rhythm. In the evening, levels of one hormone Called melatonin, starts to rise, which leads to fatigue. Too much light in the evening – that extra hour of daylight -saving time – slows the increase in melatonin. As a result, the cycle is delayed.
The circadian rhythm affects more than sleep. It also influences heart rate, blood pressure, hormone releases and other systems.
Health effects
There is a lack of sleep, or lack of sleep, is linked to heart conditions, weight disorders, problems with thinking and remembering, and more.
Deadly car -crash numbers increase the first few days after the change of spring, says an investigation into American road deaths. The risk of crashes is highest in the morning, it turned out. Researchers suggested that there could be a lack of sleep.
The time change also has a link to the heart. The American Heart Association points to studies that suggest that an increase in heart attacks on the Monday after the daylight will start saving time, and two days later in strokes.
Doctors already know that heart attacks, especially serious, generally occur a little more often – and in the morning, when blood is more likely solidify.
Researchers do not know why the time change would contribute to that Monday connection. But it is possible that the sudden circadian change influences other issues, such as high blood pressure in people who are already in danger.
Prepare for the time of the daylight
To prepare for the time of daylight, experts offer some advice. Slowly move beds that changes a few nights before the time about 15 or 20 minutes earlier. Try to get up earlier the next morning. Go outside for the early morning sun in the first week of the daylight saving. This is another way to reset the clock of your body. Start daily activities, such as dinner or exercise, a little earlier. This can help to tell your body to get used to the new circumstances, suggesting sleep experts.
Sleeping during the day, drug cafeine and light from telephones and other electronic devices can make a previous bedtime even more difficult.
Turn off daylight saving time?
Americans have discussed the ending daylight -saving time. But so far no official changes have been made.
Health groups such as the American Medical Association and American Academy or Sleep Medicine believe that it is time to end time changes. The groups suggest that it works for human biology and sleeping needs all year round.
I am Caty Weaver.
Lauran Negaard reported on this story for The Associated Press. John Russell adapted it for VOA who learned English.
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Words in this story
Circadian Rhythm – N. The mental, behavioral and physical changes that a person experiences for a period of 24 hours
exposure – N. The state of subject is to any effect or influence
reverse – v. To undo, turn into a position or direction
cycle – N. A series of events that take place regularly and return to the same starting point
hormone – N. A product of living cells circulating in the body and has an effect on the activity of cells
solidify – v. To undergo chemical reactions that lead to blood becoming a lump or mass (a clot)
