“Summer time is the enemy of health that disturbs the body clock”

In North America, daylight saving time, which is advanced by one hour, ended at 2 am on the 7th (local time), the first Sunday in November in North America. From this point on, it returns to normal time, but daylight saving time begins at 2 a.m. on the second Sunday (13th) of March next year. Despite the advantages of saving energy and increasing productivity by extending daylight hours, daylight saving time causes various health problems, the US health and medicine portal WebMD reported on the 5th.

“It’s very important to synchronize your sleeping and waking times,” said Professor Charles Tsyler, director of sleep and diurnal disorders at Brigham and Women’s Hospital in Boston, USA. said Studies have shown that waking up an hour earlier than usual leads to an increase in traffic accidents, an increase in the incidence of stroke, and an increase in the incidence of heart attacks.

An organ called the suprachiasmatic nucleus (SCN) located inside the hypothalamus of our brain plays a role in synchronizing our body time using hormones and chemical signals. This body clock is linked to the regulation of liver function, immune system, and physiology. However, when daylight saving time is implemented, the time difference between this body clock and the clock of daily life may cause abnormalities in the body.

A study published in the journal «Sleep Medicine» in 2015 compared the incidence of stroke on weekdays immediately after daylight saving time, two weeks before and two weeks after that. The results showed an 8% higher risk of stroke during the first two days of daylight saving time. Cancer patients were 25% more likely to have a stroke than at any other time of the year. The risk of stroke was also 20% higher in those over 65 years of age.

Also, according to a study published in the «Journal of Clinical Medicine» in 2019, when daylight saving time was applied, the risk of heart failure was higher than when daylight saving time was not applied. This applies to both the daylight saving time period and the non-daylight saving time period, and it was found that the risk was higher during the daylight saving time period in particular.

Disruption of the circadian rhythm can also impair concentration and judgment. According to a paper published in the international journal “Current Biology” in 2020, the rate of fatal road accidents in the United States during daylight saving time increases by 6%.

“The majority of people consider an hour difference to be insignificant,” said Professor Zyler. Professor Ramiz Fargo, medical director at the Center for Sleep Disorders at Roma-Linda University in California, USA, said, “After daylight saving time, delaying sleep by one hour makes up for lost sleep, but it is not easy to adapt.” said

The end of daylight saving time is not easy for people with mood disorders to adjust to, Professor Fargo explained. A study published in the international journal Epidemiology in 2017 showed that hospitals reported an 11% increase in depression symptoms immediately after daylight saving time. It could be the result of a sudden one hour reduction in sunlight, he explains.

But there are tips to make the most of the extra time while making this body time transition easier, says Fargo. Going to bed 15 to 20 minutes earlier, before the clock is delayed by an hour, helps the body clock adapt.

The following advice is also helpful.

-Avoid alcohol and caffeine. Both are common causes of sleep deprivation.

– Reduce the amount of time you watch videos or mobile phones before bedtime.

-Limit nap times to adjust your sleep schedule.

– Avoid binge eating within two hours before bedtime.

By Han Gun-pil, reporter [email protected]

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