This Sunday, March 29, clocks will be moved forward one hour, marking the start of summer time in many European countries. Although the change may seem small, experts warn that it can have a significant impact on our bodies, as it interferes with the circadian rhythm , the internal biological “clock” that regulates sleep, wakefulness, hormone production and mood.
Most people manage to adapt to this change within about a week. However, for some people, the adjustment can take longer, even several weeks or months, depending on their genetic predisposition. In the first period after the time change, studies have shown a temporary increase in road accidents, as well as a higher risk of depressive episodes and cardiovascular problems.
On the other hand, one of the most obvious benefits of switching to summer time is the longer hours of daylight during the afternoon, which gives people more opportunities for outdoor activities.
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However, experts point out that exposure to light late in the evening can make it harder for the body to understand that it is time to relax and sleep. Light inhibits the production of melatonin, the hormone that helps the body prepare for sleep. The more light there is in the evening, the more difficult it is to fall asleep.
According to circadian rhythm researcher Jeffrey Kelu at King's College London , most people adapt relatively quickly to the time change, but for some individuals the process can take longer. He explains that the body's internal clock is also influenced by genetics and that more research is needed to understand why some people have a harder time getting in sync.
The expert recommends that for better quality sleep, the bedroom be kept as dark as possible before and during sleep, so that the body receives the right signal that the day is over.
Circadian rhythm is essential for health, as it helps the body function in accordance with the 24-hour cycle of the day. When this rhythm is disrupted, the risk of problems such as obesity, heart disease, type 2 diabetes and high blood pressure increases. Recent studies have also found a link between a poor circadian rhythm and the risk of dementia.
Meanwhile, debates about abolishing seasonal clock changes have been ongoing in Europe for years. Many scientists recommend keeping winter time permanently, as it better aligns with the body's natural rhythm and provides more natural light in the morning, a very important element for regulating the biological clock, especially during the winter months.
