Every year in winter, the clock hands in many countries are moved back one hour, which is called daylight saving time.
Although this change provides an opportunity for an extra hour of sleep, experts say it can affect our body’s biological rhythm, called circadian rhythm. According to heart surgeon Dr. Jeremy London, even this minor change can have a negative impact on our heart, brain and sleep.
Dr. London explains that turning the clock back one hour can cause disturbance in the biological balance. He says that ‘a change of just one hour can completely disrupt our circadian rhythm. “This may result in increased incidence of heart attacks, strokes, mood swings and road accidents.” According to experts, this change causes an immediate shock to the body, affecting sleep and concentration.
According to Dr. London, our body works according to natural light. Our biological clock is balanced by sunlight. When there is a sudden change in time, this balance gets disturbed. He says, ‘Research shows that as light exposure changes, sleep quality decreases, cortisol hormone increases and inflammation in the body increases.’ This effect is especially visible in spring.
The American Academy of Sleep Medicine recommends adopting a consistent standard time that aligns with our natural rhythms. According to Dr. London, until this happens, we should take some precautions. He says, ‘It is necessary to sleep and wake up at the same time every day. Spending some time in the morning sunlight and doing meditation or walking can be beneficial for mental peace.
Dr. London believes that sleep is the foundation of our health. He says, ‘If your sleep is affected, it affects every aspect of your life – mental, physical and emotional.’ They suggest that light exercise during the day, spending time in natural light, and reducing caffeine intake prepare the body for the change.
This article is for informational purposes only. Experts believe that even small habits like daylight saving time can deeply affect our body’s rhythm. Therefore, it is extremely important to maintain regular sleep, a balanced routine and exposure to natural light.
