"Changing clocks twice a year could be putting 300,000 Americans at risk of a potentially fatal stroke each year. A new study, conducted by Stanford Medicine researchers, found that switching between Daylight Saving Time (DST) and Standard Time (SDT) disrupted the body's internal clock by forcing it to adjust too often to changes in light and darkness. Daylight Saving Time"
"While simulating what would happen the US decided to make SDT permanent after 'falling back' in November, estimates showed the change could prevent about 300,000 stroke cases annually by reducing this circadian strain. Switching to permanent DST was less effective because it prioritized evening light over morning light, but it still prevented around 220,000 strokes compared to constantly resetting the clocks every few months."
"Dr Jamie Zeitzer, a professor of psychiatry and behavioral sciences, said: 'Staying in standard time or staying in daylight saving time is definitely better than switching twice a year.' A stroke occurs when blood flow to the brain is blocked or a blood vessel bursts, damaging brain cells and potentially causing death. According to the CDC, about 795,000 strokes occur annually in the US, with 185,000 being fatal."
Switching between Daylight Saving Time and Standard Time disrupts the body's internal circadian clock by forcing repeated adjustments to changes in light and darkness. This weakening of the circadian rhythm reduces morning light signaling that regulates bodily functions, increasing blood pressure and brain inflammation and raising stroke risk. Permanently adopting Standard Time after the November shift would prioritize morning light and is estimated to prevent about 300,000 stroke cases annually by reducing circadian strain. Permanently adopting Daylight Saving Time would prevent around 220,000 strokes but remains less effective because it prioritizes evening light. Twice-yearly clock changes pose greater health risks than a fixed time policy.
Read at Mail Online
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