If you find yourself dreading the clock changes, you’re not alone. A recent study from Stanford Medicine’s sleep researchers highlights some interesting considerations about time shifts, particularly for places like Hawaii or Arizona.
While we’ve been adjusting to daylight saving time for years, the study brings to light some potential negative health impacts linked to these changes. For example, it suggests that the end of the daylight saving period can correlate with a rise in heart attacks and car accidents. Researchers noted significant benefits of adopting permanent standard time, which could lead to about 2.6 million fewer obesity diagnoses and approximately 300,000 fewer strokes annually. It seems that if we stopped flipping the clocks back each year, our health could improve in various ways.
Lara Weed, a graduate student involved in the research, mentioned that they used an advanced circadian model intertwined with data from the Centers for Disease Control and Prevention. The findings were published in the *Proceedings of the National Academy of Sciences,* revealing that most U.S. states might be choosing the least beneficial of three time policies for overall health.
Dr. Jamie Zitzer, a senior author and professor, remarked that sticking to either standard time or daylight saving time is preferable to the biannual switch. “I think,” he said, “people’s schedules would benefit from avoiding that disruption.”
There’s ongoing debate about time changes, especially when daylight saving approaches. A new bill proposed by Senator Rick Scott aims to make daylight saving time permanent. He commented on how Americans are weary of the twice-a-year clock adjustments, which seem more annoying than beneficial.
The National Sleep Foundation supports making standard time permanent, arguing that daylight saving actually disrupts our natural circadian rhythms. They emphasize the importance of morning light to help regulate our sleep-wake cycles and overall health.
However, both Weed and Zitzer noted that their study might not account for other factors—like economic or security concerns. Plus, the model assumed consistent outdoor activities and sleep patterns, which many people likely don’t follow. Zitzer pointed out, “People’s actual light habits may be far less ideal than what we modeled.”
Understanding Circadian Rhythm
The brain operates on a master clock governed by light exposure, creating a roughly 24-hour rhythm that influences our sleepiness and alertness. This cycle can shift as we age, explaining why younger individuals sometimes have difficulty waking early, especially as teenagers. Morning light acts to reset this rhythm, while evening light can hinder the natural surge of melatonin, leading to disrupted sleep cycles.
Sleep deprivation is linked to numerous health problems such as heart disease and obesity, and our circadian clock affects more than just sleep; it also plays a role in heart rate and metabolism.
The next time change is scheduled for November 2, 2025, when clocks will roll back at 2 a.m.
