WASHINGTON (AP) \u2014 Most of America \u201csprings forward\u201d Sunday for daylight saving time. Losing that hour of sleep can do more than leave you tired and cranky the next day; it also could harm your health.<\/p>\n
Darker mornings and more evening light knock your body clock out of whack \u2014 which means daylight saving time can usher in sleep trouble for weeks or longer. Studies have even found an uptick in heart attacks and strokes right after the March time change.<\/p>\n
There are ways to ease the adjustment, including getting more sunshine to help reset your circadian rhythm for healthful sleep.<\/p>\n
Daylight saving time begins Sunday at 2 a.m., an hour of sleep vanishing in most of the U.S. The ritual will reverse on Nov. 1 when clocks \u201cfall back\u201d as daylight saving time ends.<\/p>\n
Hawaii and most of Arizona don\u2019t make the spring switch, sticking to standard time year-round \u2014 along with Puerto Rico, American Samoa, Guam and the U.S. Virgin Islands. Worldwide, dozens of countries also observe daylight saving time, starting and ending at different dates.<\/p>\n
Some people try to prepare for daylight saving time by going to bed a little earlier two or three nights ahead.<\/p>\n
While getting back on schedule after an hour\u2019s change may not be that difficult for some people, it\u2019s an added challenge for the third of U.S. adults who already don\u2019t get the recommended seven hours of nightly shuteye.<\/p>\n
The brain has a master clock that is set by exposure to sunlight and darkness. This circadian rhythm is a roughly 24-hour cycle that determines when we become sleepy and when we\u2019re more alert. The patterns change with age, one reason that early-to-rise youngsters evolve into hard-to-wake teens.<\/p>\n
Morning light resets the rhythm. By evening, levels of a hormone called melatonin begin to surge, triggering drowsiness. Too much light in the evening \u2014 that extra hour from daylight saving time \u2014 delays that surge and the cycle gets out of sync.<\/p>\n
Sleep deprivation is linked to heart disease, cognitive decline, obesity and numerous other problems. And that circadian clock affects more than sleep, also influencing things like heart rate, blood pressure, stress hormones and metabolism.<\/p>\n
Fatal car crashes temporarily jump the first few days after the spring time change, according to a study of U.S. traffic fatalities. The risk was highest in the morning, and researchers attributed it to sleep deprivation.<\/p>\n
Then there\u2019s the cardiac connection. The American Heart Association points to studies that suggest an uptick in heart attacks on the Monday after daylight saving time begins, and in strokes for two days afterward.<\/p>\n
Doctors already know that heart attacks, especially severe ones, are a bit more common on Mondays generally \u2014 and in the morning, when blood is more clot-prone.<\/p>\n
Researchers don\u2019t know why the time change would add to that Monday connection but it\u2019s possible the abrupt circadian disruption exacerbates factors such as high blood pressure in people already at risk.<\/p>\n
Go outside for early morning sunshine that first week of daylight saving time, which can help reset your body\u2019s internal clock. Moving up daily routines, like dinner time or when you exercise, also may help cue your body to start adapting, sleep experts advise.<\/p>\n
Afternoon naps and caffeine as well as evening light from phones and other electronic devices can make adjusting to an earlier bedtime even harder.<\/p>\n
Every year there\u2019s talk about ending the time change. Before starting his second term, President Donald Trump promised to eliminate daylight saving time. A bipartisan bill named the Sunshine Protection Act to make daylight saving time permanent has repeatedly stalled in Congress.<\/p>\n
But that\u2019s the opposite of what some health groups recommend. The American Medical Association and American Academy of Sleep Medicine agree it\u2019s time to do away with time switches but say sticking with standard time year-round aligns better with the sun \u2014 and human biology \u2014 for more consistent sleep.<\/p>\n","protected":false},"excerpt":{"rendered":"
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