After looking at 20 years of records, Swedish researchers found that the number of heart attacks decreased the Monday after daylight savings time ended, possibly due to the extra hour of sleep most people get. Typically, most heart attacks occur on Mondays due to the increased stress load and activity of the new week. The researchers also noted that the number of heart attacks increased throughout the week after “springing forward” an hour. This may be due to the persistence of sleep disturbance following the reduction of sleep time, which may add to the stress load of the work week.
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Dr. Steven Chang, the author of DailyDose, is a staff physician with Kosmix RightHealth. Dr. Chang practices Family Medicine at the University of California Davis Medical Center, where his medical interests include both pediatric and geriatric care, public health, gay and lesbian health, and sleep medicine. Dr. Chang trained at the Stanford University affiliated O'Connor Hospital, and was a research fellow at the National Institute of Health. He holds an M.D. from McGill University and a BA in Public Health from Johns Hopkins University.