What did the new study by Dr. Jennifer Rymer of Duke University Hospital find?

The study found no significant association between daylight saving time (DST) and the outcomes of patients presenting with myocardial infarction.

How does the Stanford University study suggest permanent standard time could benefit health?

The study indicates that permanent standard time could lead to a reduction in obesity and stroke incidents by better aligning with the body's natural circadian rhythms.

What advice do experts like Dr. Emerson Wickwire of the University of Maryland give to doctors regarding their patients around time changes?

Doctors are advised to monitor high-risk patients, such as those with sleep disorders or safety-critical jobs, and educate all their patients on the importance of good sleep habits.

Home / Health / Time Change Debate Rages On: New Study Debunks Heart Attack Myth

Time Change Debate Rages On: New Study Debunks Heart Attack Myth

24 Oct, 2025

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Summary

New study finds no link between daylight saving time and heart attacks
Researchers say improvements in medicine have reduced heart attack risks
Calls for ending biannual time changes to improve health and sleep

Time Change Debate Rages On: New Study Debunks Heart Attack Myth

In October 2025, a new study has challenged the long-standing notion that daylight saving time (DST) and the biannual time changes lead to an increase in heart attacks. The research, led by Dr. Jennifer Rymer of Duke University Hospital, analyzed data from nearly 170,000 patients in the Chest Pain MI Registry from 2013 to 2022.

The study found no significant association between DST and the outcomes of patients presenting with myocardial infarction. Rymer explains that the size and diversity of the dataset, as well as the exclusion of states that don't change their clocks, set this study apart from previous research that had suggested a link.