Congress is nearing a decision to make daylight saving time a permanent fixture in the United States. However, health experts caution that this shift might have negative health repercussions. Dr. Karin Johnson from the American Academy of Sleep Medicine suggests Americans may never fully adjust to this change.
Legislative Progress
Legislators have long advocated for making daylight saving time permanent. They argue that the current system of changing clocks is outdated. They believe that a permanent daylight saving time would boost the economy and improve health. The House recently passed the Sunshine Protection Act, with 308 votes in favor and 117 opposed. It now moves to the Senate. President Donald Trump indicated his willingness to sign the bill into law if it passes.
Potential Health Impacts
If ratified, the measure would mean permanent daylight saving time across almost all states, excluding only two. This change would result in more evening sunlight and less in the morning. Health experts like Dr. Johnson highlight potential downsides. Despite more evening daylight, studies show no significant increase in exercise among those who did not already engage in regular physical activity.
Dr. Johnson points to data indicating a 10% rise in obesity rates and higher rates of heart disease associated with daylight saving time. She emphasizes that the anticipated health benefits of increased fitness are not evident; instead, the opposite has been found.
Adjustment Challenges and Circadian Rhythm
Many people struggle with clock adjustments twice a year. Experts argue that even if daylight saving time becomes permanent, individuals will not fully adapt. Dr. Johnson mentions chronic effects experienced by some due to misalignment with the circadian rhythm. Michael Grandner of the University of Arizona adds that living indefinitely on a shift that is biologically later than the sun could have public health effects.
Dr. James Rowley from Rush University highlights the importance of bright mornings and dark evenings for proper sleep. Insufficient sleep raises risks for cardio-metabolic problems like heart disease and high blood pressure. Poor sleep also affects vaccine response and may contribute to higher cancer risks.
Particular Vulnerability of Teenagers
Teenagers might be particularly impacted by the shift due to their existing struggles with early mornings. Poor sleep can lead to lower academic performance and increased risks of substance abuse and depression.
Regional Variations in Impact
Grandner notes that effects could differ regionally. People living at the western edge of time zones may face a larger biological adjustment than those closer to the equator or eastern areas.
Understanding Daylight Saving Time
The proposed change would eliminate the need to adjust clocks biannually. Currently, daylight saving time occurs from mid-March to early November. Standard time offers more morning light but less in the evening.
Considerations for Permanent Change
The Senate has not yet scheduled a vote on the Sunshine Protection Act. Proponents are urging prompt action. Health experts, however, suggest that permanent standard time may better align with human biological rhythms. One bill proposes standard time as the permanent option, but its future is uncertain.
Dr. Rowley criticizes the current practice of biannual time changes as unnecessary, creating potential health ripples. He argues for standard time as more aligned with human biology.
Leave a Reply