The Tribune

By DR ARLINGTON LIGHTBOURNE

This past Sunday, we moved the clock forward by one hour. Many people shrug and say, “It’s just an hour.” But science tells a very different story. That single hour is not harmless. In fact, the shift associated with Daylight Saving Time disrupts one of the most important pillars of human health: sleep.

Sleep is not a luxury. It sits at the very top of the wellness hierarchy alongside nutrition, physical activity, and stress control. When sleep is disrupted, every system in the body, including the brain, the heart, metabolism, mood, and immune function, feels the impact.

Research from cardiology and sleep medicine consistently shows measurable health consequences immediately after the springtime change. Studies published in the American Journal of Cardiology and other peer-reviewed journals have demonstrated a noticeable increase in heart attacks during the week following the transition to Daylight Saving Time. Stroke risk also rises. Emergency departments in several countries report increases in motor vehicle accidents, workplace injuries, and fatigue-related errors.

Why does this happen?

Our bodies run on an internal clock known as the circadian rhythm. This rhythm is tightly synchronised with natural daylight patterns. When the clock suddenly shifts forward, our biological clock does not instantly adjust. Many people experience several days of sleep deprivation and circadian misalignment.

Even a modest sleep loss, as little as 30 to 60 minutes; can elevate stress hormones, increase blood pressure, impair concentration, and worsen insulin sensitivity. Over time, repeated disruptions contribute to obesity, diabetes, cardiovascular disease, and depression.

Supporters of Daylight-Saving Time often argue that longer evenings encourage outdoor activity and commerce. While those benefits may appear appealing, the evidence suggests they are modest at best and inconsistent across regions. What is consistent, however, is the documented strain on human biology caused by abrupt clock changes.

For a country like The Bahamas, the case for protecting sleep is even stronger. We live in a tropical environment with abundant natural sunlight year-round. Our geographic position already provides a healthy balance of daylight hours. We do not need artificial clock manipulation to enjoy the benefits of sunshine.

Instead, we should prioritise what truly protects our health: stable sleep patterns. When we align our lives with natural daylight cycles, we support better cardiovascular health, stronger immunity, improved mental clarity, and greater longevity.

If we are serious about preventing chronic illness in our nation, we must treat sleep as medicine.

The question before us is simple: should we continue sacrificing our health for the illusion of longer evenings?

As a physician who has raised this concern before, my answer remains clear.

Wellness begins with protecting sleep, and sometimes that means leaving the clock alone.