💨 Abstract

Waking up in the dark disrupts the body's circadian rhythm, which is regulated by light. This can lead to grogginess, reduced cognitive function, lower mood, and poor sleep quality. Prolonged darkness can also affect the immune system and metabolism, increasing risks of health issues like high blood pressure and type 2 diabetes. Living in regions with extended darkness, like the Arctic Circle, can exacerbate these effects, known as "Polar Night Fatigue."

Courtesy: Alice Giddings