Health: Causes of fatigue despite eight hours of sleep

Experiencing fatigue despite getting eight hours of sleep may be caused by poor sleep quality and specific daily habits rather than a lack of duration. Experts suggest that the depth and continuity of sleep are essential for physical and cognitive recovery.

Several lifestyle factors can contribute to persistent tiredness. Excessive smartphone use before bed exposes the brain to blue light, which disrupts sleep depth. Skipping breakfast can lead to sudden drops in blood sugar, while dehydration and prolonged sedentary behavior also drain energy levels. Additionally, consuming caffeine or alcohol in the evening can impair the ability to reach deep sleep stages.

Medical conditions and irregular schedules also play a role. Sleep apnea, characterized by interrupted breathing during the night, can prevent restorative rest and cause morning headaches or daytime drowsiness. Furthermore, inconsistent sleep schedules, often referred to as ‘social jet lag,’ disrupt the body’s internal clock. Maintaining a regular sleep-wake cycle and exposure to morning sunlight can help stabilize these rhythms.