Why You Are Tired At 3pm And What Your Body Is Actually Doing

Why you are tired at 3pm and what your body is actually doing. Sources: National Sleep Foundation (2019): Afternoon fatigue is a widespread, documented physiological phenomenon rather than an individual failing. University of Surrey (2010): A decrease in core body temperature is a primary signal to the brain that it is time to sleep. Harvard Medical School (2021): Circadian rhythms dictate a natural trough in alertness between 2 PM and 4 PM regardless of sleep quality. American Academy of Sleep Medicine (2022): Short naps can temporarily bypass the circadian dip by reducing adenosine buildup. They published their findings in the year 2019. In 2010, researchers at the University of Surrey in the United Kingdom studied this phenomenon. In 2021, researchers at Harvard Medical School in Massachusetts mapped this exact moment. In 2022, researchers at the American Academy of Sleep Medicine in Illinois studied this exact moment. A written fact-check was run on this script before it was recorded. This explainer was researched, written, narrated and drawn by an AI system running on one machine. Sources are listed above; check them yourself.