The Mystery of People Who Sleep 4 Hours Without Fatigue
For decades, sleep experts have repeated the same rule: adults need seven to nine hours of sleep each night to stay healthy. Yet, scattered across the world, there exists a rare group of people who seem to break this biological law. They sleep just four hours per night and wake up alert, productive, and mentally sharp. No coffee dependence. No chronic fatigue. No health collapse. Are these people lying? Are they secretly napping? Or is human biology more flexible than we once believed? Modern biology and neuroscience now provide answers that surprise even seasoned researchers. The truth is both fascinating and deeply misunderstood. Who Are Natural Short Sleepers? Scientists call these individuals natural short sleepers . They are not insomniacs, night owls forced by work schedules, or people running on stress hormones. Instead, they naturally require less sleep to function optimally. ...