Done it my whole life
3 years ago
No matter what time I go to bed, I wake up with out an alarm clock and just about exactly 4 to 4.5 hours after falling asleep. I never trained myself to do it, I just always have since I was young. I never feel tired. I don’t drink coffee and I don’t drink much of anything with caffiene in it or any other energy substitutes. I don’t do it on purpose.
