Posts tagged: Morning Lark

The Chronotype Problem: Why Your Smart Ring's 'Optimal Bedtime' Is Wrong for Half the Population

Your smart ring tells you to sleep at 9:30 PM because your heart rate dropped. But it does not know whether your brain produces melatonin at 9:30 PM or midnight. Chronotype, the genetic wiring that makes you a lark or a night owl, is ignored by every bedtime guidance feature on the market.