Do You Really Need 8 Hours of Sleep? | 25
Call Me Curious
Is the Apple Watch Really a Good Way to Measure Your Sleep?
sleep efficiency is the percentage of time you spend asleep while in bed. A lot of these devices tell you which stage of sleep you're in, and they are about like 90 % accurate for if you're asleep or awake. They use motion and heart rate data to estimate what's going on in your brain. Noadyo: I think i might actually need to look into these, ecause i assume that i'm sleeping well. But i can to tell you, i have these really, really intense dreams, like they almost feel like real life.
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