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Back to AMA with sleep expert Matthew Walker, with Matthew Walker.

Can Sleep Trackers Tell Which Stage You Are in?

The devices are good at estimating duration of sleep, but not the stage of sleep. They are good at detecting the two class algorithm-- total sleep time, awake or asleep. They fail at detecting the four class model-- whether someone is awake, in light or deep non-REM sleep, or in REM sleep.

Transcript

AMA with sleep expert Matthew Walker ·

The Peter Attia Drive

More from this episode

  1. Who Is Dr. Matthew WalkerDr. Matthew Walker is a professor of neuroscience and psychology at University of California, Berkeley.
  2. Why Does Eating Carbs Before Bed Make It Harder to SleepYou need to drop your core body temperature about 2 to 3 degrees to initiate sleep and to stay asleep.
  3. What Is the Optimum Time to Stop Eating Before BedAbout 3 hours before bed. When you lie down, you’re more likely to experience acid reflux and have digestive issues.
  4. Can Exercising Before Bed Backfire on Your SleepYes. Sleep profoundly helps exercise. Moderate to strong evidence agrees that exercise affects sleep because, you’ll have an increase in core body temperature.
  5. What Happens When Your Body Undergoes Sleep DeprivationA fake starvation signal is transmitted to your brain. It will think the body is undergoing a starvation condition, but it isn't.

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Featured in: The Science of Sleep: What Matthew Walker and Other Experts Say on Podcasts

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