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Sleep tracking data explained pt.1 😴 Time in bed ≠ sleep time. REM sleep stays stable with age (16%+), but deep sleep declines sharply. Know your numbers to optimize your rest. #SleepScience #SleepTracking

Matt Walker

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30,293 views • 7 months ago •via X (Twitter)

#SleepScience #SleepTracking

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