10% Happier with Dan Harris The Science of Sleep: Why You're up at 3AM — And Why Worrying About It Makes It Worse | Sara Mednick
40 snips
May 13, 2026 
Sara Mednick, cognitive neuroscientist and sleep researcher at UC Irvine and author of The Power of the Downstate, breaks down naps, the biology of restorative downstates, and when daytime practices can compensate for poor nighttime sleep. She discusses heart rate variability, timing melatonin, sex and touch for sleep onset, and practical tips like morning light and reducing evening blue light.
AI Snips
Chapters
Books
Transcript
Episode notes
Fix Daytime Habits To Improve Nighttime Sleep
- Treat daytime habits as part of sleep hygiene: schedule exercise earlier, avoid late eating, practice slow breathing, and take regular breaks.
- These daytime choices influence melatonin timing, sympathetic arousal, and your ability to switch into restorative sleep.
Boost HRV To Gain Sleep-Like Restorative Benefits
- Train heart rate variability (HRV) with slow breathing, meditation, yoga, or HRV biofeedback to boost parasympathetic restore functions.
- Improving HRV yields better attention, working memory, and executive control similar to some sleep benefits.
Carlos Stopped Waking At 3 AM By Changing His Routine
- Mednick describes a client, Carlos, conditioned to wake at 3 a.m. from years of middle-of-the-night travel and family cues.
- After moving, exercising every morning, and breaking travel patterns during the pandemic, his sleep problems disappeared.
