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Kory Mathewson
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Research Scientist
Research
Writing
Sleep
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Intervention date
Pre-window
Matched N nights
Prior 14 nights
Prior 30 nights
Full 2026 baseline
Oct 29 default
Live heart rate
Connecting to live Fitbit Air stream...
Cloud live (15s)
Pair Wrist BLE
Total sleep duration
Three-regime historical context
Sleep architecture stages
Night-by-night sleep duration
Stage composition shift
Sleep schedule window
Overnight beat-to-beat heart rate
Night
2026 sleep duration trajectory
Resting heart rate trend
Overnight heart rate variability (RMSSD)
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