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date, type, tags
date type tags
2026-09-10 sleep
sleep
late-bedtime
hrv-high-normal
deep-heavy
rem-low

Sleep — 2026-09-10

8h 26min · 00:10→08:56 · REM: 9% · Deep: 39% · HRV: 123 · Resting HR: 49 · Woke: 2× · Score: 91/100

Score 91 — new best in the log (beats 90 from Jul 20), better than 99% of users. No narrative given for the night. Watch advice: woke 2×, slightly above average; suggested meditating before bed.

Interpretation: The highest-scoring night on record, and it was built on deep sleep, not on duration or timing. Deep 39% (3h 15min) at 95-point continuity is the heaviest repair share since Sep 5, light 52% sits normal for the first time in three nights, and deep continuity 95 is the cleanest of the week. The shape is unmistakably repair-first: the body spent the night on tissue/immune work and shorted dreaming to pay for it — REM 9% (48 min) is the second consecutive night under 10% (Sep 8: 7%), which is still the Sep 7 crash-night (32ms, ~4h) being worked off rather than a new problem.

HRV 123ms lands high-normal, third night of the settle: 145 → 127 → 123. That is not a recovery failure — it's the bedtime ceiling. The two nights at 145 (Sep 2, Sep 8) both went to bed pre-midnight (23:50 / 22:59); Sep 9 and Sep 10 both went to bed at ~00:1000:25 and both landed in the 120s. Same story the scores don't capture: a late bedtime costs ~20 ms of HRV but, with 8h26 in bed, it doesn't dent the score at all. Resting HR 49 and SpO₂ 98% close it out — this is a genuinely recovered base.

(Curiosity, not signal: 00:10→08:56 is the exact clock of Sleep/2026-07-27 — same bedtime, same rise time, eight weeks apart.)

Metric Value Reference
Night sleep 8h 26min 6-10h (Normal)
Bed → Rise 00:10 → 08:56
Deep sleep 39% (3h 15min) 20-60% (Normal)
Light sleep 52% (4h 23min) <55% (Normal)
REM sleep 9% (48min) 10-30% (Low)
Deep sleep continuity 95 points 70-100 (Normal)
Times woke 2 times 0-1 (High)
Breathing quality 98 points 70-100 (Normal)
HRV 123ms 77-138ms (Within range, upper)
Resting HR 49 bpm 48-58 bpm (Within range, low)
SpO2 98% 97-99% (Within range)
Respiratory rate 14 brpm 12-16 brpm (Within range)
Score 91 / 100 Better than 99% — log best

HRV progression

Date HRV Context
Sep 6 74ms 0% beers ×4, home 01:11, residual illness
Sep 7 32ms Heavy night, ~4h sleep — near all-time low (chat-reported)
Sep 8 145ms 🚀 Sober, bed 22:59 (pre-midnight), 8h40 — ties all-time high
Sep 9 127ms Sober, bed 00:25, 7h37 — late-bedtime settle
Sep 10 123ms Sober, bed 00:10, 8h26 — best score yet, HRV ceiling = bedtime

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