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date, type, tags
date type tags
2026-09-13 sleep
sleep
post-concert-rebound
longest-night
rhr-low
rem-low

Sleep — 2026-09-13

9h 27min · 23:39→09:06 · REM: 9% · Deep: 20% · HRV: 119 · Resting HR: 47 · Woke: 0× · Score: 83/100

The longest night in the log. No narrative given — but the context is known: Friday's concert (0-drop flat shoes, hours of jumping, alcohol, bed after 3 am) made Saturday a fatigue day, and this was the rebound night before Sunday's attempted long run.

Interpretation: The volume is a record (9h27, 1h more than the previous best of 8h26) and the nervous system clearly took it: resting HR 47 bpm — below the personal range (4858) and the lowest reading in the log, with zero wake-ups and continuity 97. That is deep parasympathetic recovery, and it is why the run the next morning was decided by tissue, not by fatigue: HRV 119ms sits in the same 119127 band as the last four logged nights (145 → 127 → 123 → 119), and RHR was excellent — so nothing in this data says "too tired to run".

Architecture is the other half, and it's repair-shaped: deep 20% (1h 54min) at the bottom of the normal band and light sleep 71% (6h 40min) — the highest light share in the log — while REM 9% (53 min) makes it the third night in four under 10% (Sep 8: 7%, Sep 10: 9%). Breathing quality 100 and SpO₂ 98% rule out anything respiratory. The read: the body spent a long night on volume and shallow recovery rather than on dreaming, which is what a post-alcohol day looks like from the inside — and it's the same REM debt the Sep 10 note flagged, still not paid off.

Note the unlogged night: Sep 11→12 (the concert night) has no screenshot — so the alcohol signature is not in the data, only its consequences. This night is the rebound, not the cause.

Metric Value Reference
Night sleep 9h 27min 6-10h (Normal) — log longest
Bed → Rise 23:39 → 09:06
Deep sleep 20% (1h 54min) 20-60% (Normal, bottom)
Light sleep 71% (6h 40min) <55% (High)
REM sleep 9% (53min) 10-30% (Low)
Deep sleep continuity 97 points 70-100 (Normal)
Times woke 0 times 0-1 (Normal)
Breathing quality 100 points 70-100 (Normal)
HRV 119ms 78-138ms (Within range)
Resting HR 47 bpm 48-58 bpm (Below range — log low)
SpO2 98% 97-99% (Within range)
Respiratory rate 14 brpm 12-16 brpm (Within range)
Score 83 / 100 Better than 87% of users

HRV / RHR progression

Date HRV RHR Context
Sep 8 145ms 🚀 48 Sober, bed 22:59 — ties all-time high
Sep 9 127ms 50 Sober, bed 00:25
Sep 10 123ms 49 Sober, bed 00:10 — best score yet
Sep 11→12 Concert night, unlogged
Sep 13 119ms 47 🔽 Rebound night, bed 23:39, 9h27

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