---
date: 2026-09-13
type: sleep
tags: [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 (48–58) 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 119–127 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 |

## Connected

- [[Runs/2026-09-13]] (the run this night powered — stopped by the ankle, not by the sleep)
- [[Sleep/2026-09-10]] (the 123ms/91-point night this follows)
- [[Sleep/2026-09-08]] (the 145ms pre-midnight record)