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Summary for run
📔 Journal
Mentioned 17 days · avg mood 3.1/5 · last 2d ago
Your body across 17 matching days with Garmin data
Body Battery high → low89 → 35
Sleep7.3h
Stress38
HRV66 ms
Resting HR53 bpm
Steps11,172
SpO₂96%
Respiration14 br/min
Deep sleep1.4h
Light sleep3.8h
REM sleep1.6h
Awake0.4h
Backward test Forward test

Two ways to test a hunch: a backward test analyses the history you already have, and a forward test (an experiment) watches it play out from today. Same question, same stats — two lenses.

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Timeline

17 matching days
Sat 22 Aug Journal · 3/5 7.2h 72 ms 54 bpm 83 → 38 7,552 43 96% 14 br/min 1.5h 4.0h 1.4h 0.2hdetails

Matched run in this day's entry.

Body Battery high → low83 → 38
Sleep7.2h
Stress43
HRV72 ms
Resting HR54 bpm
Steps7,552
SpO₂96%
Respiration14 br/min
Deep sleep1.5h
Light sleep4.0h
REM sleep1.4h
Awake0.2h
Wed 19 Aug Journal · 3/5 7.8h 73 ms 54 bpm 91 → 46 9,165 42 96% 14 br/min 1.7h 3.8h 1.8h 0.5hdetails

Matched run in this day's entry.

Body Battery high → low91 → 46
Sleep7.8h
Stress42
HRV73 ms
Resting HR54 bpm
Steps9,165
SpO₂96%
Respiration14 br/min
Deep sleep1.7h
Light sleep3.8h
REM sleep1.8h
Awake0.5h
Tue 18 Aug Journal · 4/5 7.1h 75 ms 50 bpm 91 → 35 12,998 35 96% 14 br/min 1.3h 3.7h 1.7h 0.4hdetails

Matched run in this day's entry.

Body Battery high → low91 → 35
Sleep7.1h
Stress35
HRV75 ms
Resting HR50 bpm
Steps12,998
SpO₂96%
Respiration14 br/min
Deep sleep1.3h
Light sleep3.7h
REM sleep1.7h
Awake0.4h
Sat 15 Aug Journal 6.1h 74 ms 52 bpm 85 → 26 13,532 37 96% 14 br/min 1.3h 2.9h 1.4h 0.5hdetails

Matched run in this day's entry.

Body Battery high → low85 → 26
Sleep6.1h
Stress37
HRV74 ms
Resting HR52 bpm
Steps13,532
SpO₂96%
Respiration14 br/min
Deep sleep1.3h
Light sleep2.9h
REM sleep1.4h
Awake0.5h
Thu 13 Aug Journal · 2/5 6.8h 68 ms 51 bpm 93 → 36 11,932 38 96% 13 br/min 1.3h 3.9h 1.3h 0.3hdetails

Matched run in this day's entry.

Body Battery high → low93 → 36
Sleep6.8h
Stress38
HRV68 ms
Resting HR51 bpm
Steps11,932
SpO₂96%
Respiration13 br/min
Deep sleep1.3h
Light sleep3.9h
REM sleep1.3h
Awake0.3h
Tue 11 Aug Journal 7.7h 72 ms 53 bpm 90 → 32 13,398 34 96% 14 br/min 1.7h 3.8h 1.7h 0.5hdetails

Matched run in this day's entry.

Body Battery high → low90 → 32
Sleep7.7h
Stress34
HRV72 ms
Resting HR53 bpm
Steps13,398
SpO₂96%
Respiration14 br/min
Deep sleep1.7h
Light sleep3.8h
REM sleep1.7h
Awake0.5h
Fri 7 Aug Journal · 4/5 7.7h 64 ms 50 bpm 92 → 34 13,456 36 96% 14 br/min 1.3h 4.1h 1.8h 0.4hdetails

Matched run in this day's entry.

Body Battery high → low92 → 34
Sleep7.7h
Stress36
HRV64 ms
Resting HR50 bpm
Steps13,456
SpO₂96%
Respiration14 br/min
Deep sleep1.3h
Light sleep4.1h
REM sleep1.8h
Awake0.4h
Tue 4 Aug Journal · 3/5 7.2h 67 ms 51 bpm 94 → 35 12,656 33 96% 14 br/min 1.4h 4.1h 1.4h 0.3hdetails

Matched run in this day's entry.

Body Battery high → low94 → 35
Sleep7.2h
Stress33
HRV67 ms
Resting HR51 bpm
Steps12,656
SpO₂96%
Respiration14 br/min
Deep sleep1.4h
Light sleep4.1h
REM sleep1.4h
Awake0.3h
Fri 31 Jul Journal · 4/5 6.7h 66 ms 53 bpm 100 → 48 9,445 43 96% 14 br/min 1.1h 3.5h 1.5h 0.5hdetails

Matched run in this day's entry.

Body Battery high → low100 → 48
Sleep6.7h
Stress43
HRV66 ms
Resting HR53 bpm
Steps9,445
SpO₂96%
Respiration14 br/min
Deep sleep1.1h
Light sleep3.5h
REM sleep1.5h
Awake0.5h
Sun 26 Jul Journal 7.9h 65 ms 53 bpm 84 → 40 7,963 41 96% 14 br/min 1.4h 4.0h 1.9h 0.5hdetails

Matched run in this day's entry.

Body Battery high → low84 → 40
Sleep7.9h
Stress41
HRV65 ms
Resting HR53 bpm
Steps7,963
SpO₂96%
Respiration14 br/min
Deep sleep1.4h
Light sleep4.0h
REM sleep1.9h
Awake0.5h
Mon 20 Jul Journal · 2/5 6.9h 69 ms 54 bpm 88 → 26 14,063 36 96% 14 br/min 1.5h 3.6h 1.5h 0.3hdetails

Matched run in this day's entry.

Body Battery high → low88 → 26
Sleep6.9h
Stress36
HRV69 ms
Resting HR54 bpm
Steps14,063
SpO₂96%
Respiration14 br/min
Deep sleep1.5h
Light sleep3.6h
REM sleep1.5h
Awake0.3h
Tue 14 Jul Journal · 2/5 7.4h 67 ms 52 bpm 87 → 24 13,917 34 96% 14 br/min 1.4h 4.0h 1.8h 0.2hdetails

Matched run in this day's entry.

Body Battery high → low87 → 24
Sleep7.4h
Stress34
HRV67 ms
Resting HR52 bpm
Steps13,917
SpO₂96%
Respiration14 br/min
Deep sleep1.4h
Light sleep4.0h
REM sleep1.8h
Awake0.2h
Tue 7 Jul Journal · 3/5 7.6h 61 ms 53 bpm 90 → 43 9,270 42 96% 14 br/min 1.5h 4.1h 1.8h 0.2hdetails

Matched run in this day's entry.

Body Battery high → low90 → 43
Sleep7.6h
Stress42
HRV61 ms
Resting HR53 bpm
Steps9,270
SpO₂96%
Respiration14 br/min
Deep sleep1.5h
Light sleep4.1h
REM sleep1.8h
Awake0.2h
Tue 30 Jun Journal · 4/5 8.0h 64 ms 55 bpm 93 → 47 6,899 43 96% 14 br/min 1.4h 4.2h 1.9h 0.5hdetails

Matched run in this day's entry.

Body Battery high → low93 → 47
Sleep8.0h
Stress43
HRV64 ms
Resting HR55 bpm
Steps6,899
SpO₂96%
Respiration14 br/min
Deep sleep1.4h
Light sleep4.2h
REM sleep1.9h
Awake0.5h
Sat 20 Jun Journal · 4/5 7.2h 55 ms 54 bpm 84 → 21 13,412 36 96% 14 br/min 1.4h 3.9h 1.4h 0.5hdetails

Matched run in this day's entry.

Body Battery high → low84 → 21
Sleep7.2h
Stress36
HRV55 ms
Resting HR54 bpm
Steps13,412
SpO₂96%
Respiration14 br/min
Deep sleep1.4h
Light sleep3.9h
REM sleep1.4h
Awake0.5h
Wed 10 Jun Journal 6.6h 56 ms 56 bpm 84 → 26 13,371 33 96% 14 br/min 1.3h 3.5h 1.6h 0.2hdetails

Matched run in this day's entry.

Body Battery high → low84 → 26
Sleep6.6h
Stress33
HRV56 ms
Resting HR56 bpm
Steps13,371
SpO₂96%
Respiration14 br/min
Deep sleep1.3h
Light sleep3.5h
REM sleep1.6h
Awake0.2h
Thu 28 May Journal · 2/5 7.6h 53 ms 59 bpm 87 → 43 6,890 45 96% 14 br/min 1.5h 3.8h 1.9h 0.4hdetails

Matched run in this day's entry.

Body Battery high → low87 → 43
Sleep7.6h
Stress45
HRV53 ms
Resting HR59 bpm
Steps6,890
SpO₂96%
Respiration14 br/min
Deep sleep1.5h
Light sleep3.8h
REM sleep1.9h
Awake0.4h
Biometrics on the days you mentioned run
17 days you mentioned it in the last 365 · Garmin data on 90 of 365 days
Window: 90d 180d 365d  ·  Effect: same day night after
❤️ HRV +3.5ms same day (n=17 — likely a real pattern)
🛌 Sleep +0.3h same day (n=17 — likely a real pattern)
💓 Resting HR −1.1bpm same day (n=17 — weak hint)
Deeper analysis — significance, timelines, dose-response & more
❤️ HRV
+3.5ms
65.9 vs 62.4ms
n=17 / 73
weekday-matched
likely a real pattern
HRV (ms)
baseline   HRV days
🛌 Sleep
+0.3h
7.3 vs 7h
n=17 / 73
weekday-matched
likely a real pattern
Sleep (h)
baseline   Sleep days
💓 Resting HR
−1.1bpm
53.2 vs 54.3bpm
n=17 / 73
weekday-matched
weak hint
Resting HR (bpm)
baseline   Resting HR days
1 metric unchanged on these days: Stress.
❤️ HRVavg 63 ms · latest 67 ms
50.5256.9463.3669.7976.21May 27Jun 18Jul 10Aug 1Aug 24
On your mention days: 66 ms · +3 vs baseline
Hide graph
❤️ HRV over time — orange = your mention days
When does it land? — Sleep Stress HRV Resting HR
The lighter bars are your baseline average (62.4ms ± 5.6 sd). Days from a day you mentioned it (0 = the day itself); where the HRV bar clears baseline is where the effect lands.
📔 Mood on the days you mentioned it
Mood coupling — does your mood track HRV on these days? (r=0.05, n=13)1234552.7158.2963.8669.4475.02HRV (ms)Mood
Each dot is a mention day: that day's HRV vs the mood you logged.
Rhythm — when do these days fall? (longest run 2 days · typically every ~5 days)
Cohort days by weekday. A lopsided strip means the effect might be a weekday pattern — the stats above already switch to a weekday-matched baseline when that happens.
Exercise — do you train differently on these days?
You worked out on 35% of these days vs 12% otherwise — you train more often than usual. Average 15.8 min vs 5.6 min per day.
From your Garmin activities — a possible confound for the biometric changes above.
Notable days — the most unusual cohort days, worth re-reading
2026-05-28 ↗ 💓 Resting HR +5bpm (1.8 sd from normal)
2026-08-18 ↗ ❤️ HRV +11.9ms (1.2 sd from normal)
2026-08-15 ↗ 🛌 Sleep −0.9h (1.2 sd from normal)
Opens that day in your journal — the numbers point you there; the words stay in your vault.
How this is computed
Your cohort is the days you mentioned run. Each metric's average on those days is compared with every other day in the window that has Garmin data (your baseline). The significance chip comes from a permutation test — 1,000 random reshuffles of which days are cohort days; a pattern is flagged only when the real difference beats most reshuffles (and you have at least 8 cohort days). "The night after" shifts the comparison to the following day. When your cohort clusters on certain weekdays, the baseline is restricted to those weekdays.
Correlations from your own logs — not causation. Mentioning or taking something once is easily noise at small n. Garmin daily rollups only; your journal prose never leaves your vault.
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