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Summary for run
📔 Journal
Mentioned 18 days · avg mood 3.3/5 · last yesterday
Your body across 18 matching days with Garmin data
Body Battery high → low87 → 34
Sleep7.0h
Stress38
HRV66 ms
Resting HR53 bpm
Steps11,180
SpO₂96%
Respiration14 br/min
Deep sleep1.4h
Light sleep3.7h
REM sleep1.5h
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

18 matching days
Sun 23 Aug Journal 6.8h 68 ms 52 bpm 86 → 41 8,245 43 96% 14 br/min 1.4h 3.8h 1.4h 0.3hdetails

Matched run in this day's entry.

Body Battery high → low86 → 41
Sleep6.8h
Stress43
HRV68 ms
Resting HR52 bpm
Steps8,245
SpO₂96%
Respiration14 br/min
Deep sleep1.4h
Light sleep3.8h
REM sleep1.4h
Awake0.3h
Sat 22 Aug Journal · 2/5 6.8h 76 ms 50 bpm 84 → 29 13,411 35 96% 14 br/min 1.3h 3.5h 1.7h 0.4hdetails

Matched run in this day's entry.

Body Battery high → low84 → 29
Sleep6.8h
Stress35
HRV76 ms
Resting HR50 bpm
Steps13,411
SpO₂96%
Respiration14 br/min
Deep sleep1.3h
Light sleep3.5h
REM sleep1.7h
Awake0.4h
Wed 19 Aug Journal · 3/5 6.5h 72 ms 51 bpm 89 → 28 11,691 33 96% 14 br/min 1.3h 3.2h 1.6h 0.5hdetails

Matched run in this day's entry.

Body Battery high → low89 → 28
Sleep6.5h
Stress33
HRV72 ms
Resting HR51 bpm
Steps11,691
SpO₂96%
Respiration14 br/min
Deep sleep1.3h
Light sleep3.2h
REM sleep1.6h
Awake0.5h
Tue 18 Aug Journal · 3/5 6.1h 74 ms 52 bpm 90 → 30 13,825 35 96% 14 br/min 1.3h 3.2h 1.2h 0.4hdetails

Matched run in this day's entry.

Body Battery high → low90 → 30
Sleep6.1h
Stress35
HRV74 ms
Resting HR52 bpm
Steps13,825
SpO₂96%
Respiration14 br/min
Deep sleep1.3h
Light sleep3.2h
REM sleep1.2h
Awake0.4h
Sat 15 Aug Journal · 3/5 6.7h 71 ms 53 bpm 88 → 46 7,591 44 96% 14 br/min 1.4h 3.1h 1.7h 0.6hdetails

Matched run in this day's entry.

Body Battery high → low88 → 46
Sleep6.7h
Stress44
HRV71 ms
Resting HR53 bpm
Steps7,591
SpO₂96%
Respiration14 br/min
Deep sleep1.4h
Light sleep3.1h
REM sleep1.7h
Awake0.6h
Thu 13 Aug Journal · 4/5 7.1h 65 ms 50 bpm 95 → 33 13,291 39 96% 14 br/min 1.2h 4.0h 1.5h 0.3hdetails

Matched run in this day's entry.

Body Battery high → low95 → 33
Sleep7.1h
Stress39
HRV65 ms
Resting HR50 bpm
Steps13,291
SpO₂96%
Respiration14 br/min
Deep sleep1.2h
Light sleep4.0h
REM sleep1.5h
Awake0.3h
Mon 10 Aug Journal · 2/5 7.6h 72 ms 53 bpm 93 → 28 14,091 35 96% 14 br/min 1.6h 4.0h 1.5h 0.5hdetails

Matched run in this day's entry.

Body Battery high → low93 → 28
Sleep7.6h
Stress35
HRV72 ms
Resting HR53 bpm
Steps14,091
SpO₂96%
Respiration14 br/min
Deep sleep1.6h
Light sleep4.0h
REM sleep1.5h
Awake0.5h
Sat 8 Aug Journal · 3/5 7.3h 65 ms 52 bpm 89 → 26 13,038 36 96% 14 br/min 1.6h 3.8h 1.5h 0.3hdetails

Matched run in this day's entry.

Body Battery high → low89 → 26
Sleep7.3h
Stress36
HRV65 ms
Resting HR52 bpm
Steps13,038
SpO₂96%
Respiration14 br/min
Deep sleep1.6h
Light sleep3.8h
REM sleep1.5h
Awake0.3h
Mon 3 Aug Journal · 5/5 7.6h 70 ms 51 bpm 86 → 23 11,305 38 96% 14 br/min 1.6h 4.0h 1.5h 0.5hdetails

Matched run in this day's entry.

Body Battery high → low86 → 23
Sleep7.6h
Stress38
HRV70 ms
Resting HR51 bpm
Steps11,305
SpO₂96%
Respiration14 br/min
Deep sleep1.6h
Light sleep4.0h
REM sleep1.5h
Awake0.5h
Thu 30 Jul Journal · 3/5 7.6h 70 ms 53 bpm 82 → 40 7,820 39 96% 14 br/min 1.3h 4.0h 1.8h 0.5hdetails

Matched run in this day's entry.

Body Battery high → low82 → 40
Sleep7.6h
Stress39
HRV70 ms
Resting HR53 bpm
Steps7,820
SpO₂96%
Respiration14 br/min
Deep sleep1.3h
Light sleep4.0h
REM sleep1.8h
Awake0.5h
Sat 25 Jul Journal · 5/5 6.5h 64 ms 52 bpm 83 → 27 13,640 35 96% 14 br/min 1.3h 3.6h 1.3h 0.3hdetails

Matched run in this day's entry.

Body Battery high → low83 → 27
Sleep6.5h
Stress35
HRV64 ms
Resting HR52 bpm
Steps13,640
SpO₂96%
Respiration14 br/min
Deep sleep1.3h
Light sleep3.6h
REM sleep1.3h
Awake0.3h
Tue 21 Jul Journal · 5/5 6.8h 63 ms 53 bpm 87 → 38 9,274 40 96% 15 br/min 1.4h 3.7h 1.4h 0.3hdetails

Matched run in this day's entry.

Body Battery high → low87 → 38
Sleep6.8h
Stress40
HRV63 ms
Resting HR53 bpm
Steps9,274
SpO₂96%
Respiration15 br/min
Deep sleep1.4h
Light sleep3.7h
REM sleep1.4h
Awake0.3h
Wed 15 Jul Journal · 4/5 6.8h 65 ms 56 bpm 88 → 49 8,860 45 96% 14 br/min 1.2h 3.9h 1.6h 0.2hdetails

Matched run in this day's entry.

Body Battery high → low88 → 49
Sleep6.8h
Stress45
HRV65 ms
Resting HR56 bpm
Steps8,860
SpO₂96%
Respiration14 br/min
Deep sleep1.2h
Light sleep3.9h
REM sleep1.6h
Awake0.2h
Tue 7 Jul Journal 7.1h 61 ms 56 bpm 90 → 43 9,380 39 96% 14 br/min 1.6h 3.7h 1.6h 0.3hdetails

Matched run in this day's entry.

Body Battery high → low90 → 43
Sleep7.1h
Stress39
HRV61 ms
Resting HR56 bpm
Steps9,380
SpO₂96%
Respiration14 br/min
Deep sleep1.6h
Light sleep3.7h
REM sleep1.6h
Awake0.3h
Mon 29 Jun Journal · 1/5 7.4h 58 ms 53 bpm 84 → 28 12,983 36 96% 14 br/min 1.4h 4.0h 1.4h 0.6hdetails

Matched run in this day's entry.

Body Battery high → low84 → 28
Sleep7.4h
Stress36
HRV58 ms
Resting HR53 bpm
Steps12,983
SpO₂96%
Respiration14 br/min
Deep sleep1.4h
Light sleep4.0h
REM sleep1.4h
Awake0.6h
Sun 21 Jun Journal · 3/5 7.9h 57 ms 56 bpm 85 → 40 8,217 43 96% 14 br/min 1.5h 3.9h 1.9h 0.6hdetails

Matched run in this day's entry.

Body Battery high → low85 → 40
Sleep7.9h
Stress43
HRV57 ms
Resting HR56 bpm
Steps8,217
SpO₂96%
Respiration14 br/min
Deep sleep1.5h
Light sleep3.9h
REM sleep1.9h
Awake0.6h
Wed 10 Jun Journal · 3/5 6.8h 56 ms 56 bpm 86 → 29 11,608 34 96% 14 br/min 1.5h 3.3h 1.5h 0.5hdetails

Matched run in this day's entry.

Body Battery high → low86 → 29
Sleep6.8h
Stress34
HRV56 ms
Resting HR56 bpm
Steps11,608
SpO₂96%
Respiration14 br/min
Deep sleep1.5h
Light sleep3.3h
REM sleep1.5h
Awake0.5h
Wed 27 May Journal 7.3h 54 ms 56 bpm 88 → 30 12,967 35 96% 14 br/min 1.4h 3.5h 1.8h 0.6hdetails

Matched run in this day's entry.

Body Battery high → low88 → 30
Sleep7.3h
Stress35
HRV54 ms
Resting HR56 bpm
Steps12,967
SpO₂96%
Respiration14 br/min
Deep sleep1.4h
Light sleep3.5h
REM sleep1.8h
Awake0.6h
Biometrics on the days you mentioned run
18 days you mentioned it in the last 365 · Garmin data on 90 of 365 days
Window: 90d 180d 365d  ·  Effect: same day night after
💓 Resting HR −1.6bpm same day (n=18 — likely a real pattern)
❤️ HRV +3ms same day (n=18 — likely a real pattern)
Deeper analysis — significance, timelines, dose-response & more
💓 Resting HR
−1.6bpm
52.9 vs 54.4bpm
n=18 / 72
likely a real pattern
Resting HR (bpm)
baseline   Resting HR days
❤️ HRV
+3ms
65.6 vs 62.5ms
n=18 / 72
likely a real pattern
HRV (ms)
baseline   HRV days
😖 Stress
−1
38 vs 39
n=18 / 72
within your normal variation
Stress
baseline   Stress days
1 metric unchanged on these days: Sleep.
💓 Resting HRavg 54 bpm · latest 53 bpm
49.5151.9554.3956.8459.28May 27Jun 18Jul 10Aug 1Aug 24
On your mention days: 53 bpm · −2 vs baseline
Hide graph
💓 Resting HR over time — orange = your mention days
When does it land? — Sleep Stress HRV Resting HR
The lighter bars are your baseline average (54.4bpm ± 2.3 sd). Days from a day you mentioned it (0 = the day itself); where the Resting HR bar clears baseline is where the effect lands.
📔 Mood on the days you mentioned it
Mood coupling — does your mood track Resting HR on these days? (r=-0.05, n=15)1234549.5151.0452.5754.155.63Resting HR (bpm)Mood
Each dot is a mention day: that day's Resting HR vs the mood you logged.
Rhythm — when do these days fall? (longest run 2 days · typically every ~4 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 33% of these days vs 12% otherwise — you train more often than usual. Average 14.6 min vs 5.7 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
2026-08-18 ↗ 🛌 Sleep −1h (1.5 sd from normal)
2026-08-19 ↗ 😖 Stress −5.6 (1.5 sd from normal)
2026-08-22 ↗ ❤️ HRV +12.4ms (1.5 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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