§ 01
0WVI
Daily WVI baseline
The bracelet computes one score at dawn and one at dusk. We take the dawn number as the day-of-record. No cherry-picked peaks, no rolling averages designed to flatter.
§ 01 · How we track
Three signals. One honest line per day.
The case studies are boring on the inside — which is the whole point. We collect the same three things in the same way for every member, and we do not edit what we find.
§ 02
0weeks
Weekly journal entries
Every Sunday night, one prompt, 120 characters. What changed, what hurt, what felt lighter. Short enough to actually write, structured enough to compare.
§ 03
0checks
Monthly physiology panel
Once a month, a deeper pull — resting HR trend, HRV variance, sleep staging, stress-recovery ratio. Used to verify, not to sell.
§ 02 · The three cases
Three members. Ninety days. Nothing edited out.
Each case is the same structure: a narrative written in the member's own rhythm, four before/after numbers the bracelet recorded, and a three-point timeline of what actually moved.
§ Case 01 · Alex, 34, London, tech founder
From WVI 52 to 86 in ninety days.
Alex ran a fifty-person team on four hours of sleep and three espressos. The first week of data looked like a horror film: resting heart rate in the low eighties, HRV in the high thirties, sleep fragmented into ten-minute shards. The app wrote one sentence a day. It refused to be clever. On day nine it told him to stop taking calls after 21:00. On day twenty-three it told him the magnesium was working. By day ninety he had thirty-four WVI points back and a cardiologist who stopped worrying.
0 → 86
WVI
+34 points
0 → 56
HRV (ms)
+47%
0 → 92
Sleep efficiency (%)
+21 pts
0 → 64
Resting HR (bpm)
−18 bpm
- Day 1
Baseline, and it is ugly.
WVI 52. Seven of the eight sensors flag stress tier 4. The app asks one question: when did you last sleep more than six hours in a row?
- Day 30
Sleep first, everything else later.
One rule held: no calls after 21:00. HRV ticks up. Resting HR drops four beats. WVI is already at 68.
- Day 90
A different person on the same wrist.
WVI 86. Sleep window stable at 7h 40m. The cardiologist reads the PDF once and hands it back without comment.
§ Case 02 · Maria, 42, Madrid, schoolteacher
From WVI 58 to 81 through the menopausal transition.
Maria was told her symptoms were normal and to come back in a year. The bracelet disagreed with the word normal. Evening stress was running 52% higher than morning stress; sleep quality collapsed on the nights her classroom had cover duty. The app did not prescribe anything. It held up a mirror seven days in a row until she could see the pattern herself. Then it suggested one thing at a time — a cooler bedroom, a walk at dusk, a protein-forward dinner — and measured each.
0 → 81
WVI
+23 points
+0%
Sleep quality
90-day delta
−0%
Evening stress
vs. day 1
0 → 51
HRV (ms)
+19%
- Day 1
The word 'normal' stops being enough.
WVI 58. Evening stress twice the morning number. The app does not argue with her doctor — it just shows her the graph.
- Day 30
One lever at a time.
Cooler bedroom, walk at dusk, dinner earlier. Three interventions. Each one measured on its own line.
- Day 90
Sleeping through the night again.
WVI 81. Sleep quality up 41%. The symptoms did not vanish — they became manageable, measurable, and finally hers.
§ Case 03 · Jun, 51, Singapore, retired engineer
From WVI 48 to 79 and back into HIIT after an injury.
Jun tore a hamstring at forty-nine and never quite came back. The gym stopped being fun because he could not tell a good day from a bad one. The bracelet gave him a recovery score every morning and only two allowed verbs: push or rest. He stopped arguing with it at week three. By week six the HIIT class he had quit two years ago was on the calendar again. By week twelve he was finishing the class — not first, but finishing, which was the entire point.
0 → 79
WVI
+31 points
0 → 62
Resting HR (bpm)
−12 bpm
+0%
Recovery score
90-day delta
0 → 5
HIIT sessions / wk
sustainable
- Day 1
A retired body that won’t admit it.
WVI 48. Resting HR 74. The injury healed a year ago but the fear of re-tearing did not.
- Day 30
Push or rest. No third option.
The morning recovery score becomes the only thing he consults. Three weeks in, the bad-day guesses stop.
- Day 90
Finishing the class again.
WVI 79. Resting HR 62. Five HIIT sessions a week, cleared by the recovery score every single morning.
§ 03 · What moved across all three
Four numbers that show up every time.
Across three very different lives — a founder, a teacher, a retired engineer — the same four levers accounted for most of the score movement. The bracelet is not impressed by novelty.
+0 min
Sleep added
nightly median
+0 ms
HRV gained
90-day mean
−0%
Stress reduction
evening window
+0%
Active days
recovery-cleared
What wellness case studies usually hide
The before photo you never see.
Most case studies pick three good weeks, crop the bad days out of the graph, and forget to mention that two of five participants quit. The result looks like a miracle because the evidence has been tidied.
What we publish anyway
The days the score went the wrong way.
Every case here includes the weeks that did not work — a bad cold, a stressful quarter, a plateau. We keep them in because they are the reason the good weeks are credible. The bracelet never lies; neither do we.
Your ninety days
Three lives moved because the numbers stopped being optional.
The bracelet is waiting on the shelf. The first ninety days are the only ones that matter — and we will publish yours too, if you let us.