BIOS Age
Every year in it, and what it came from.
Your calendar age, moved by five things the evidence supports. Every row names its study, and the rows always sum to the headline.
BISDone
Week of Sep 11● 27/28 d
Your body reads 33 this week
You’re reading 2.5 years older — cardio fitness is most of it.
332.5 years above calendar± 1.5 yr
What moves itrows sum to the headline
- Cardio fitnessVO₂max 42.3, measured+2.0
- Resting heart rate62 bpm at the wrist+0.5
- Daily movement7,953 steps a day, median0.0
- Sleep duration7h 30m average — in the sweet spot0.0
- Strength trainingno strength workouts · 40 min a week earns years back0.0
Sum+2.5
no error band without a fitness reading · 27/28 d
Recovery
It says what it saw.
Three daily readings, each out of 100, each stating what its 100 means and which signals it was built from.
BISDone
Fri, Sep 11
Recovery is bright today
Built from 3 measured signals, all of them.
HRV 50 ms and resting heart rate 60 bpm were in the strong range for your age. You slept 7h 30m.
A designed scale, not a study →The three signals
Heart-rate variability
ms overnight
50
100
Resting heart rate
bpm at rest
60
100
Sleep duration
last night
7h 30m
95
Sleep
What the number is made of.
Duration, efficiency, consistency. Weights renormalise over what was measured, so a missing component moves confidence — never the score.
BISDone
11:09 PM – 7:36 AM● 7h 30m
A solid night
You slept 7h 30m, 89% efficient.
What the score is made of
Duration
target 7–9 h
7h 30m
100
Efficiency
asleep while in bed
89%
100
Consistency
spread of bedtimes across 7 nights
100
Your day
Every hour the watch actually recorded.
Sleep, workouts and the stretches your watch actually recorded, hour by hour — with the gaps left as gaps.
BISDone
Today
September 2026
0006121824
asleepworkoutwatch onnot read yet
00:00 · Friday begins
Asleep · 7h 30m
Thu 23:34 → 07:46. Between 7 and 9 hours, where sleep costs your BIOS Age nothing.
07:46
8,963 · steps
Your age reads the middle of your last 28 days, so today alone barely moves it.
›
14:41 · so far
BISDone
Week of Sep 11● 27/28 d
Your body reads 33 this week
You’re reading 2.5 years older — cardio fitness is most of it.
332.5 years above calendar± 1.5 yr
What moves itrows sum to the headline
- Cardio fitnessVO₂max 42.3, measured+2.0
- Resting heart rate62 bpm at the wrist+0.5
- Daily movement7,953 steps a day, median0.0
- Sleep duration7h 30m average — in the sweet spot0.0
- Strength trainingno strength workouts · 40 min a week earns years back0.0
Sum+2.5
no error band without a fitness reading · 27/28 d
