Four minutes a day, for 364 days, to find out what your body is actually doing.
Centurion Baseline is a measurement study. You measure grip, jump, balance, sleep and readiness each morning; the study keeps the record. There is no programme to follow and nothing to beat. You are rewarded for measuring, never for the number.
A year-long record of your own function, taken the same way every day.
Most people have no idea how their strength, power and balance change across a year. Clinics measure once; apps measure effort, not capacity. This study asks a small group of people to take the same handful of measurements every morning for a year, so that the shape of the change — not a single snapshot — becomes visible. Your data is yours. Nothing you record is visible to another participant.
Ten numbers, one screen, before you get on with the day.
Two grip squeezes, one jump, one balance test on each leg, then four things you already know: how you slept, how sore you are, how ready you feel, and whether you trained. It fits in the time it takes coffee to brew. Miss a day and the board says so — that is all it does.
364 squares, 13 blocks of 28.
Each square is a day. Teal is filled, faint teal is partly filled, amber outlines a benchmark day. The whole year sits on one screen, which is the point: consistency is the only thing on display.
Why the study is built out of 1, 7, 28, 84 and 364 days.
- 1 day
- The square. One four-minute session. The unit of the study — the thing you either did or didn't.
- 7 days
- The week. Enough days to see sleep and soreness move together. Five of seven counts as a full week.
- 28 days
- The block. A block is long enough for a real change in grip or jump to separate from noise.
- 84 days
- The quarter. Three blocks. The point at which a sealed forecast of your own trajectory is opened.
- 364 days
- The year. Thirteen blocks. A full seasonal cycle, so winter is compared with winter.
A year of your own data, and a forecast you cannot argue with.
Sparklines of every measure you take, from day one. A sealed forecast of your own trajectory, written by the study and opened at day 84, so you can see whether your sense of yourself matched the record. A CSV export of everything, at any time, without asking. And at the end, a baseline — the thing nobody has when they need it.
- Grip, both hands
- Hand dynamometer, kilograms
- Counter-movement jump
- Height in centimetres
- One-leg stance, eyes closed
- Seconds, each leg
- Sleep
- Hours
- Soreness and readiness
- 1 to 5, your own judgement
- Training
- Whether, how long, how hard (0-10)
- Sit-to-stand
- Five reps timed; power derived in W/kg
- 30-second chair stands
- Repetitions
- Maximal gait speed
- Metres per second over 4 m
- 2 km walk and 400 m walk
- Time and heart rate
No one can see anyone else's measurements — not now, not by request.
Your rows are locked to your account at the database level. The cohort view shows participation only: how many people are in, who logged today, how many squares exist between us. It carries no measurement of any kind, and there is no mechanism by which it could. Aggregate results may be published only in anonymised form, and only if you tick that box. You can withdraw at any time and choose whether your data is deleted or retained anonymised.
If you would keep a record for a year, you belong in this study.
Sign-in is by emailed link. There is no password.