This floor-based mobility test differs from a chair sit-to-stand test. It carries a fall risk and is not appropriate for everyone.
Sit down on the floor and then stand back up, using as little support from your hands, knees, forearms or the sides of your legs as possible. Score starts at 10. Subtract one point for each hand, knee, forearm or side of the leg used to sit or to rise, and subtract half a point for visible loss of balance at any stage.
Do not attempt this test if you might fall, cannot get up safely, have pain or are unsure it is safe. Ask a clinician or physical therapist about an appropriate assessment.
The protocol and its mortality association come from de Brito et al., European Journal of Preventive Cardiology, 2014 — a study of over 2,000 adults aged 51 to 80 that followed participants for a median of about six years. Scores below 8 were associated with meaningfully higher all-cause mortality, and the association held after adjusting for age, sex and body mass index.
These observational findings do not establish that a score predicts an individual's outcome or that practicing the test changes mortality risk.
A score of 9 or 10 is treated as optimal, 7 to less than 9 as good, and 5 to less than 7 as borderline in the calculator's structural dial. These model bands are not a diagnosis.
The test combines strength, mobility and balance; a result is not an individual prediction of future independence.
Skip it if you have a recent joint replacement, significant balance impairment, uncontrolled vertigo, or any condition where a fall would be dangerous. Ask a clinician or physical therapist about a safe alternative; a chair-based sit-to-stand test measures something different and cannot be entered into this calculator as the floor test.
If you cannot do the floor version safely, leave this one blank rather than forcing it. Grip strength and waist-to-height ratio still score the structural dial without it.
If movement or balance is difficult, a clinician or physical therapist can help identify a safe, appropriate way to build strength and mobility.
Measuring three dials with no bloodwork · Grip strength by age and sex · The structural dial
Calculate your Longevity Score free →Score starts at 10. Sit down on the floor and stand back up using as little support as possible, subtracting one point for each hand, knee, forearm or side of the leg used, and half a point for visible loss of balance.
In a study of adults aged 51–80, lower scores were associated with higher mortality. An association does not predict an individual outcome.
Choose a question. Answers come from this site, and nothing you open is sent anywhere.
Score starts at 10. Sit down on the floor and stand back up using as little support as possible, subtracting one point for each hand, knee, forearm or side of the leg used, and half a point for visible loss of balance.
In a study of adults aged 51–80, lower scores were associated with higher mortality. An association does not predict an individual outcome.
Chronological age counts birthdays. Biological age estimates how old your body appears to be functioning, based on measurable biomarkers. Two people born the same year can differ by a decade or more in vascular stiffness, insulin signalling or cardiorespiratory fitness. Biological age makes that gap explicit — and unlike your birthday, it can move in either direction.
Each biomarker you enter is scored against longevity-optimised reference ranges and grouped into one of eight dials. Every dial produces its own biological age, and those are combined using fixed weights into a single composite, then expressed as a Longevity Score from 0 to 100. The weighting reflects how strongly each system predicts healthspan: structural and vascular carry the most, hormonal the least.
No. The short form contains a subset of scoring inputs plus context-only fields, and you can leave any of them blank. It is not a recommendation to obtain tests. Missing values are excluded from the calculation — never treated as zero or as 'normal'. A dial with no scored data is dropped entirely and the remaining weights renormalise.
Some inputs can be measured without bloodwork. Blood pressure needs a home cuff and waist-to-height needs a tape measure. Wearable estimates vary; the floor-based sitting-rising test carries a fall risk and should only be attempted if safe.
Both terms describe what this tool does, and which one fits depends on what you are asking. "Anti-aging" is the term most people search, and loosely means anything aimed at slowing or reversing age-related decline — this tool fits that description if you score your dials and act on what you find. "Healthspan calculator" is the more precise term: healthspan is the number of years lived without serious chronic disease or disability, and that cannot be measured directly, so this tool scores eight systems that each function as an early-warning proxy for it. Either way, the method is the same: real biomarkers, published thresholds, no vanity-metric framing.
Several popular tools ask only about habits — exercise days, sleep hours, smoking, diet quality — and return a single precise-looking age. We looked at the research behind that approach and chose not to build it. Published studies do show real, individually-measured links between specific habits and epigenetic age acceleration, but those effect sizes come from different study populations, different DNA-methylation clocks and different measurement units. Adding them together into one number is not something the underlying research actually supports — it produces a precise-looking result built on an imprecise method. Our dials use direct physiological measurements instead: a real blood pressure reading, a real VO₂ max, a real ApoB value. Several dials score from home-measurable data alone with no quiz-guessing involved — see what you can measure without a blood test, above.
Standard reference ranges describe what is common in a general population, which now includes a great deal of metabolic dysfunction. They are tuned to flag disease, not to identify what is optimal for a long healthspan. A fasting insulin of 20 µIU/mL sits inside most labs' normal range and is strongly associated with insulin resistance. This tool uses longevity-optimised thresholds instead, so a flag here means room for optimisation — not a diagnosis.
For understanding a single result, do — a frontier chat model is genuinely good at that, often clearer than most medical sites, and it handles markers no fixed tool covers. The limitation is different from the one most people assume. A language model produces a plausible response rather than a computed one, so the same panel can score differently on different days. That is fine when exploring an idea and disqualifying when measuring change, because you cannot tell how much of a difference is you and how much is the method. Use both: a chat model to understand, a fixed instrument to track.