Longstanding vs WHOOP Age and Pace of Aging
WHOOP’s Healthspan turns nine tracked metrics into a WHOOP Age and a Pace of Aging. Longstanding measures ten capabilities directly, each against published norms and the line for 85.
Checked against WHOOP Age’s own pages on
The short answer
WHOOP Age is a model: nine things the strap and app already track, mapped to published mortality risks and combined into one age and a pace. Longstanding is a measurement: can you stand on one leg with your eyes closed, how fast do you stand up five times, how far can you carry half your body weight, and are those on the line for 85. One tells you how your habits add up; the other tells you what your body can do today. People who want both can read the app’s VO₂max test from a connected health platform.
What WHOOP Age is
WHOOP describes Healthspan as two metrics. WHOOP Age is “a harder metric to move” that updates gradually and gives a long-term view of physiological health; Pace of Aging is “a dynamic score, reflecting the immediate impact of your lifestyle choices”. The feature was developed with the Buck Institute for Research on Aging.
WHOOP says the nine inputs are sleep consistency, hours of sleep, time in heart rate zones 1–3 and 4–5, strength training, steps, VO₂max, resting heart rate and lean body mass, and that the algorithm maps each contributor to published hazard ratios for all-cause mortality, then corrects for overlap so no habit is double-counted. It is available with certain WHOOP memberships and not to people under 18.
Side by side
| Longstanding | WHOOP Age | |
|---|---|---|
| What it measures | Ten field tests you do yourself: single-leg stand, 5× sit-to-stand, floor sit-and-rise, grip, dead hang, push-ups, farmer carry, VO₂max, zone 2 minutes and a four-flight stair climb. | A modelled age and pace from nine tracked inputs: sleep, heart-rate zones, strength training, steps, VO₂max, resting heart rate and lean body mass. |
| How often | A baseline, then a re-test every quarter. Nothing is measured in between. | Continuously; WHOOP Age moves slowly and Pace of Aging day to day. |
| Reference | Each result is a percentile against a named published table for your age and sex, labelled estimated where no clinical table exists, and read against the line you need today for your age-85 goal. | Published hazard ratios for all-cause mortality, combined by WHOOP’s algorithm. The weights are WHOOP’s. |
| What you can see | Every input is a test you did, with its own percentile and line. | One age and one pace, with the contributors shown as WHOOP presents them. |
| Where the data lives | On your phone, with an optional iCloud or Google backup. No account and no server for your results. | On WHOOP’s servers, under a membership. |
| What you need | A timer, a chair, a wall, a bar, two weights and a staircase. A grip dynamometer for one test. A watch is optional, for VO₂max and zone 2. | A WHOOP strap worn around the clock and a membership that includes Healthspan. |
| Cost shape | The baseline is free. One purchase, or a yearly one, unlocks re-tests, backcast lines and history. | A subscription membership. |
| The age-85 question | The point of the app: every test has a line for 85, worked backwards to today. | A lower WHOOP Age is the goal; the feature is not framed around what you will be able to do at a given age. |
The big difference
WHOOP’s model rests on the same kind of research as Longstanding’s science pages: cohort studies linking VO₂max, steps, strength training and resting heart rate to mortality. The difference is what each product does with it. WHOOP combines the inputs into a single age by its own weighting. Longstanding will not combine them, because the research is about separate things, each is measured differently, and the useful action is specific: a slow sit-to-stand and a low VO₂max call for different training.
The other difference is what counts as data. WHOOP measures what the strap can sense, so strength is “strength training logged”, not strength. Longstanding measures the capability itself: grip in kilograms, a hang in seconds, a carry in metres, a floor rise with or without a hand. That takes a quarterly session with a stopwatch; it is not passive.
Where WHOOP Age is the better choice
If you want to see how sleep, training and daily activity add up to a long-term trend without ever running a test, WHOOP does that, with a daily pace you can act on and a membership that includes coaching around it. Its strength is the week-in, week-out picture.
Longstanding is not for you if
You want recovery, sleep and daily strain tracked for you. The app has none of that; it is a quarterly benchmark, not a daily companion.
The research behind this page
- Recent meta-analyses agree: each extra MET goes with 11–17% lower mortality, and high fitness roughly halves it
- Mortality risk keeps falling up to about 6,000–8,000 steps a day at 60+, and 8,000–10,000 under 60
- Muscle-strengthening activity is linked to 10–17% lower mortality, with the largest drop at 30–60 minutes a week
- In adults in their 70s, strength predicted death and muscle mass did not
Everything on this page about the other product was read off its own pages on the date shown. Prices are not listed, because they change and a stale one would mislead.