TL;DR Popular longevity claims get discussed as though they were one thing, when the strength of evidence behind them differs enormously. Sort them into four kinds and it becomes clear: the best-evidenced item is regular exercise, and it costs nothing; VO2max and grip strength are prognostic associations, not a rate at which pushing a number up buys you years. The expensive "anti-ageing" programmes have the widest evidence gap of all.
Four kinds of longevity claim — sort them before arguing about evidence
In the same conversation, "150 minutes of exercise a week" and "an anti-ageing injection" often get treated as the same kind of thing. They are not at the same level of evidence.
Below, the common items are sorted into four kinds. Each is anchored to its own source.
| Kind | Items and summary of the evidence |
|---|---|
| ① Behaviours with public health backing | Regular physical activity — the Department of Health recommends 150–300 minutes of moderate-intensity aerobic activity a week plus muscle strengthening on 2 days a week |
| ② Measures with observational prognostic associations | Cardiorespiratory fitness (VO2max) and grip strength are associated with lower all-cause mortality (large cohorts / the PURE study); prognostic association, not causation |
| ③ Practices under study | Zone 2 is a form of aerobic training; its rationale is consistent with the "cardiorespiratory fitness → mortality" line, but "specially optimal" is an inference, not demonstrated superiority |
| ④ Commercial trends and evidence gaps | Expensive "anti-ageing" programmes (of the Bryan Johnson kind), the boom in Asian longevity clinics — demand driven by an ageing population, but with a wide evidence gap, "public enthusiasm" outpacing the science |
Read from the top down, each kind rests on thinner evidence than the one above it. The more expensive the kind, the wider the evidence gap.
The best-evidenced item happens to be the free one
Regular physical activity. This is the only one of the four with direct backing from a public health authority.
The Department of Health's recommendation is quite specific: 150–300 minutes of moderate-intensity aerobic activity a week for adults, or 75–150 minutes of vigorous intensity, plus muscle strengthening on two days a week or more.
The value for money deserves saying plainly. You do not need any expensive programme to get the benefits with the firmest evidence behind them.
VO2max and grip strength: association is not causation
This is the sentence the article most wants you to keep: a higher VO2max and a stronger grip are associated with lower all-cause mortality — that is a prognostic association, not causation.
What supports it is large cohort studies and the PURE study. Both measure "what later happened to people whose numbers were high", not "what happens once you push a number up".
⚠️ So the claim that "raising VO2max by X% causally adds X years" is not something the sources can support.
The correct reading is this: these are health markers you can track. The lifestyle that improves them — regular exercise — is beneficial in itself, but a single number should not be treated as a guarantee of lifespan.
Is Zone 2 specially superior? The word "optimal" is an inference
The conclusion first: Zone 2 is one form of aerobic training.
Its rationale is consistent with the line that "cardiorespiratory fitness corresponds to lower mortality", and there is nothing wrong with that direction. One step further is a different matter: saying it is "specially optimal" is an inference drawn from that line, not a superiority that has been demonstrated.
Put another way: doing Zone 2 is doing aerobic training, and that holds; doing Zone 2 makes you live longer than other aerobic training has not been shown.
Aerobic work and lifting do not improve the same thing
Many people assume that "any exercise will do", but the two markers above have separate origins.
Aerobic activity improves cardiorespiratory fitness (VO2max); raising muscular strength (grip strength) needs resistance or muscle-strengthening training.
⚠️ Not every exercise programme necessarily improves both. That is exactly why the Department of Health's recommendation writes aerobic activity and muscle strengthening separately — you need both.
Supplements and "anti-ageing drugs": the evidence gap
Most supplements sold on a longevity claim (NMN, for instance) lack adequate evidence of anti-ageing efficacy in humans.
On prescription medicines the point has to be put harder: do not take prescription medicines on your own for the sole purpose of "living longer". Any off-label use should be decided by a qualified doctor on individual clinical need, evidence and risk.
The evidence on supplements item by item is set out in NMN, fish oil and vitamin D. This site recommends no supplement and no programme.
If you want to track your own numbers
VO2max can be estimated through exercise testing, and grip strength has simple measuring tools. Both numbers are obtainable.
But once you have them, remember the section above: the number is not the point; what improves it — regular exercise — is.
⚠️ Anyone with cardiovascular risk or a chronic condition should consult a doctor before starting a new exercise programme.
What to do next
- First get your weekly exercise up to the Department of Health's recommendation. Of the four kinds, only this one has direct backing from a public health authority.
- Do both aerobic and resistance training. They improve different markers, and doing one will not automatically improve the other.
- Treat VO2max and grip strength as trackable health markers, not as guarantees of lifespan. They are prognostic associations, not causes.
- If you have cardiovascular risk or a chronic condition, consult a doctor before starting a new exercise programme.
- If you are thinking of a supplement or a prescription medicine to "live longer", ask a doctor first. This site recommends no product and no course of treatment.
Frequently asked questions
If I raise my VO2max, will I live longer?
That is not something the sources support. A higher VO2max is associated with lower all-cause mortality, which is an observational prognostic association, and not the same as "raising the number causally extends life". It is a health marker you can track; the lifestyle that improves it is beneficial in itself, but a single number is not a guarantee of lifespan.
Is Zone 2 the most effective training for longevity?
Zone 2 is one form of aerobic training, and its rationale is consistent with "cardiorespiratory fitness corresponds to lower mortality". But "specially optimal" is an inference drawn from that line, not a demonstrated superiority. This article recommends no particular training method.
Can aerobic exercise build grip strength at the same time?
Not necessarily. Aerobic activity improves cardiorespiratory fitness; raising muscular strength needs resistance or muscle-strengthening training. Not every exercise programme improves both, which is why both need attention.
How much exercise should I do each week?
The Department of Health recommends 150–300 minutes of moderate-intensity aerobic activity a week for adults, or 75–150 minutes of vigorous intensity, plus muscle strengthening on two days a week or more.
Are supplements like NMN any use?
Most supplements sold on a longevity claim lack adequate evidence of anti-ageing efficacy in humans. This site recommends no supplement; the evidence item by item is in a separate article on this platform.
Can I take a prescription medicine myself to live longer?
No. Any off-label use should be decided by a qualified doctor on individual clinical need, evidence and risk, rather than taken on your own for the sole purpose of "living longer".
Are expensive longevity clinics and "anti-ageing" programmes worth it?
This article assesses no longevity clinic and no programme. What can be said is that this belongs to kind 4 of the four set out here: demand driven by an ageing population, but with a wide evidence gap, and "public enthusiasm" outpacing the science.
What this article does not state
- There is no overall rating across the four kinds. Each item is set out on its own source; the four kinds, and the items within them, are not ranked, and no combined verdict has been synthesised for them.
- This article assesses no longevity clinic, programme, supplement or course of treatment.
- Any conversion of "raising a number" into "so many years of life". The studies cited are observational prognostic associations, and a causal magnitude cannot be worked backwards from them.
- A direct comparison between Zone 2 and other forms of aerobic training. The sources cited here have not made that comparison.
- The standing of the longevity-clinic boom item. That item comes from financial-press reporting; it is cultural-trend background, not a basis for a medical conclusion.
- Hong Kong figures. None of the sources cited carries local Hong Kong statistics on cardiorespiratory fitness, grip strength or longevity clinics.
Sources and dates checked
- Centre for Health Protection physical activity recommendations (150–300 minutes of moderate intensity or 75–150 minutes of vigorous intensity a week, plus muscle strengthening on two days a week): https://www.chp.gov.hk/en/healthtopics/content/100200/8804.html. Retrieved: 2026-07-27.
- Association between cardiorespiratory fitness and all-cause mortality (large cohort): Mandsager et al., JAMA Network Open, 2018.
- Association between grip strength and mortality (the PURE study): Leong et al., "Prognostic value of grip strength", The Lancet, 2015.
- The boom in Asian longevity clinics ("public enthusiasm" outpacing the science; cultural-trend background, not a basis for a medical conclusion): Fortune, 2026-07-08, https://fortune.com/2026/07/08/asia-longevity-aging-population-science/. Retrieved: 2026-07-27. The phrase is quoted from the article's own headline, which reads "Asia's super-aging societies are sparking a boom in high-end longevity clinics—even if 'public enthusiasm' is outpacing the science".
This article was written from the sources listed above. It is about how the evidence sorts and how strong each kind is; which training you should do, and what tests you should have, it does not answer — if you have cardiovascular risk or a chronic condition, that is for a doctor to decide on your situation.
Further reading
- On this platform: NMN, fish oil and vitamin D
- Centre for Health Protection physical activity recommendations: chp.gov.hk
- On this platform: Intermittent fasting