Donner de son temps pour aider les autres est l'une des habitudes les moins contraignantes associées à une vie plus longue et meilleure, et cela ne coûte que les heures. À travers les études sur les personnes âgées, les bénévoles avaient environ un quart de risque en moins de mourir au cours du suivi. L'aide va aussi de pair avec moins de dépression, moins de solitude, une pensée plus stable en fin de vie, et une pression artérielle plus basse. La plupart de ces preuves sont observationnelles, si bien que le sens de la causalité n'est pas établi : les personnes les plus en bonne santé et les mieux entourées sont aussi celles qui font du bénévolat, ce qui gonfle les chiffres bruts.
Ce qui est assez clair pour agir : aider comporte peu de risques. Un essai randomisé chez des personnes âgées a fait bouger la cognition et l'activité physique, et le bénéfice sur la survie est le plus fort lorsque le motif est tourné vers autrui. Les leviers probables sont le lien, le sens, l'activité et le sentiment de compter.
Findings & Outcomes
What It Is
Volunteering is giving your time to help other people on a basis that repeats. That can run through a group that keeps a record, a school, a hospital, or a food bank. It can also be informal, minding a grandchild or checking on someone who lives alone. Most health research counts the formal kind, because the hours are easy to log. The informal kind is far more common, and probably does much of the same work. The evidence splits one way: most of it observes people who already volunteer; only a randomized handful assigns people to it.
Anatomy of the Practice
1What counts as helping
Formal volunteering means giving time through a group that records it: a school, a hospital, a food bank, a charity, on a set schedule. Informal helping is the same impulse without the schedule, like minding a grandchild, driving a neighbor, or sitting with someone who lives alone. The two forms carry the same connection, purpose, and activity.
2The act of giving time
A single stretch of helping puts you in company, structures your time, and asks something useful of you. That is the raw material for everything that follows, and reading about a cause online does not supply it.
3A commitment that repeats
Showing up to the same place on the same day turns a one-off into a role. The strongest signals came from measures of regular participation over months and years. A standing slot beats an occasional grand gesture.
What It Does
The broadest finding repeats across large samples in several countries. People who volunteer report less depression and more life satisfaction, less loneliness, better self-rated health, fewer everyday physical limits, and lower blood pressure. They also die at lower rates over follow-up, even after health is accounted for, a pattern that holds across adults 55 and older.
Almost all of that rests on observational studies, and one confound runs through the whole set. People who are already healthier, better off, and more connected volunteer more to begin with. A study counting helpers against non-helpers then reads part of that head start as though the helping caused it. Declining health also cuts volunteering in the years before death. Before adjustment, volunteers looked about 47% less likely to die; after adjusting for health, about 24%. That 23-point gap is the starting advantage being subtracted out. No trial has ever assigned strangers to volunteer and then counted their deaths.
The firmer evidence comes from a randomized trial. Experience Corps assigns older adults to support children in schools, so who volunteers is set by the trial, not by who already chose to help. Among those assigned, brain volume and daily walking both moved. Brain volume held in the memory regions that shrink with age, clearest in men. Daily walking rose by about 1,500 steps a day in the women. Both are proxies: brain volume for dementia risk, steps for fitness. The Experience Corps trial measured cognition and activity; it did not track how long anyone lived.
The survival signal appears mainly for people who help for other-focused reasons. In one study following older volunteers and their stated reasons, the other-focused group carried a lower mortality risk four years later, even after adjustment. The self-focused group looked much like non-volunteers. Wellbeing itself peaks at a moderate dose and climbs no further.
The survival gap shrinks by half once you adjust for health: because the healthy were always the ones more likely to volunteer.
The Research & Studies
Everything here is based on the research we have collected and checked, sorted into groups and ordered with the strongest evidence first. Click any claim to open the studies behind it.
Longevity And Mortality
Les bénévoles étaient environ 24 % moins susceptibles de décéder au cours du suivi, 47 % avant ajustement pour la santé
Dans des études portant sur des adultes de 55 ans et plus, les personnes qui faisaient du bénévolat étaient environ un quart moins susceptibles de décéder au cours du suivi une fois la santé prise en compte, et près de la moitié moins susceptibles avant ajustement. La baisse de 47 % à 24 % après ajustement pour la santé montre dans quelle mesure le signal brut reflétait des personnes en bonne santé au départ.
Réduction de mortalité non ajustée 47 % (IC à 95 % 38 % à 55 %) ; ajustée 24 % (IC à 95 % 16 % à 31 %). La revue s'est concentrée sur le bénévolat organisationnel chez des personnes de 55 ans et plus et a rapporté des preuves préliminaires que la relation inverse avec la mortalité se renforçait à mesure que la religiosité publique augmentait. Toutes les études incluses sont observationnelles, si bien que le chiffre ajusté constitue un plafond de l'effet, non un effet causal mesuré.
Who this may not transfer to:Both sexes across the pooled studies; the association held across them.
Le signal de mortalité est associé à un bénévolat régulier et soutenu, non à un effort ponctuel, l'unité pratique est donc un rôle permanent exercé sur des années.
The study · 1
Okun, Yeung & Brown, volunteering by older adults and risk of mortality: a meta-analysis · Psychol Aging 2013;28(2):564-577
Mortalité plus faible uniquement pour les bénévoles altruistes, non pour ceux à motivation égocentrée
Dans une étude rigoureuse, les personnes âgées qui faisaient du bénévolat par désir d'aider les autres vivaient plus longtemps que les non-bénévoles, tandis que celles qui faisaient du bénévolat principalement pour occuper leur temps avaient à peu près le même risque de mortalité que les personnes qui ne faisaient pas du tout de bénévolat. C'est un indice que la raison compte, non une règle pour surveiller ses propres motivations.
Régression logistique sur la Wisconsin Longitudinal Study prédisant la mortalité quatre ans plus tard, ajustée pour l'âge, le sexe, le statut socio-économique, la santé physique, mentale et cognitive, les comportements à risque pour la santé, la personnalité, le soutien social reçu et le bénévolat effectif. Les motivations altruistes prédisaient une mortalité plus faible ; les motivations égocentrées non, avec un risque similaire à celui des non-bénévoles. Une seule cohorte observationnelle, et la motivation est enchevêtrée avec la disposition et les circonstances.
Who this may not transfer to:Gender was among the covariates; the split by motive held with it adjusted for.
La lecture pratique est de choisir un travail auquel on croit réellement, car la contribution aux autres est là où se concentre le bénéfice et c'est aussi ce que les gens continuent de faire.
The study · 1
Konrath, Fuhrel-Forbis, Lou & Brown, motives for volunteering are associated with mortality risk in older adults · Health Psychol 2012;31(1):87-96
Behavior Change
Environ 1,500 pas de plus par jour chez les femmes âgées après deux ans, dans un essai randomisé
Because it is a randomized trial, this is some of the firmer evidence here: older women assigned to volunteer in schools were walking about 1,500 more steps a day two years later, while a comparison group of women got less active. Men in the same trial did not change measurably.
Essai contrôlé randomisé stratifié selon le sexe, intégré au Baltimore Experience Corps Trial, 123 participants âgés de 60 ans et plus, pas quotidiens mesurés objectivement. À 24 mois, les femmes du groupe d'intervention affichaient en moyenne 1,500.3 pas de plus par jour que les témoins (IC à 95 % : 77.6 à 2,922.9) ; les femmes du groupe témoin ont diminué de 1,191.6 pas par jour (IC à 95 % : -2,243.7 à -139.5) par rapport au niveau initial. Les hommes n'ont montré aucun changement significatif. Les pas sont un indicateur indirect de la fonction qui compte, et l'effet était spécifique aux femmes.
Who this may not transfer to:Both sexes were randomized; the walking increase reached significance in women, not in men, so this is a women-primary result.
Une raison concrète de privilégier des rôles de bénévolat actifs pour les personnes âgées, avec la précision que le bénéfice sur le mouvement n'est pas automatique pour tout le monde.
The study · 1
Varma et al., effect of community volunteering on physical activity: a randomized controlled trial · Am J Prev Med 2016;50(1):106-110
Mood & stress
Less depression and more life satisfaction in cohort studies, not confirmed in trials
La plus grande revue de cette littérature a constaté que les personnes qui font du bénévolat tendent à rapporter moins de dépression et plus de satisfaction de vie, et que les bénévoles étaient environ un cinquième moins susceptibles de décéder. Le bémol est que les bénéfices sur l'humeur sont apparus dans des études observationnelles, non dans les essais qui les assignaient, de sorte que l'effet sur la dépression est suggéré plus que prouvé.
Forty papers: five RCTs, four non-RCTs, 17 cohort studies. Cohort studies showed favorable effects on depression, life satisfaction and wellbeing but not physical health; a meta-analysis of five cohorts gave a mortality risk ratio of 0.78 (95% CI 0.66 to 0.90). The experimental studies did not confirm the mental-health findings, and the authors noted a shortage of robustly designed trials to guide volunteering as a public-health intervention.
Who this may not transfer to:Pooled across mixed-sex studies; the review did not break the mood findings down by sex.
Treat the mood lift as a likely companion to the connection and purpose volunteering supplies, not as a stand-alone treatment for low mood.
The study · 1
Jenkinson et al., is volunteering a public health intervention? A systematic review and meta-analysis · BMC Public Health 2013;13:773
Better mental wellbeing in regular volunteers, but only from about age 40 onward
Following a large UK sample over time, regular volunteers had better mental wellbeing than people who never volunteered, but only from about age 40 onward. In early adulthood there was no link, which suggests helping matters more for wellbeing at some points in life than others.
British Household Panel Survey, 66,343 person-year observations, mental wellbeing measured with the GHQ-12. Regular volunteers had better wellbeing overall, but age-by-volunteering interactions were significant: the association was absent in early to mid-adulthood, emerged above 40 and continued into old age. Observational, with wellbeing and volunteering plausibly reinforcing each other.
Who this may not transfer to:Population-based UK sample of both sexes across adult ages.
For older adults weighing it, the wellbeing return appears to grow through later adulthood.
The study · 1
Tabassum, Mohan & Smith, association of volunteering with mental well-being: a lifecourse analysis · BMJ Open 2016;6(8):e011327
Les heures supplémentaires au-delà d'un niveau modéré n'ajoutent aucun bien-être, et peuvent même en retirer
Plus n'est pas toujours mieux. Chez les personnes âgées australiennes, le bien-être était le plus élevé chez celles pratiquant un bénévolat modéré, et plus faible tant chez les non-bénévoles que chez celles donnant énormément de temps. Au-delà d'un niveau modéré, les heures supplémentaires n'ajoutaient rien au bien-être et pouvaient même le réduire.
PATH Through Life Project, 2,136 adultes âgés de 64 à 68 ans, ajusté pour l'emploi, le statut conjugal, la santé physique et le niveau d'études. Les heures de bénévolat étaient liées au bien-être selon une courbe en U inversé : les non-bénévoles et les bénévoles à niveau élevé avaient un bien-être plus faible que les bénévoles à niveau modéré. Peu d'associations par domaine spécifique, et aucune interaction notable selon le sexe. Le plan d'étude capture un profil de dose, non une évolution dans le temps.
Who this may not transfer to:Both sexes; no notable gender interactions emerged.
La règle pratique consiste à trouver un niveau modéré et durable plutôt que de maximiser les heures, et à réduire un rôle qui a commencé à vous épuiser.
The study · 1
Windsor, Anstey & Rodgers, volunteering and psychological well-being among young-old adults: how much is too much? · Gerontologist 2008;48(1):59-70
Cognition
More brain volume kept in memory regions over two years, significant in men (0.7% to 1.6%)
In a two-year randomized trial, older adults who volunteered in schools held on to more of their brain volume in the memory regions that usually shrink with age, an effect that was clear in men and smaller in women. It is a promising sign, and brain size is a stand-in for dementia risk, not dementia itself.
Intention-to-treat analysis of 111 randomized participants (58 intervention, 53 control) over two years. Program-specific increases in cortical and hippocampal volume reached significance in men (0.7% to 1.6%), against age-related decline in male controls; women showed gains of 0.3% to 0.54% versus roughly 1% declines in female controls. A biomarker outcome in a modest randomized trial; it did not measure dementia incidence.
Who this may not transfer to:Both sexes were randomized and analyzed; the volume increases reached significance in men, with smaller non-significant gains in women, so the clearest effect here is a men-only result.
Encouraging for the cognition case, best read alongside the pilot on executive function and not as a promise of dementia prevention.
The study · 1
Carlson et al., impact of the Baltimore Experience Corps Trial on cortical and hippocampal volumes · Alzheimers Dement 2015;11(11):1340-1348
Sharper executive control after six months volunteering, in a pilot of 17 older women
In a tiny pilot, older women placed as school volunteers for six months got better at a test of mental self-control, and brain scans showed more activity in the regions that do that work. It is early and small, but it is direct evidence that helping can move the aging brain, not just the mood.
Functional MRI before and after six months of volunteering 15 hours a week in Experience Corps Baltimore, in 8 volunteers versus 9 matched wait-list controls. Participants were at elevated risk for cognitive impairment (mean Mini-Mental State Examination 24). Volunteers showed intervention-specific increases in left prefrontal and anterior cingulate activity and matched behavioural gains in executive inhibitory ability. A pilot of 17, single-sex, six months.
Who this may not transfer to:Measured only in older women; whether the same brain and executive-function gains occur in men was not tested here, though the later brain-volume trial that included both sexes found effects in men as well.
The cognitive angle is a reason for older adults to favor roles with mental and social demand over passive ones.
The study · 1
Carlson et al., evidence for neurocognitive plasticity in at-risk older adults: the Experience Corps program · J Gerontol A Biol Sci Med Sci 2009;64(12):1275-1282
Social Connection
Loneliness after widowhood back to married-peer levels at two or more hours a week
Losing a spouse pushes loneliness up sharply, but in this study older people who started volunteering around two hours a week ended up about as lonely as people who were still married. It is one of the more concrete signs that helping is a route back into connection when life has taken it away.
Pooled sample of 5,882 married adults aged 51 and older across the 2006 to 2014 Health and Retirement Study. Widowhood was associated with significantly higher loneliness than staying married; starting to volunteer 2 or more hours per week moderated this so that widowed volunteers had loneliness similar to continuously married people volunteering at the same intensity. The effect did not appear below 2 hours a week. Observational, with selection into volunteering a live alternative explanation.
Who this may not transfer to:Both widows and widowers were in the pooled sample.
For someone isolated after a loss, this points to a standing role of a couple of hours a week, not occasional help.
The study · 1
Carr, Kail, Matz-Costa & Shavit, does becoming a volunteer attenuate loneliness among recently widowed older adults? · J Gerontol B Psychol Sci Soc Sci 2018;73(3):501-510
Meilleure santé autorapportée et moins de limitations fonctionnelles dans une revue de 73 études
La revue la plus complète sur le bénévolat chez les personnes âgées a constaté que les bénévoles rapportent systématiquement une meilleure santé, moins de limitations physiques au quotidien, moins de dépression et une mortalité plus faible. Les auteurs ont pris soin de préciser que l'essentiel de ces résultats repose sur des études qui observent les personnes plutôt que de les répartir aléatoirement, et que des essais mieux conçus restent nécessaires.
Revue critique de 113 articles identifiés, dont 73 inclus, couvrant des études descriptives, transversales et de cohorte prospectives ainsi qu'un essai contrôlé randomisé. Le bénévolat était le plus systématiquement associé à une réduction des symptômes dépressifs, une meilleure santé autorapportée, moins de limitations fonctionnelles et une mortalité plus faible. Les auteurs ont proposé un modèle dans lequel le bénévolat augmente l'activité sociale, physique et cognitive, réduisant plausiblement le risque de démence, et ont appelé à des mesures plus objectives et des plans contrôlés.
Who this may not transfer to:Synthesis across mixed-sex studies; not broken out by sex.
L'étendue de ce profil est l'essentiel : le bénévolat est lié à plusieurs marqueurs de santé à la fois, ce qui correspond à ce qu'on attendrait d'une habitude agissant par le biais de la connexion, du sens et de l'activité réunis.
The study · 1
Anderson et al., the benefits associated with volunteering among seniors: a critical review · Psychol Bull 2014;140(6):1505-1533
Heart And Vascular
Environ 40 % de nouveaux cas d'hypertension artérielle en moins à partir de 200 heures de bénévolat par an
Dans un échantillon national de personnes âgées, celles ayant consacré au moins 200 heures en une année avaient environ 40 % moins de risque de développer une hypertension artérielle au cours des quatre années suivantes. En dessous de ce seuil, aucun signal n'était observé, et l'étude n'a pas pu déterminer pourquoi la tension artérielle évoluait.
Health and Retirement Study, vagues 2006 et 2010, adultes de plus de 50 ans, excluant les hypertendus au départ, ajusté pour l'âge, l'origine ethnique, le sexe, le niveau d'études, la tension artérielle initiale et les maladies chroniques majeures. Au moins 200 heures de bénévolat l'année précédente prédisaient un risque d'hypertension plus faible (RC 0.60, IC à 95 % : 0.40 à 0.90) ; aucune association à des niveaux plus faibles. Un bénévolat plus important prédisait aussi une hausse du bien-être et de l'activité physique, mais ni l'un ni l'autre ne médiait l'effet sur l'hypertension. Étude observationnelle, avec un seuil élevé d'heures.
Who this may not transfer to:Nationally representative sample of both sexes; sex was a covariate.
Le signal cardiovasculaire se situe à une dose significative, environ quatre heures par semaine, ce qui correspond à l'idée qu'un rôle régulier apporte plus qu'une aide occasionnelle.
The study · 1
Sneed & Cohen, a prospective study of volunteerism and hypertension risk in older adults · Psychol Aging 2013;28(2):578-586
How It Works
The plausible mechanism runs through four things that tend to occur together:
- Connection and belonging. Helping is one of the more dependable ways into regular company.
- Purpose and meaning. Helping gives a reason to get up that is about someone other than yourself, the kind of purpose the strongest research measures.
- Activity, physical and cognitive. A role puts movement and mental demand into a week that might otherwise be still.
- A sense of mattering. Feeling that your presence matters to someone was, in one long study, what linked helping to wellbeing.
Getting It Right
Ways to Do It
Everything here is free, and the effective dose is modest: a couple of hours a week, or a few hours a month, held steadily. Start at whichever rung fits the life you have, match it to something you already care about, and let it repeat.
Start with informal helping close to home: carry something for a neighbor, mind a child, sit with someone who is on their own. It asks little, it puts you in direct contact, and informal helping is where the bigger commitments start. If it suits you, do it again.
Pick a place whose work you would care about anyway: a garden, a library, a shelter, a school, a cause you follow. Interest keeps a commitment alive. A role you look forward to is one you will still be doing in a year, and staying with it is the part that seems to matter for health.
Commit to the same place on the same day, two hours a week, or a handful each month. That is the same repeating structure Experience Corps is built on.
The survival benefit was clearest in people who volunteered to help others, so choose work you believe in. Since the wellbeing gains fade past a point, protect your own limits and keep this something you choose.
Go Deeper
- Connection and belonging: the habit most entangled with helping.
- Purpose and meaning: the neighboring practice, and a large part of what volunteering provides.
- Gratitude: the low-effort practice most about other people, and a natural companion to giving time.
- Depression: where a loss of interest in others is a symptom of depression that needs treatment.
The Chinese Medicine View
The tradition of Yang Sheng, nourishing life, holds that how a person lives shapes their health. It places the cultivation of De among the things that nourish a life. De is usually translated as virtue or moral character. Acting rightly toward others (generosity, kindness, care for the people around you) is counted as a support for health. Classical writers on nurturing life set the cultivation of virtue alongside diet, rest, movement, and the regulation of the emotions.
The tradition also describes this in organ terms. The Heart houses the Shen, the whole of a person's conscious and emotional presence, read in the eyes and in how someone meets another person. A settled Shen shows as a calm, warm, clear mind. Connection given and received is understood to settle the Shen in the Heart, not far from the steadier mood a regular helper tends to show.
The tradition would decline to push someone depleted, grieving, or recovering from illness into service. Epidemiology describes what happens across hundreds of thousands of people, but not the individual in front of you. The tradition describes that individual closely, and has never measured a population.
Cautions For This Practice
Everything to be aware of is here, in one place. This practice suits most healthy people; a few situations call for real care.
Over-committing and burnout
The wellbeing gains flatten and can turn downward when volunteering hours climb too high, so more is not automatically better. If a role starts to feel like a second unpaid job, scale it back to the level you enjoyed, and stop when you are depleted.
Not a substitute for treating depression
A settled low mood alongside poor sleep, loss of appetite or interest, or a sense that nothing is worth the effort is a feature of depression, which responds to treatment. Helping others can sit alongside that care but does not replace it, so talk to a doctor before relying on it on its own.
After illness, loss or exhaustion
If you are recovering from illness, surgery, childbirth, or a recent bereavement, rest and time come first. Add a small role back gently, once you have the energy for it.
If you are thinking about harming yourself
Reach a real person now. Call your local emergency number or the crisis line your health service publishes, and if someone is nearby, tell them and ask them to stay.
Start slow, be smart, read the research, and consult a professional if you have any concerns. This is here to inform your choice, not make it for you.
Common Questions
Is there a bigger dose behind the blood-pressure benefit?
Blood pressure is the one benefit that needed real hours. In one study of older adults, the drop in later high blood pressure only appeared at around 200 hours a year, roughly four hours a week. Nothing showed at lower levels. That is well above the two hours a week behind the other benefits. The 200-hour figure is specific to blood pressure; it is not the bar for everything else.
I am isolated, or newly widowed. Is volunteering a good way to reconnect?
For many people it is one of the better routes, because a shared task removes the pressure to make conversation that keeps people at home. One study followed older adults who had recently lost a spouse. Starting to volunteer about two hours a week brought their loneliness down to levels close to those of still-married people. The effect did not appear at lower intensity. If reconnecting is the aim, see connection and belonging for what predicts regular contact and how to build it.
Explore Related
Other pages this one connects to, by the evidence they share, the outcomes they touch, and the ground they cover.
All 11 sources on this page independently checked and cross-referenced.
Thomas Dehli, Founder & Editor, Sacred Lotus
Sacred Lotus has published Chinese medicine reference material since 2001. Integrative pages are held to the same standard as the herb and formula library: cite the source, grade the claim at its real strength, and say where the research has not looked. This page is educational and it is not medical advice. Last reviewed and updated August 9, 2026.
Evidence strength
How confidently the research supports a claim. Strength describes the evidence, not our endorsement.