Your dog might be adding years to your life — here's what the research actually says
Doges Editorial · 2026-05-15 · 6 min read
A 2019 study of nearly four million people found dog owners had a 24 percent lower risk of death. The science since then has gotten more complicated — and more interesting.
Binx, a five-year-old cocker spaniel in North Carolina, wakes his owner Steven Petrow at roughly the time Petrow would prefer to sleep another hour. He attacks pillows when his walk is late. He has shredded a morning newspaper in under three minutes flat. He also, according to a growing stack of research, may be adding years to Petrow's life.
That's the question at the center of a piece published this week in The Washington Post's Smarter Aging column: can living with a dog actually help you live longer? The answer, it turns out, is probably — with a few important caveats the science hasn't fully resolved.
The number that started the conversation
In 2019, a meta-analysis of nearly four million people published in the journal Circulation: Population Health and Outcomes found that having a dog was linked to a 24 percent lower risk of death from any cause during the study period, compared with people who lived without dogs. The benefit was especially pronounced for people who had previously experienced heart attacks or other cardiovascular events.
It's a striking number. It's also one that researchers are careful about. Studies like this can show association, not causation. People who keep dogs may be wealthier, more mobile, or more socially connected to begin with — factors that independently predict longer lives. The dog might be a marker for health rather than a cause of it.
The walk you can't skip
If you do reach those exercise guidelines, you will have lower blood pressure, you can lower your cholesterol, and you can lower your triglycerides.
— Beth Frates, associate professor at Harvard Medical School
The most obvious explanation for the longevity link is the walk. Research consistently shows that dog owners are more likely to reach the recommended 150 minutes of moderate physical activity per week — roughly 20 minutes a day — because their dogs simply won't let them skip it. Binx insists on at least one walk that long, twice a day. Petrow reports hitting 10,000 steps without especially trying.
But the dog walk has its own complications. Adrian Bauman, an emeritus professor of public health at the University of Sydney and lead author of a 2020 commentary on the research, notes that much of dog walking is, in his words, "light activity because the dogs stop at every tree." His recommendation: walk twice a day, and make at least some of it continuous. And remember — the cardiovascular benefit accrues only to the person who actually takes the leash.
Alone, with a dog
The evidence is most compelling for people who live alone. A 2019 study of more than 300,000 heart attack and stroke survivors in Sweden found that those who lived alone and owned a dog had a meaningfully lower risk of death compared to those who lived alone without one. For survivors living with a partner or child, the reduction existed but was smaller. Living alone with a dog appears to close some of the health gap that social isolation otherwise creates.
Bauman is characteristically careful: "dog ownership is not yet evidence-based as being protective." But he also told Petrow that dogs are likely a health benefit "even if owned and not walked" — and that newer research increasingly recognizes benefits well beyond the cardiovascular. "There are other benefits increasingly recognized to owning a dog," he said, "including social support and companionship especially for older and isolated folk and possible reducing or slowing cognitive decline."
A dog is an open invitation
When people walk their dogs, they often engage with other people. A dog is an open invitation for conversation.
— Beth Frates, Harvard Medical School
The walk isn't just exercise. It's a social event. Dog owners stop at corners. They talk to neighbors, to other dog owners, to strangers who can't resist pausing for a pat. A poll by the Institute for Healthcare Policy & Innovation at the University of Michigan found that 70 percent of pet owners over 50 agreed that having a pet connects them with others. Loneliness and social isolation, a 2025 meta-analysis found, are genuine risk factors for mortality — particularly in older adults.
Petrow himself, who got Binx not long after a divorce, found an unexpected benefit in the structure the dog created. Every morning, regardless of how the rest of life felt, Binx needed feeding and walking. The day had a beginning. That rhythm — the leash by the door, the same sidewalk at the same hour — turns out to matter.
A reason to get up
There is a Japanese concept called ikigai — roughly, reason for being, or reason for waking up. Frates, who owns a five-year-old German Shepherd, says dogs give their owners exactly that. A dog needs feeding at seven. It needs a walk. It cannot wait until you feel like it. That structure, it turns out, is not just convenient — it may be part of the health benefit itself.
The Michigan poll found that more than eight in ten pet owners over 50 said their dogs gave them a sense of purpose. Seven in ten reported greater joy in life because of them. Sixty-three percent said dogs help reduce their stress. A 2022 survey of 1,693 people found that dog owners described the relationship as providing purpose, companionship, self-acceptance, pleasure, and distraction — as well as lessening emotional pain and reducing risk behaviors.
What the science can't settle
The research on dogs and longevity is real but incomplete. The evidence on walking and heart health is strong. The case for social connection is strong. The causal link between owning a dog and living longer remains suggestive, not proven — and the researchers are the first to say so. More longitudinal studies, particularly ones that track people before and after they get a dog, are needed before anyone can say anything definitive.
But here's what the researchers do agree on: if you already have a dog, you probably have some modest edge. In steps taken. In conversations had at the corner. In mornings that started when someone who loves you absolutely insisted. Whether that adds up to years, or simply to better ones, may be a distinction that doesn't matter very much.
Think about your own morning walk — the wet grass, the familiar routes, the corners your dog insists on investigating even though nothing has changed since Tuesday. That's not nothing. That's 20 minutes of moderate exercise, a conversation with the neighbor, and a reason to close the laptop and go outside. Accumulated over years, that's a different kind of life.