Decades of research into the world’s oldest people have turned up a pattern that most of us find both reassuring and uncomfortable at the same time. The National Institute on Aging – which funds some of the most rigorous longevity science in the world, including the New England Centenarian Study and the Georgia Centenarian Study – has consistently pointed to one finding: the habits you repeat every day carry more weight than most people realize when it comes to how long, and how well, you live. Centenarian research habits reveal not just what people who reach 100 do right, but what the rest of us do wrong. And many of the habits that shorten lifespan are not dramatic vices. They are quiet, ordinary routines hiding in plain sight.
Understanding this research requires one key distinction. Scientists separate “lifespan” – the total number of years you live – from “healthspan,” which is the number of years you spend in genuinely good health. Experts like cardiologist and longevity researcher Dr. Eric Topol argue that healthspan is just as important, if not more so, than simply living as many years as possible. The goal, in other words, is not just more years – it is more good years. That framing matters because several of the habits below chip away at both measures simultaneously.
One more thing worth knowing before diving in: genes are not destiny here. Experts estimate that about 25% of the variation in human lifespan is determined by genetics, and the rest can be attributed in large part to how we take care of our bodies. Research from the New England Centenarian Study suggests that the average genome, combined with optimal health behaviors, facilitates an average lifespan of the late eighties, and that the vast majority of why one lives to their sixties or seventies versus those later years would be explained by health habit choices. What follows are 10 daily habits linked to shorter lifespans – drawn from that body of research.
1. Sitting for Most of the Day
Daily movement is one of the most important habits to protect physical and mental health as we age, according to Emily Johnston, Ph.D., a research professor at NYU Langone specializing in healthy aging. As we get older, we tend to spend more time sitting around. The problem is that sedentary behavior – meaning long, unbroken hours in a chair – has its own health consequences, separate from whether or not you exercise at other times of day. You can go to the gym in the morning and still cause measurable harm if you spend the next eight hours motionless at a desk.
A sedentary lifestyle has long been associated with health issues ranging from back pain and obesity to inflammation, and it can increase the risk of heart disease, hypertension, high cholesterol, cancer, and premature death. This is one of the daily habits linked to early death that gets the least attention, partly because sitting feels neutral. It does not feel like doing something harmful, but the research says otherwise.
The fix does not require a gym membership. Standing up once every hour, walking during phone calls, or taking short breaks throughout the day are all enough to interrupt the biological chain reaction that prolonged stillness triggers. Movement is not just good for longevity; for people who sit most of the day, it is protective in a very direct, measurable way.
2. Eating Ultra-Processed Foods Daily
If you want to extend your healthspan, eating less ultra-processed food is a great start, according to Dr. Johnston. Ultra-processed foods are those that have been heavily modified from their original form, often loaded with refined carbohydrates, added sugars, artificial preservatives, and high amounts of sodium. Think packaged snacks, fast food, processed meats, and ready-made meals engineered for shelf life rather than nutrition.
These foods have been significantly modified using industrial ingredients and often contain high amounts of sodium, saturated fats, and preservatives. Eating them regularly is linked with an increased risk of diabetes and heart disease. The World Health Organization considers processed meats a group 1 carcinogen, meaning there is sufficient evidence that they can cause cancer, specifically colorectal cancer.
Centenarian research habits from communities like Okinawa in Japan and the Greek island of Ikaria show a strikingly different pattern. The diets of centenarians and near-centenarians typically included staple foods such as rice and wheat, fruits, vegetables, and protein-rich foods like poultry, fish, and legumes, with moderate red meat consumption – a dietary pattern similar to the Mediterranean diet, linked to lower risks of physical function impairment and death. The contrast with ultra-processed eating could hardly be more stark.
3. Chronic Poor Sleep
Sleep is where your body runs its most important maintenance program. Your brain clears metabolic waste, your cells repair DNA damage, and your hormones recalibrate – all while you are unconscious. Consistently cutting that process short, or disrupting it with irregular sleep schedules, has real downstream consequences.
Research reports that longevity is likely linked to regular sleeping patterns, such as going to bed and waking up around the same time each day. Sleep duration also seems to be a factor, with both too little and too much being harmful. Too little sleep may promote inflammation and increase your risk of diabetes, heart disease, and obesity – all of which are linked to a shortened lifespan.
This is one of the lifespan research findings that surprises people because the harm from poor sleep builds slowly. There is no immediate pain signal. You feel tired, maybe irritable, but you function. Over years and decades, though, the cumulative burden of poor sleep accelerates biological aging in ways that show up in the body long before they show up on a doctor’s chart. The National Institute on Aging’s guidance on healthy aging consistently flags sleep as a core pillar of longevity, not an optional extra.
4. Smoking – at Any Level
This one is well established, but it still deserves a place on this list because the magnitude of harm continues to surprise people – and because many smokers believe that cutting back is good enough. The research does not support that belief.
One study of nearly 200,000 people demonstrated that older adults who quit smoking between the ages of 45 and 54 lived about six years longer compared to those who continued to smoke, while adults who quit between the ages of 55 to 64 lived about four years longer. Quitting works. But continuing – even at low levels – carries a documented cost that compounds over time.
Smoking does not just affect the lungs. It poisons blood vessels, accelerates heart disease, and damages DNA. The habit disrupts nearly every system in the body, from cardiovascular function to immune response to cellular repair. Centenarian research habits consistently show that people who reach 100 rarely smoked or quit decades earlier. Among the daily habits linked to early death, this one carries the heaviest individual burden.
5. Drinking Alcohol Heavily or Regularly
The conversation around alcohol and health has shifted significantly in recent years. Earlier research suggested moderate drinking offered cardiovascular benefits. Newer, larger studies have complicated that picture considerably.
According to the National Institute on Aging, older adults should avoid or limit alcohol consumption. Aging can lead to social and physical changes that make older adults more susceptible to alcohol misuse and abuse and more vulnerable to its consequences. Alcohol dependence or heavy drinking affects every organ in the body, including the brain.
A 2020 study published in the journal Proceedings of the National Academy of Sciences examined a wide variety of risk factors related to life expectancy and identified 57 social and behavioral elements that contribute to early mortality in the U.S. Researchers ultimately pinpointed alcohol abuse as one of six factors with the most impact on early death. The longevity lifestyle habits associated with centenarian populations are notably low in heavy alcohol consumption. In a so-called “longevity island” in China, most centenarians’ lifestyles were found to be similar, with most participants not smoking or drinking alcohol.
If you currently drink regularly, this is worth an honest conversation with your doctor – not to eliminate all enjoyment, but to understand what the evidence actually says about your specific level of consumption.
6. Ignoring Chronic Stress
Stress is not just a mental state. It is a full-body biological event, and when it becomes chronic – meaning it persists day after day with no relief – it drives a cascade of physical harm that accumulates over years.
A study published through the National Institute on Aging examined how levels of the stress hormone cortisol change over time. Researchers found that cortisol levels in the body increase steadily after middle age, and that this age-related increase in stress may drive changes in the brain. A meta-analysis funded by the National Institute of Mental Health supports the notion that stress and anxiety rewire the brain in ways that can impact memory, decision-making, and mood.
The NIA’s Baltimore Longitudinal Study of Aging adds a striking data point here. In an analysis of data from that study, scientists followed 2,000 participants for more than five decades, monitoring mood and health. The data reveal that individuals who were emotionally stable lived on average three years longer than those who had a tendency toward being in a negative or anxious emotional state.
Three years is not a trivial difference. Stress management – through exercise, sleep, therapy, meditation, or simply building in regular downtime – is not soft wellness advice. It is a longevity intervention with measurable results.
7. Living in Social Isolation
If you look at what daily habits do centenarians avoid for longer life, social isolation sits near the top of the list alongside smoking and physical inactivity. The research on this point has become remarkably consistent over the past decade.
Spending too much time alone can increase the risk of social isolation and loneliness, which are associated with depression, cognitive decline, heart disease, and early death, according to the National Institutes of Health. Research published in the journal Brain, Behavior, and Immunity and co-authored by researchers at Harvard T.H. Chan School of Public Health found that adults with higher cumulative social advantage – meaning long-standing, robust relationships with family, friends, and community groups – had biological markers showing slower cellular aging and reduced levels of chronic inflammation compared to their less-connected peers.
The numbers are striking. Researchers estimate that having strong and secure relationships not only increases happiness but also longevity by roughly 50 percent. That is a larger effect than most medications. Loneliness has been associated with a 50% increased risk of dementia, a 29% increased risk of heart disease, and a 32% increased risk of stroke, according to the National Institute on Aging. For anyone wondering what the National Institute on Aging says about lifespan, isolation is one of the clearest risk factors they identify.
8. Skipping Preventive Healthcare
Many people feel fine and therefore conclude they are fine. This is one of the most common – and costly – errors in long-term health management. A large number of the conditions most likely to shorten life develop without obvious symptoms until they are significantly advanced.
Routine annual physicals and screenings are crucial, yet millions of Americans do not take advantage of preventive care services, research shows. High blood pressure, elevated blood sugar, high cholesterol, and early-stage cancers can all be caught and managed effectively when detected early. Left undetected, they become the very diseases most likely to cut life short.
This habit also links directly to what the National Institute on Aging says about lifespan. Checking in with doctors annually, and possibly more often depending on overall health, may help reduce risk factors for disease such as high blood pressure and cholesterol levels. Regular check-ups can also help catch concerns early and improve the chances for effective treatment. People who routinely skip these appointments may feel they are saving time. What the research suggests is that they may be trading years.
If you’ve been putting off a physical, a blood panel, or an age-appropriate screening, those habits that speed up aging after 40 are worth reviewing alongside your healthcare provider – because the window for the most effective intervention is often earlier than people expect.
9. A Persistently Negative Emotional Outlook
This may be the most underappreciated entry on this list, and it is worth being precise about what the science actually says. This is not about forcing positivity or pretending life is better than it is. It is about the documented biological cost of chronic negativity, hostility, and pessimism.
Emotions such as anger, contempt, disgust, guilt, and fear – collectively referred to as negative affect – can rob years from a lifespan, as can a poor self-image and dissatisfaction with life. Persistent feelings of anxiousness, tension, and moodiness also carry a measurable cost.
Research from the National Institute on Aging on optimism and longevity adds important context. Results from two major studies provide insights into how optimism may improve health and longevity. Findings from the first study show that optimism is linked to a longer lifespan across racial and ethnic groups. Crucially, the second study suggests that optimism may benefit health partly because it is linked to reduced exposure to stress. Because optimism is a modifiable characteristic that can be changed with interventions like writing exercises and therapy, improving optimism may be an effective strategy to improve health and extend lifespan.
The takeaway here is not to become someone you are not. It is that emotional patterns are not fixed, and the research shows that shifting them – even modestly – produces real changes in health outcomes over time.
10. Eating a High-Sodium, Low-Nutrient Diet
Beyond the ultra-processed food question addressed earlier, there is a more specific dietary pattern worth examining: a chronic reliance on high-sodium, low-nutrient food that crowds out the plant-based whole foods associated with longer lives. This is particularly relevant as people enter their 40s and 50s, when metabolic rate slows, and the body becomes more sensitive to the cumulative effects of dietary choices.
According to Harvard Health, an excellent diet for promoting longevity is a plant-based diet. A study published in JAMA Network Open found that women who most closely adhered to the plant-based Mediterranean diet – which emphasizes vegetables, fruits, nuts, whole grains, legumes, and fish, while minimizing red and processed meat – were 23% less likely to die from any cause than women who did not closely follow this dietary pattern.
Centenarian research from around the world lands on a similar conclusion. A 2025 study published in Nature and cited by Dr. Eric Topol, cardiologist and longevity researcher at the Scripps Research Institute, followed 105,000 people for 30 years and found that 9% made it to age 70 without age-related diseases. The people in that 9% ate basically a Mediterranean-style diet low in red meat and high in fruits, vegetables, legumes, and whole grains.
High salt intake is a specific concern within this broader pattern. Most centenarians also preferred a low-salt diet. Chronically high sodium intake is directly linked to elevated blood pressure – itself one of the leading contributors to cardiovascular disease and stroke, two of the most common causes of premature death in the developed world.
What Centenarian Research Actually Tells Us
It is worth stepping back and looking at what all of this evidence adds up to. These are not random findings scattered across different studies. They form a coherent picture of how daily routines either speed up or slow down biological aging. These habits speed up biological aging because they directly damage DNA, increase inflammation, and overload cells with stress, causing the body and organs to work harder and age more quickly.
Researchers have found strong evidence for an additional role of both diet and lifestyle changes as agents for longer life and reaching centenarian status. But it is also important to be honest about what centenarian research cannot fully resolve. Studies of people who reach 100 are largely observational – they show associations between habits and longevity, not always direct cause and effect. Genetics plays a genuine role, particularly at the extremes of longevity. The New England Centenarian Study, which oversees four studies of exceptional longevity funded by the National Institute on Aging, has found that genetic influence upon survival increases with older and older ages of survival.
That said, for the majority of people hoping to live well into their 80s and beyond, the evidence strongly supports the idea that daily choices matter enormously. For super agers, genes make up about 80% of the reason for their extraordinary longevity – but for people hoping to live well into their 80s or early 90s, they have more control. “That’s where lifestyle plays an important role,” says Dr. Sofiya Milman, director of Human Longevity Studies at Einstein’s Institute for Aging Research.
None of the 10 daily habits linked to shorter lifespans identified here requires a dramatic life overhaul to address. Each one can be shifted incrementally. Sitting less does not mean running marathons. Eating fewer processed foods does not mean never eating them. Connecting with others more regularly does not require a packed social calendar. Centenarian research habits point consistently toward moderation, consistency, and the slow accumulation of better choices – not perfection.
What the research does make clear is that when it comes to National Institute on Aging longevity findings, the most powerful interventions are not drugs or supplements. They are the behaviors you repeat, quietly, every single day.
Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.