The 75-year-old Sardinian shepherd Tonino Tola, profiled by National Geographic during Dan Buettner’s original Blue Zones research in the early 2000s, walked at least five miles every day along the rugged mountain trails of his island’s interior. He did not walk for exercise. He walked because his sheep needed tending, his garden needed weeding, his neighbour needed help carrying something heavy, and the nearest village shop sat at the bottom of a steep hill.
The mountains of central Sardinia, where men reach the age of 100 at rates several times the global average, are not gentle terrain. They demand constant low-grade physical effort from anyone who lives in them. The Sardinian shepherds have done this every day of their working lives, without gym memberships, without fitness trackers, without designated workout times. Tola, when asked by an American journalist whether he exercised, looked confused. The Italian word for “exercise” — esercizio — was not, in his usage, a category that described what shepherds did.
According to the original National Geographic feature on the Blue Zones, this pattern was one of the more consistent findings across the five regions Buettner and his National Institute on Aging collaborators identified as having unusual concentrations of centenarians: Sardinia in Italy, Okinawa in Japan, Ikaria in Greece, the Nicoya Peninsula in Costa Rica, and the Seventh-day Adventist community of Loma Linda in southern California. None of these populations included significant numbers of people who jogged, lifted weights, or attended fitness classes. What they all had in common was an environment in which the absence of motorised convenience meant that physical activity was distributed across the entire day, in small frequent doses, integrated with the ordinary tasks of food production, household maintenance, and community life.
What a 2025 study found
According to a Harvard Health review of Blue Zone research published in September 2025, a study in the March 2025 issue of the Journal of Population Ageing systematically examined the physical activity patterns of Blue Zone centenarians in comparison with the standard Western public-health recommendation of 150 minutes per week of moderate-intensity exercise. The researchers found that the centenarians did not follow Western exercise routines. They did not perform balanced programmes of strength training and aerobic conditioning. They did not meet, or even approach, the 150-minutes-per-week threshold in any structured way. What they did instead, as the Harvard summary put it, was incorporate activity into their daily lives such that they were “constantly on the move.” The activity was distributed throughout the day, low in intensity, high in frequency, and never identified by the participants themselves as “exercise.”
The specific activities varied by region but rhymed in structure. According to Mayo Clinic Press’s review of Blue Zone lifestyle patterns, Sardinian shepherds walk five or more miles per day across mountain terrain; Okinawan elderly tend gardens daily, growing the produce they eat and sit on tatami mats that require them to get up and down dozens of times per day, training balance and lower-body strength as a side effect; Nicoyans sweep their homes by hand, walk to local destinations, tend cattle, and wash clothes manually; Ikarian residents climb hills as a routine matter of getting to their own front doors; Loma Linda Adventists do extensive gardening as part of their religious tradition of food sovereignty. None of these patterns map cleanly onto any conventional exercise prescription. All of them involve low-intensity movement distributed across enough of the day that the cumulative physiological load substantially exceeds what most sedentary Western adults achieve through deliberate exercise sessions.
Why this might work
The physiological case for distributed low-intensity movement, as opposed to concentrated high-intensity exercise, has been building in the cardiovascular and metabolic research literature for two decades. Sitting for long uninterrupted periods produces measurable negative effects on insulin sensitivity, blood pressure, lipid profiles, and inflammatory markers, even in people who exercise vigorously for an hour each day. The 23 hours per day of sitting cannot, in this sense, be fully offset by one hour of structured exercise. Distributed movement — getting up every 30 minutes, walking after meals, gardening in the afternoon, walking to local shops — appears to address the metabolic costs of sedentary living more effectively than concentrated workouts do, even when total daily activity volume is similar.
Gardening, in particular, has been studied as a discrete longevity-associated activity. The act of weeding, planting, harvesting, and watering involves bending, squatting, lifting, twisting, and walking — a combination of movements that more closely resembles a physical-therapy programme for elderly mobility than any conventional workout. The cognitive engagement involved in planning and managing a garden adds an additional component. The seasonal nature of gardening provides what Buettner has called a “nudge” — once seeds are planted, the gardener is committed to several months of follow-up activity to bring the plants to harvest. Multiple Blue Zone populations have gardening as a near-universal activity among the elderly. The Mayo Clinic Press review notes that nearly all Okinawan centenarians maintain gardens, and that Loma Linda Adventists are known for their elaborate vegetable plots and orchards.
The methodological caveat
The Blue Zones concept as a whole has been substantially challenged in recent years, and intellectual honesty requires acknowledging the critique even when the underlying activity findings hold up well. According to a press release from University College London on the 2024 Ig Nobel Prize in Demography, the Oxford and UCL demographer Saul Justin Newman was awarded the prize for research arguing that the alleged supercentenarian populations of the Blue Zones are largely artifacts of poor birth registration, clerical errors, and pension fraud. Newman demonstrated that the highest rates of achieving extreme old age are predicted by high poverty, the lack of birth certificates, and fewer 90-year-olds in the same population — patterns more consistent with administrative errors and fraudulent age claims than with genuine biological longevity. Italy, in 1997, discovered approximately 30,000 citizens who were drawing pensions while dead. Japan, in 2010, found that approximately 230,000 of its supposedly living centenarians were missing, imaginary, dead, or the result of clerical errors. Costa Rica, in 2008, found that 42 percent of people aged 99 or older had misstated their ages in the 2000 census.
Newman’s critique does not prove that the Blue Zone populations are not longer-lived than average — it argues that the magnitude of the longevity advantage has been substantially overstated, and that the most reliable predictor of “supercentenarian status” in a given region is the absence of reliable birth records rather than the presence of healthy lifestyle factors. The implications for the broader Blue Zones research programme are still being debated. What Newman’s work does not undermine is the underlying observation that low-intensity distributed movement is associated with better cardiovascular and metabolic outcomes than concentrated high-intensity exercise — that finding is supported by independent research on populations that are not part of the contested Blue Zones literature, and it remains robust regardless of how many actual supercentenarians live in Sardinia.
What it means for the rest of us
The practical implication of the natural-movement finding, for people who do not happen to live in mountainous Mediterranean villages, is that the conventional Western public-health prescription of structured exercise may be addressing only part of the problem. A person who sits at a desk for eight hours, drives to and from work, and then attends a 45-minute spin class in the evening is, by any honest accounting, a sedentary person who exercises briefly. A person who walks to work, climbs stairs throughout the day, gardens on the weekends, and walks to local shops in the evenings is a non-sedentary person who never specifically “exercises.” The two patterns produce, on average, substantially different metabolic and cardiovascular outcomes, with the second pattern outperforming the first even when total minutes of moderate-intensity activity are similar.
The challenge for modern urban life is that most environments are designed to make the second pattern difficult and the first pattern necessary. Cars, elevators, motorised lawn equipment, online grocery delivery, and the geographic separation of work from residence have collectively eliminated most of the incidental movement that previous generations performed automatically. Recovering the equivalent activity through deliberate behavioural change is possible but requires sustained effort against the grain of the built environment. The most effective anti-aging routine identified by researchers may, as the title’s framing suggests, be one that doesn’t feel like a routine at all — but reconstructing that pattern from inside a 21st-century city is harder than it looks, and the success of doing so probably depends more on the layout of the streets, shops, and stairs that surround a person than on the willpower of the person themselves.
