In the rugged mountain villages of central-eastern Sardinia, growing old is almost a way of life. What has fascinated scientists for decades, however, is not simply the number of people reaching 100, but the fact that men do so almost as often as women. In most developed countries, women vastly outnumber men among centenarians, yet Sardinia’s mountainous interior defies that pattern. The discovery transformed the island into one of the world’s original “Blue Zones” and inspired years of scientific research. Although many people credit the phenomenon to healthy eating or having a strong sense of purpose, researchers say the real explanation lies in a much broader combination of biology, lifestyle, environment and culture.
Why men in remote Italy reach 100 almost as often as women
The villages scattered across the mountains of Nuoro and Ogliastra in central-eastern Sardinia have one of the world’s most unusual longevity patterns. While women generally live longer than men almost everywhere else, the gap nearly disappears in this part of Italy.The phenomenon was first documented in the AKEA Study, published in Experimental Gerontology in 2004 by physician Gianni Pes, Belgian demographer Michel Poulain and colleagues. After examining records from all 377 municipalities across Sardinia, researchers found that exceptional longevity clustered in the mountainous interior rather than being evenly distributed across the island.Inside this cluster, approximately 91 people born between 1880 and 1900 reached the age of 100, around three times more than expected based on the Sardinian average. It was this remarkable concentration of centenarians that prompted researchers to mark the region in blue ink on a map, giving rise to the now-famous term “Blue Zone.”
The numbers that made Sardinia famous
Sardinia’s reputation is built on more than anecdotal stories.Across much of Europe and North America, women outnumber male centenarians by roughly five to one. In Sardinia’s Blue Zone, however, men and women reach 100 at nearly the same rate, making it one of the few documented regions where male longevity closely matches female longevity.Researchers also found that Sardinia as a whole had around 16.6 centenarians per 100,000 people, compared with approximately 10 per 100,000 across Europe at the time of the study. While those figures have changed over time, they highlighted just how unusual the island’s demographics were.Importantly, this does not mean Sardinian men are five times more likely to reach 100 than men elsewhere. Rather, it means the usual gender gap among centenarians is dramatically smaller.
Is the secret really purpose instead of diet?
One of the most widely shared explanations is that older Sardinians never “retire into irrelevance.” Many continue farming, tending sheep, helping raise grandchildren, repairing homes or participating in village life well into their 80s and 90s. Their social role rarely disappears with age.The idea became globally popular through journalist Dan Buettner, whose Blue Zones books and documentaries highlighted communities where people remain physically active and socially connected throughout life.However, the original Sardinian researchers were far more cautious. Their studies did not conclude that purpose alone explained exceptional longevity. Instead, they argued that no single factor could account for the pattern.
Lifelong physical activity appears to be one of the biggest factors
Many of Sardinia’s oldest men spent decades working as shepherds, often walking several kilometres each day across steep mountain terrain.Unlike modern exercise routines, this activity was continuous and built into everyday life. Researchers believe decades of moderate physical exertion helped maintain cardiovascular health, muscle strength and metabolic fitness well into old age.A 2022 study published in Frontiers in Aging again pointed to occupational activity and physically demanding lifestyles as major contributors, particularly among men living in Sardinia’s mountainous interior.Scientists say this may explain why the island’s male longevity differs so markedly from that seen elsewhere.
Genetics and geography also matter
Lifestyle alone does not appear to explain Sardinia’s remarkable longevity.The mountainous communities remained relatively isolated for centuries, allowing certain genetic traits to become more common within local populations. Researchers believe these inherited characteristics may influence how people age and how resistant they are to age-related diseases.The island’s geography may also have played a role. Until recent decades, many villages were difficult to access, preserving traditional lifestyles, diets and social structures that changed much more slowly than in urban areas.Scientists therefore see Sardinia’s longevity as the result of genetics interacting with environment rather than one overriding cause.
The traditional Sardinian lifestyle
Researchers have also examined everyday habits common among the island’s oldest residents.Traditional diets typically include whole grains, beans, seasonal vegetables, olive oil, goat and sheep’s milk products and moderate amounts of locally produced red wine. Meals are often shared with family, reinforcing strong social connections that many psychologists believe support mental wellbeing.Equally important is the culture of close-knit communities. Older adults continue participating in family decisions, community celebrations and religious traditions, remaining socially integrated rather than isolated after retirement.Scientists increasingly believe this combination of healthy eating, regular movement and strong social bonds works together rather than independently.
Does having a purpose really help people live longer?
Scientific research suggests it may, but the evidence is more nuanced than many headlines imply.A 2009 study led by researcher Patricia Boyle found that older adults with a stronger sense of purpose were less likely to die during the study period and showed lower risks of cognitive decline.Another study, published in JAMA Network Open in 2019 and involving nearly 7,000 Americans over the age of 50, also reported that people with greater purpose in life tended to live longer.However, these studies demonstrate an association, not proof of cause and effect. Researchers cannot say whether purpose itself extends life or whether healthier people naturally remain more engaged with life.Interestingly, another study by psychologists Patrick Hill and Nicholas Turiano found that the relationship between purpose and longevity remained strong even after retirement, suggesting that retirement itself is not harmful if people continue to find meaning in daily life.
Not everyone agrees with the Blue Zone story
Although Sardinia remains one of the world’s best-known longevity hotspots, some scientists have questioned the reliability of extreme-age records.Demographer Saul Justin Newman argues that missing birth certificates, incomplete death registrations and historical record-keeping errors may have exaggerated the number of verified centenarians in several Blue Zones around the world. He believes some exceptional age records require closer scrutiny.Many longevity researchers disagree with his broader conclusions but acknowledge that verifying extreme ages is essential. As a result, scientists continue reviewing historical records while conducting new research using modern demographic methods.
The search for the secret continues
After more than two decades of research, scientists have reached one important conclusion: there is no single “secret” behind Sardinia’s remarkable longevity.Instead, exceptional longevity appears to emerge from the interaction of several factors, including genetics, lifelong physical activity, traditional diets, strong family relationships, active participation in community life and the island’s unique geography.For researchers studying healthy ageing, Sardinia remains one of the world’s most valuable natural laboratories. Its mountain villages continue to offer important clues about how biology, lifestyle and social connection may work together to help people live not only longer lives, but healthier ones too.