In the rugged mountain villages of central-eastern Sardinia, growing old is almost a way of life. However, what has been fascinating scientists for decades is not just the number of people reaching 100, but the fact that men do so almost as often as women. In most developed countries, women far outnumber men among centenarians, yet Sardinia’s mountainous interior defies that pattern. The discovery turned the island into one of the world’s original “Blue Zones” and inspired years of scientific research. Although many attribute this phenomenon to healthy eating or a strong sense of purpose, researchers say the real explanation lies in a broader combination of biology, lifestyle, environment, and culture.
Why do men in remote Italy reach 100 at almost the same time 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, the gap almost disappears in this part of Italy.This phenomenon was first documented in the AKEA study, published in Experimental Gerontology in 2004 by physician Gianni Pace, Belgian demographer Michel Poulain, and colleagues. After examining records from all 377 municipalities in Sardinia, researchers found that exceptional longevity is clustered in the mountainous interior rather than being distributed evenly throughout the island.Within this group, about 91 people born between 1880 and 1900 reached the age of 100, which is about three times higher than expected based on the Sardinian average. It was this remarkable concentration of centenarians that inspired researchers to mark the area in blue ink on maps, 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.In much of Europe and North America, women outnumber men as centenarians by approximately five to one. However, in the Blue Zones of Sardinia, men and women reach 100 at approximately the same rate, making it one of the few documented regions where male longevity closely matches female longevity.The researchers also found that there were about 16.6 centenarians per 100,000 people in all of Sardinia, compared to about 10 per 100,000 in all of Europe at the time of the study. Although those figures have changed over time, they highlight how unusual the island’s demographics were.Importantly, this does not mean that Sardinian men are five times more likely to reach 100 than men in other places. Rather, it means that the general gender gap among centenarians is dramatically smaller.
Is purpose rather than diet really the secret?
One of the most widely shared explanations is that the older Sardinians never “retired into irrelevance.” Many people continue into their 80s and 90s to farm, herd sheep, help raise grandchildren, repair homes, or participate in village life. Their social role rarely diminishes with age.The idea became popular globally through journalist Dan Buettner, whose Blue Zones books and documentaries highlighted communities where people remain physically active and socially connected throughout their lives.However, the original Sardinian researchers were far more cautious. Their study did not conclude that purpose alone explains extraordinary longevity. Instead, he 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 people worked as shepherds for decades, often walking several kilometers each day over steep mountainous terrain.Unlike modern exercise routines, this activity was continuous and incorporated into everyday life. Researchers believe that decades of moderate physical exertion helped maintain cardiovascular health, muscle strength and metabolic fitness into old age.A 2022 study published in Frontiers in Aging again pointed to occupational activity and a physically demanding lifestyle as major contributors, especially among men living in the mountainous areas of Sardinia.Scientists say this may explain why the longevity of the island’s males is so markedly different from that seen elsewhere.
Genetics and geography matter too
Lifestyle alone does not explain Sardinia’s remarkable longevity.Mountain communities remained relatively isolated for centuries, allowing certain genetic traits to become more common in local populations. Researchers believe that these inherited characteristics may affect how people age and how resistant they are to age-related diseases.The geography of the island 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 urban areas.Scientists therefore view Sardinia’s longevity as a result of the interaction of genetics with environment rather than any major cause.
Traditional Sardinian lifestyle
The researchers also examined common everyday habits among the island’s oldest inhabitants.The traditional diet typically includes whole grains, beans, seasonal vegetables, olive oil, goat and sheep milk products, and moderate amounts of locally produced red wine. Meals are often shared with family, fostering stronger social bonds, which many psychologists believe helps mental health.The culture of close-knit communities is equally important. Older adults continue to participate in family decisions, community gatherings, and religious traditions, remaining socially integrated rather than isolated after retirement.Scientists believe that this combination of healthy eating, regular activity, and strong social bonds works together rather than independently.
Does having a purpose really help people live longer?
Scientific research suggests this may be the case, but the evidence is more nuanced than many headlines suggest.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 had a lower risk 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 a greater purpose in life live longer.However, these studies demonstrate an association, not proof of cause and effect. Researchers can’t say whether purpose itself extends life or whether healthy people are naturally more engaged with life.Interestingly, another study by psychologists Patrick Hill and Nicholas Turiano found that the relationship between purpose and longevity remains strong after retirement, suggesting that retirement itself is not harmful if people continue to find meaning in daily life.
Not everyone agrees with the Blue Zones story
Although Sardinia remains one of the world’s most famous 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 have overstated the number of verified centenarians in many Blue Zones around the world. He believes that some extraordinary age records require closer examination.Many longevity researchers disagree with their broad conclusions but acknowledge that it is necessary to confirm extreme ages. As a result, scientists continue to review historical records while conducting new research using modern demographic methods.
The search for Raj continues
After more than two decades of research, scientists have come to an important conclusion: There is no single “secret” behind Sardinia’s remarkable longevity.Instead, extraordinary longevity appears to emerge from the interplay of a number of factors, including genetics, lifelong physical activity, traditional diet, strong family relationships, active participation in community life, and the unique geography of the island.For researchers studying healthy aging, Sardinia remains one of the world’s most valuable natural laboratories. Its mountain villages continue to provide important clues about how biology, lifestyle and social relationships can work together to help people live not only longer, but healthier lives.