Living Near the Sea Linked to Increased Lifespan, Study Finds

New research indicates that living close to the sea may be literally linked to living longer. A study analyzing census data in the United States has found a correlation between proximity to coastal areas and greater longevity, while unexpectedly, living near inland bodies of water might be associated with a shorter life expectancy.

The findings, published in the journal Environmental Research, suggest that the benefits of “blue spaces”—natural bodies of water—are complex and depend on the type and location of the water.

Coastal Benefits

The study observed that individuals residing within approximately 50 kilometers (about 31 miles) of the coast tended to experience improved quality of life and potentially longer lifespans. Globally, coastal residents are expected to live about a year or more above the average life expectancy of 79 years.

“The residents of the coast probably lived longer due to a variety of interconnected factors,” stated Jianyong “Jamie” Wu, a member of the research team, in a press release.

Conversely, the analysis revealed a different trend for those living inland. People residing near large inland water bodies, such as lakes or rivers covering at least 10 square kilometers (approximately 3.86 square miles), showed a tendency towards shorter life expectancies, with an average of around 78 years.

Study Methodology

The research team examined 66,263 census areas across the United States. They analyzed life expectancy in relation to proximity to water bodies, while also controlling for socioeconomic and demographic factors to ensure the accuracy of the results.

Exploring the Causes

Several factors are proposed to mediate the relationship between coastal living and longevity. These include:

• Milder temperatures
• Improved air quality
• Increased opportunities for recreational activities
• Better transportation networks
• Reduced vulnerability to droughts

These elements could contribute to the positive health outcomes associated with coastal environments.

Inland Water Bodies and Health Risks

The study also pointed to factors that may explain the contrasting trend observed for inland water bodies. Potential contributors to shorter life expectancies in these areas include:

• Higher levels of pollution
• Prevalence of poverty
• Limited opportunities for physical activity
• Increased risk of flooding

“Pollution, poverty, lack of opportunities to be physically active, and a higher risk of flooding are the main triggers for these differences,” explained Yanni Cao, a co-author of the study.

Correlation vs. Causation

The researchers acknowledge that correlation does not always imply causation. The observed link between proximity to water and life expectancy could be influenced by underlying factors, such as income.

For instance, coastal areas might attract individuals with higher incomes due to their desirability and potentially higher cost of living. Since income is known to affect life expectancy, this could be a mediating factor. Alternatively, coastal regions might offer greater employment and income-generating opportunities, which in turn contribute to longevity. In both scenarios, income appears to be a key determinant, but the direct causal link from the water itself requires further investigation.

This research highlights the intricate relationship between our environment and our health, suggesting that where we live can have a tangible impact on how long we live.

Datos clave
| Factor | Impacto en la esperanza de vida |
|—|—|
| Vivir cerca del mar | Mayor longevidad |
| Vivir cerca de grandes cuerpos de agua interiores | Menor longevidad |
| Factores mediadores | Clima, calidad del aire, actividades recreativas, ingresos, contaminación |

Fuente: Xataka (https://www.xataka.com/medicina-y-salud/sabiamos-que-vivir-cerca-mar-nos-ganar-anos-vida-que-no-sabiamos-que-era-literalmente)

Datos clave