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Arterial Stiffness in Heart-Healthy Indigenous Tsimane Forager-Horticulturalists.
Tianyu Cao1,2, Edhitt C Linares3, Raul Quispe Gutierrez3
1Department of Anthropology University of California Santa Barbara Santa Barbara CA USA.
Journal of the American Heart Association
|July 14, 2025
Summary
Indigenous Tsimane adults exhibit significantly lower arterial stiffness and higher elasticity compared to US populations, even with comorbidities. This suggests lifestyle factors in subsistence populations promote superior cardiovascular health.
Area of Science:
- Cardiovascular Health
- Arterial Physiology
- Comparative Population Studies
Background:
- Arterial stiffness in rural, low-risk populations remains understudied.
- This study compares arterial stiffness metrics in Tsimane forager-horticulturalists with US cohorts.
Purpose of the Study:
- To assess and compare arterial stiffness and elasticity in Tsimane adults versus representative US populations.
- To investigate the influence of lifestyle and cardiometabolic risk factors on arterial health.
Main Methods:
- Cross-sectional study involving 490 Tsimane adults and large US cohorts (MESA, FHS Gen3).
- Measured arterial elasticity (C1, C2) using tonometry and carotid-femoral pulse wave velocity (PWV).
- Compared Tsimane metrics with US participants, adjusting for age and comorbidities.
Main Results:
- Tsimane adults showed significantly higher large artery elasticity (C1) and small artery elasticity (C2) than US cohorts.
- Tsimane participants had lower carotid-femoral PWV, with minimal age-related increase.
- Even Tsimane individuals with multiple comorbidities had better arterial elasticity than healthy Americans.
Conclusions:
- Tsimane forager-farmers exhibit substantially lower arterial stiffness throughout adulthood compared to urbanized, sedentary populations.
- Lifestyle factors associated with subsistence living appear to confer significant arterial health benefits.
- Differences are only partially explained by conventional cardiometabolic risk factors, highlighting the role of other lifestyle elements.
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