Physical activity patterns and biomarkers of cardiovascular disease risk in hunter-gatherers.
Level 4 - case-series / case-control
Cross-sectional observational study in a single indigenous population
PubMed 27723159 · doi:10.1002/ajhb.22919
What was done
Researchers measured moderate-to-vigorous physical activity (MVPA) and cardiovascular health indicators in the Hadza, a modern hunter-gatherer population in Northern Tanzania. MVPA was assessed using continuous heart rate monitoring in 46 participants recruited from two camps. Blood pressure was measured in 198 participants as part of a broader health survey, and cardiovascular biomarkers (C-reactive protein, total cholesterol, HDL, LDL, and triglycerides) were measured in a subset of 23 participants.
What was found
Hadza participants engaged in 134.92 ± 8.6 min/day of MVPA across their lifespan, exceeding levels in large United States epidemiological cohorts by more than 14-fold. The study reported a low prevalence of hypertension and optimal cardiovascular biomarker profiles, though exact numerical values for blood pressure, C-reactive protein, and lipid subfractions were not reported in the abstract.
Why it matters
These findings provide direct physiological data on physical activity and biomarker profiles in an active foraging population, supporting evolutionary models regarding human aerobic requirements and cardiovascular health.
Limits
The observational, cross-sectional design cannot establish causality. Sample sizes were small for continuous heart rate monitoring (n = 46) and blood biomarkers (n = 23). Hard cardiovascular endpoints were not tracked, and confounding lifestyle factors such as diet were not detailed in the abstract.
Cited by
- supports Hunter-gatherer populations typically walked approximately 7 to 10 miles (about 14,000 steps) per day.