""The differences in daily energy expenditure between folks in the industrialized world and subsistence populations are not as great as we might have expected, whereas the shifts in diets that we're seeing with populations that are moving from a subsistence life way into a market-oriented way of life are much, much greater," said William Leonard, PhD, professor of Preventive Medicine in the Division of Behavioral Medicine and the Watkins Family Professor of Global Health in the Weinberg College of Art and Sciences, who was a co-author of the study."
"In the current study, an international team of scientists studied energy expenditure and two measures of obesity - body fat percentages and body mass index (BMI) - in more than 4,000 adults across six continents representing a range of geographic locations, lifestyles and economic status. Data were compiled from the International Atomic Energy Agency Doubly Labelled Water Database. The doubly labeled water method uses the rate of isotope depletion from the body water pool to calculate the rate of carbon dioxide production and, therefore, energy expenditure over a 7- to 14-day period."
An international multi-center study measured energy expenditure and obesity indicators in over 4,000 adults across six continents, covering diverse geographic locations, lifestyles, and economic conditions. Daily energy expenditure was quantified using the doubly labeled water method over 7–14 days, while body fat percentage and BMI assessed obesity. Differences in daily energy expenditure between industrialized and subsistence populations were smaller than expected. Dietary changes accompanying transitions from subsistence to market-oriented lifestyles were substantially larger and correlated with higher obesity prevalence. Global economic development aligns with rising obesity, contributing to over four million deaths annually.
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