Energy balance
The rapid increase in global obesity prevalence is primarily driven by environmental factors—specifically the high availability of energy-dense foods and increasingly sedentary lifestyles—rather than changes in the human gene pool.
Focus on your environment, not just your genetics. The rise in obesity is driven by easy access to high-calorie foods and less physical movement. To manage weight, prioritize reducing the availability of energy-dense foods in your home and increase daily physical activity, as these environmental factors are the primary drivers of weight gain regardless of your genetic background.
The increasing rates of obesity cannot be explained exclusively by changes in the gene pool, although genetic variants that were previously ‘silent’ are now being triggered by the high availability of energy- and fat-dense foods, and by the increasingly sedentary lifestyle of modern societies.
Why this rating
Supported by multiple epidemiological surveys, prospective studies, and cross-sectional data cited in the text.
Source
Body-weight regulation: causes of obesity
J. Alfredo Martínéz · Proceedings of The Nutrition Society · 2000
DOI 10.1017/s0029665100000380
More from this paper
- Genetic susceptibility interacts with environmental factors to influence obesity risk, where specific gene variants (e.g., beta-3 adrenergic receptor, UCP-1) affect energy expenditure and fat oxidation, but these genes only contribute to obesity when triggered by energy-dense diets and sedentary behavior.Good
- Reducing physical activity levels and increasing sedentary time are major determinants of the current obesity epidemic, as evidenced by the inverse correlation between leisure-time physical activity and BMI, and the decline in energy expenditure due to labor-saving devices.Good
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