Increased food energy supply is more than sufficient to explain the US epidemic of obesity
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Open Access
- 1 December 2009
- journal article
- Published by Elsevier BV in The American Journal of Clinical Nutrition
- Vol. 90 (6), 1453-1456
- https://doi.org/10.3945/ajcn.2009.28595
Abstract
Background: The major drivers of the obesity epidemic are much debated and have considerable policy importance for the population-wide prevention of obesity. Objective: The objective was to determine the relative contributions of increased energy intake and reduced physical activity to the US obesity epidemic. Design: We predicted the changes in weight from the changes in estimated energy intakes in US children and adults between the 1970s and 2000s. The increased US food energy supply (adjusted for wastage and assumed to be proportional to energy intake) was apportioned to children and adults and inserted into equations that relate energy intake to body weight derived from doubly labeled water studies. The weight increases predicted from the equations were compared with weight increases measured in representative US surveys over the same period. Results: For children, the measured weight gain was 4.0 kg, and the predicted weight gain for the increased energy intake was identical at 4.0 kg. For adults, the measured weight gain was 8.6 kg, whereas the predicted weight gain was somewhat higher (10.8 kg). Conclusions: Increased energy intake appears to be more than sufficient to explain weight gain in the US population. A reversal of the increase in energy intake of ≈2000 kJ/d (500 kcal/d) for adults and of 1500 kJ/d (350 kcal/d) for children would be needed for a reversal to the mean body weights of the 1970s. Alternatively, large compensatory increases in physical activity (eg, 110–150 min of walking/d), or a combination of both, would achieve the same outcome. Population approaches to reducing obesity should emphasize a reduction in the drivers of increased energy intake.Keywords
This publication has 12 references indexed in Scilit:
- Estimating the changes in energy flux that characterize the rise in obesity prevalenceThe American Journal of Clinical Nutrition, 2009
- Physical activity energy expenditure has not declined since the 1980s and matches energy expenditures of wild mammalsInternational Journal of Obesity, 2008
- International Conference on Physical Activity and Obesity in Children: Summary Statement and RecommendationsPediatric Obesity, 2008
- Temporal trends in physical activity in England: The Health Survey for England 1991 to 2004Preventive Medicine, 2007
- Why Is The Developed World Obese?Published by National Bureau of Economic Research ,2007
- Estimating the effects of energy imbalance on changes in body weight in childrenThe American Journal of Clinical Nutrition, 2006
- Why Have Americans Become More Obese?Journal of Economic Perspectives, 2003
- The Road to Obesity or the Path to Prevention: Motorized Transportation and Obesity in ChinaObesity Research, 2002
- The world-wide growth in obesity: an economic research agendaHealth Economics, 2001
- Obesity in Britain: gluttony or sloth?BMJ, 1995