Intended for healthcare professionals



BMJ 2010; 340 doi: (Published 13 January 2010) Cite this as: BMJ 2010;340:c82

The United States’ epidemic of obesity arguably comes down to a single issue: increased food energy supply. Researchers predicted changes in weight based on changes in estimated energy intake in children and adults between the 1970s and 2000s. For children the measured weight gain and the predicted weight gain were identical at 4 kg. For adults the measured weight gain was 8.6 kg and the predicted weight gain was 10.8 kg. The authors say public health approaches to obesity must tackle the factors that drive increased energy intake (American Journal of Clinical Nutrition 2009;90:1453-6,

Highly paid professional goalkeepers prefer to dive left and right for penalty shoot-outs, even though staying still actually stops many more goals. A few (evidence based) goalies study videos of their opponents and do not dive for effect, but they face more criticism. Similarly, a midwife proposes that “action bias”—the need to appear heroic by doing something, rather than using watchful waiting—might be one of the numerous factors contributing to the rising …

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