The scientific knowledge about diet, fatness, and health is constantly changing and being challenged (Gard & Wright, 2005; Kirk, 2006). The validity of the Body Mass Index (BMI), for example, has fallen into disrepute (Ross, 2005), the food pyramid has had several rearrangements (Kinney, 2005), the alleged health benefits of a high carbohydrate/low fat diet are being challenged (Paoli, Rubini, Volek, & Grimaldi, 2013), and ideas about being" overweight" or" underweight" and their relationship to poor health have been turned on their head (Gard & Wright, 2005). Despite the scientific uncertainties concerning diet, body composition, and health, many teachers-particularly physical education teachers (eg, Trost, 2006)-continue to believe that the world is in the grips of an" obesity epidemic" and it is their duty to promote the virtues of physical activity and the problems of fat. Although many of these teachers are well …
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Richard Pringle