Food intake has a larger impact on weight loss than exercise, according to a new study in the International Journal of Obesity. A review of school-based interventions found that weight loss could be achieved by diet changes alone, while exercise without diet changes was not effective. Researchers explain it is difficult to “out-exercise” dietary intake. For example, a one-hour bicycle ride burns 240 calories and, in comparison, one small order of French fries—which are consumed in much less than an hour—contains nearly the same number of calories.

Katz DL. Unfattening our children: forks over feet. Int J Obes. 2011;35:33-37.

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