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1Junk food is now a staple of many Americans' diets. Advertising campaigns from the snack food companies, often featuring
2sports stars, send the message that we can neutralize any negative effects of consuming their products simply by getting
3more physical exercise. But recent studies show a lack of exercise is not to blame for rising obesity rates. Bad diets
4are. Interventions (干预) to help reduce junk food consumption are especially important for children and teenagers.
5Prevention is better than cure because obesity is so difficult to treat. Unfortunately, while health education has shown
6some success among young children, teens have been harder to reach. Now a large-scale study has tried an innovative
7approach to change teenagers5 attitudes towards healthy eating, and the results are promising. The researchers argued
8that previous interventions have probably been unsuccessful because of a major flaw: they focused on a future, healthier
9you and assumed that this would be enough motivation for teenagers. In contrast, the new intervention cleverly exploits
10teenagers5 instinct for rebelliousness and autonomy, and the value they place on social justice. To do this, researchers
11had students read an article on the food industry. It revealed a secret about the manipulative and deceptive strategies
12used to make junk food more addictive and characterize the products as healthy. The article also explained how
13advertising campaigns specifically target very young and poor people, causing harm for these vulnerable groups.
14Afterwards, the participants read a fictional survey of teens who wanted to “fight back against the companies by buying
15and eating less processed food". After the intervention, participants associated healthy eating with autonomy and social
16justice. The teenagers also rated healthy eating as being more appealing. Importantly, there were also some promising
17effects of the new intervention on actual behavior. A day later the students were offered a choice of snacks and drinks
18in a seemingly unrelated context. The teens chose healthy snacks and drinks (such as fruit or water) more often over
19unhealthy options (like biscuits and soda). Apparently associating a healthy diet with teenagers' own values seems to be
20a promising avenue to prevent obesity.
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