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Background: This study assessed the effect of a 1-year internet-based weight loss intervention for men. Methods: Four hundred forty-one overweight and obese men were randomized to intervention or delayed treatment. Participants completed a Web-based assessment of diet and physical activity behaviors and weekly tailored Web modules addressing weight-related behaviors. Results: At 12 months compared to controls, intervention men decreased percent of energy from saturated fat and increased grams of fiber and fruit/vegetable servings per 1.000 kcal (p values < 0.001) and walked 16 min more per day (p < 0.05). No between-group differences in body mass index (BMI), weight, or waist circumference were seen, but among completers, men in the highest tertile of intervention participation had lower weight (98.74 vs. 102.37 kg), BMI (32.38 vs. 33.46), and waist circumference (42.17 vs. 43.47 cm) compared to men who participated less often. Conclusions: The intervention improved diet and activity behaviors, but weight loss occurred only for those with the highest adherence.


Institute for Health and Ageing

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Journal Article

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