Pencegahan obesitas perlu dilakukan sejak remaja karena berpotensi menjadi obesitas saat dewasa. Penelitian ini bertujuan untuk mengetahui hubungan antara faktor predisposisi yaitu umur; jenis kelarnin; status gizi siswa; pengetahuan; sikap; status gizi ibu, faktor pemungkin yaitu status pekerjaan ibu; tingkat pendidikan ibu; dan pola makan, dan faktor penguat yaitu pengaruh teman sebaya dengan perilaku pencegahan obesitas. Penelitian ini bersifat kuantitatif dengan desain crosssectional. Pengambilan data dilakukan di SMP Negeri 1 Depok dengan instrumen kuesioner.Penelitian menemukan bahwa 69,1% siswa melakukan pencegahan obesitas. Analisis lebih lanjut menemukan bahwa status gizi siswa, asupan lemak harian, kebiasaan sarapan, konsumsi sayur, serta konsumsi susu dan hasil olahannya berhubungan dengan perilaku pencegahan obesitas pada siswa SMP di Kota Depok tahun 2012.Prevention of obesity needs to be done as adolescent because of the potential of becoming obese as adults. This study aims to determine the relationship between predisposing factors are age; sex; nutritional status of students; knowledge, attitude; maternal nutritional status, enabling factors, namely maternal employment status; level of maternal education, and diet, and reinforcing factors namely the influence of peer groups with obesity prevention behaviors. This study is quantitative with crosssectional design. Data is collected in state junior high school 1 Depok (SMP Negeri 1 Depok) with a questionnaire instrument.

The study found that 69.1% of students do prevention of obesity. Further analysis found that the nutritional status of students, the daily fat intake, breakfast habits, consumption of vegetables, as Well as the consumption of milk and processed products, was related to obesity prevention behaviors in students of state junior high school in Depok.