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Overweight pada remaja merupakan salah satu masalah gizi yang dapat meningkatkan risiko terjadinya penyakit tidak menular di masa mendatang. Pengetahuan gizi seimbang dan aktivitas fisik merupakan faktor yang diduga berhubungan dengan kejadian overweight pada remaja. Penelitian ini bertujuan untuk mengetahui hubungan pengetahuan gizi seimbang dan aktivitas fisik dengan kejadian overweight pada remaja di SMA PGRI 2 Kota Jambi. Penelitian ini dilaksanakan di SMA PGRI 2 Kota Jambi pada bulan Mei 2026 menggunakan desain cross sectional. Populasi dalam penelitian ini adalah seluruh siswa kelas X dan XI SMA PGRI 2 Kota Jambi sebanyak 145 siswa dengan sampel sebanyak 64 responden yang dipilih menggunakan teknik proportional random sampling. Data pengetahuan gizi seimbang diperoleh melalui kuesioner pengetahuan gizi, aktivitas fisik diukur menggunakan kuesioner Physical Activity Level (PAL), dan kejadian overweight ditentukan berdasarkan pengukuran berat badan dan tinggi badan menggunakan indikator IMT/U. Analisis data dilakukan secara univariat dan bivariat menggunakan uji Chi-Square. Hasil penelitian menunjukkan bahwa sebagian besar responden memiliki pengetahuan gizi kurang sebanyak 21 responden (32,8%), aktivitas fisik ringan sebanyak 34 responden (53,1%), dan mengalami overweight sebanyak 33 responden (51,6%). Hasil uji Chi-Square menunjukkan terdapat hubungan yang signifikan antara pengetahuan gizi seimbang dengan kejadian overweight (p-value = 0,000) dan terdapat hubungan yang signifikan antara aktivitas fisik dengan kejadian overweight (p-value = 0,000) pada remaja di SMA PGRI 2 Kota Jambi. Diperlukan peningkatan edukasi gizi dan aktivitas fisik sebagai upaya pencegahan overweight pada remaja.

Overweight among adolescents represents a nutritional issue that can increase the risk of non-communicable diseases in the future. Balanced nutrition knowledge and physical activity represent factors suspected to be associated with overweight incidence among adolescents. This study aimed to determine the relationship between balanced nutrition knowledge and physical activity with overweight incidence among adolescents at PGRI 2 Senior High School Jambi City. This study was conducted at PGRI 2 Senior High School Jambi City in May 2026 using a cross-sectional design. The population in this study comprised all tenth and eleventh grade students at PGRI 2 Senior High School Jambi City totaling 145 students, with a sample of 64 respondents selected using a proportional random sampling technique. Balanced nutrition knowledge data were obtained through a nutrition knowledge questionnaire, physical activity was measured using the Physical Activity Level questionnaire, and overweight incidence was determined based on weight and height measurements using body mass index for age indicator. Data analysis involved univariate and bivariate analyses using the Chi Square test. The results demonstrated that the majority of respondents possessed poor nutrition knowledge, accounting for 21 respondents representing 32.8 percent, light physical activity, accounting for 34 respondents representing 53.1 percent, and experienced overweight, accounting for 33 respondents representing 51.6 percent. The Chi Square test results revealed a significant relationship between balanced nutrition knowledge and overweight incidence with a p value of 0.000, as well as a significant relationship between physical activity and overweight incidence with a p value of 0.000 among adolescents at PGRI 2 Senior High School Jambi City. Enhanced nutrition education and physical activity are required as prevention efforts against adolescent overweight.