Adolescents are vulnerable to nutritional problems due to unhealthy eating habits and insufficient physical activity. Sedentary behavior and lack of balanced nutrition knowledge may be related to adolescent nutritional status. This study aimed to analyze the relationship between sedentary behavior and balanced nutrition knowledge with nutritional status among adolescents. The study used a cross-sectional design on 106 adolescents with proportional stratified random sampling. Instruments included ASAQ questionnaire for sedentary behavior, balanced nutrition knowledge questionnaire, and anthropometric measurements of nutritional status based on BMI/A z-score using WHO Anthro Plus. Analysis used Spearman Rho test. Results showed that the majority of respondents were 14 years old (35.8%), female (52.8%), participating in extracurricular activities (69.8%). High category sedentary behavior (59.4%) averaged 6.31 hours/day. Nutrition knowledge was poor category (53.8%). Nutritional status was mostly normal (64.2%), with distribution of severe malnutrition (0.9%), undernutrition (8.5%), overweight (18.9%), obesity (7.5%). There was no significant relationship between sedentary behavior and nutritional status (p=0.315) and balanced nutrition knowledge with nutritional status (p=0.449). These results indicate that sedentary behavior is not related to nutritional status because it is influenced by social media and family factors. Nutrition knowledge is not related to nutritional status because adolescents find it difficult to apply knowledge due to peer influence and environment.
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