Background: A good The Internet gives excellent benefits for education. Uncontrolled internet use causes internet addiction may cause a poor outcome, such as academic failure. Family functions hypothetically correlate with internet addiction and academic performance in adolescents at school. The research aims to see the correlations among family function with internet addiction and academic performance in adolescents at senior high school. Method: Participants consisted of 305 adolescents from public senior high school students aged 14-18 years old. This research is using an analytical, cross-sectional method. The family function was assessed by the Family Assessment Device-Indonesian version (FAD-Ina). Internet addiction was assessed with Internet addiction Test Indonesian version (IAT-Ina). The student’s academic performance was obtained from the school report card at that time. Results: The result of this research shows that 76.4% of senior high school students have an internet addiction. The family function had a positive correlation and significant result with internet addiction (R=0.336, p <0.05). The family function had a negative correlation and significant result with academic performance (R=0.176, p <0.05). Internet addiction had a positive correlation and significant result with academic performance (R=0.128, p <0.05). Good family function in adolescents has four times decrease for internet addiction risk compared with bad family function (OR=4.290). Conclusion: This research shows that there was a 76.4% prevalence of internet addiction in adolescents at senior high school. A good family function can decrease internet addiction and increase academic performance in the adolescent. Good family function decreased internet addiction risk four times.

Internet addiction become higher problem during pandemic COVID-19 because of a lot of use internet activity. Adolescences is the highest population whose suffer for Internet Addiction. Hatha Yoga had been studied could reduce of internet addiction in adolescents, however have not understand how does its work in biology molecular perspectives. We developed yoga capsule program for Adolescence whose suffering internet addiction, to evaluate effect D5 Dopamine Receptor mRNA expression and Nuclear Factor Activated Kappa B Cell (NF-κB) mRNA expression in peripheral lymphocyte cell. Adolescent whose suffer Internet addiction are recruited from senior high school. After internet addiction assessment using Internet Addiction Test Indonesian version (IAT-Ina), 34 adolescents divided into 2 group with random allocation became Hatha Yoga Group and Control Group. Sample advised 60 minutes and three times per week on 8 weeks program, led by Yoga instructor certified. Before and post intervention all participant had check D5 Dopamine receptor mRNA Expression and NF-κB mRNA expression in peripheral lymphocyte cell and also IAT-Ina score. Hatha Yoga Online allows treatment for internet addiction in adolescent during pandemic COVID-19 and future. Forthcoming result may contribute about Hatha Yoga could affect the biology molecular to reduce symptoms and sign in Internet addiction.