This study aimed to examine the relationship between gadget use, physical activity, and physical fitness among students of SD Muhammadiyah 4 Surabaya. A quantitative correlational design was employed involving 41 fifth- and sixth-grade students. Gadget use was measured using the Questionnaire for Screen Time of School-Age Children (QueST), physical activity using the Physical Activity Questionnaire for Children (PAQ-C), and physical fitness using the Indonesian Student Fitness Test (Tes Kebugaran Siswa Indonesia [TKSI] Phase C). Data were analyzed using Spearman rank correlation and multiple linear regression. The results showed a significant negative relationship between gadget use and physical fitness (rs = -0.433, p = 0.005) and a significant positive relationship between physical activity and physical fitness (rs = 0.590, p < 0.001). Partial regression analysis revealed that physical activity had a significant positive effect on physical fitness (β = 0.603, p = 0.001), whereas gadget use had no significant effect (β = -0.015, p = 0.920). These findings suggest that physical activity is a more influential factor in physical fitness than gadget use among elementary school students.
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