MDPI All rights reserved Keywords: Body Coordination Test for Children; abilities; physical fitness; motor competence 2025 info:eu-repo/semantics/article Sports volume: 13 number: 10 Ðurović, Marko Stupar, Dušan Petković, Emilija Lilić, Ana Pelemiš, Vladan Mijalković, Stefan Stamenković, Stevan https://phaidrabg.bg.ac.rs/o:37313 doi:10.3390/sports13100333 ISSN: 2075-4663 eng Physical Activity and Sex as Predictors of Motor Development in Serbian Preschoolers application/pdf 238977 bytes Abstract Background/Objectives: Motor coordination is the essential ability that influences chil- dren’s overall physical development and their ability to engage in various activities. The development of motor skills and coordination continues for several years, as it is a gradual process that extends beyond the early stages of walking. The study aimed to describe the differences in genders and physical activity levels using the Body Coordination Test for Children (KTK) test battery to assess motor coordination in kindergarten children. Methods: The sample consisted of 814 participants, including both sexes (aged 5.57 ± 0.49 years). Participants were divided into two groups according to their involvement in physical activity (OPA) or physical inactivity (NO OPA). OPA had to have a minimum of 2 days per week of additional organized training/lessons with at least 60 min. Results: The results show significant gender differences in walking backwards; girls outperformed boys with a statistically significant mean difference of −3.11 (p = 0.01; 95% CI: −4.57 to −1.64). Similarly, for total motor quotient (MQ), girls scored higher than boys, with a significant mean difference of −4.92 (p = 0.01; 95% CI: −7.85 to −1.99). The results revealed that the OPA group consistently outperformed the NO OPA group across all subtests, with significant differences in Total MQ (p = 0.01). Conclusions: Our study results indicated that physically active children demonstrated better motor coordination in comparison to their inactive peers. This suggests that regular physical activity positively influences motor coordination development in children.