This study has an aim of classification the physical fitness by children from the age of 6 to 8 , in accordance with the latest health standards criteria on the FitBack platform and to make an examination of the gender differences in basic components of fitness. The study takes into inclusion 519 students from primary schools in the Skopje region, who performed standardized anthropo-metric measures and fitness tests: body mass index, waist circumference, grip strength, standing long jump and 20 m shuttle run test.T he classification has been based on the criteria zones which have the indication of whether the child holds the recommended health threshold. The results have showed that only 54% of the children have a health-acceptable level of cardio-respiratory endurance, as a while large proportion demonstrate insufficient development of the muscle strength. As a range of 58% do not reach the criterioa standards for the explosive strength, and 67% for static hand strength. Gender differences are statistically significant for BMI, waist circumference, cardio- respiratory endurance and strength of the hand-grip, as of girls being classified in zones that indicate the necessity for improvement. These findings make a suggestion of early emergence for health fitness disparities and highlight the need for targeted and appropriate interventions for development in the school environment. In conclusion, the research makes a confirmation of the applicability of criterion-referenced fitness assessment by the young students and provides important insights for improvement of the educational practice and public health strategies. Early detection of weaknesses in fitness components may contribute to better health outcomes later in life.
Keywords: physical fitness, children, FitBack, cardiorespiratory endurance, muscle strength, criterion-referenced assessmen
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References
Artero, E. G., Ruiz, J. R., Ortega, F. B., España Romero, V., Vicente Rodríguez, G., Molnar, D., … & Castillo, M. J. (2011).
Muscular fitness, fatness and cardiovascular disease risk in children and adolescents. Pediatric Obesity, 6, 377–386.
Beunen, G. P., & Malina, R. M. (2008). Growth and biologic maturation: Relevance to athletic performance. In N. Armstrong & van Mechelen (Eds.), Paediatric exercise science and medicine (2nd ed., pp. 3–17). Oxford University Press.
Brazo-Sayavera, J., Šarabon, N., & Sember, V. (2024). Digital tools for school-based fitness monitoring: Applications, reliability and pedagogical relevance. European Physical Education Review, 30(1), 45–62. https://doi.org/10.1177/1356336X231234567 Brazo-Sayavera, J., Silva, D. R., Lang, J. J., Tomkinson, G. R., Agostinis-Sobrinho, C., Andersen, L. B., … & Dos Santos, L. (2024). Physical fitness surveillance and monitoring systems inventory for children and adolescents: a scoping review with a global perspective. Sports Medicine, 54(7), 1755-1769.
Gontarev, S., Kalac, R., Aleksovska-Velickovska, L., & Zivkovic, V. (2018). Physical fitness reference standards in Macedonian children and adolescents: The MAKFIT study. Nutrición Hospitalaria, 35(6), 1275–1286. https://doi.org/10.20960/nh.1881 Institute of Medicine (US), Food and Nutrition Board, & Committee on Fitness Measures and Health Outcomes in Youth. (2013). Fitness measures and health outcomes in youth. National Academies Press.
Jurak, G., Leskošek, B., Kovač, M., Sember, V., Soriano, J. M., & Starc, G. (2020). The SLOfit surveillance system: A Slovenian approach to monitoring child physical fitness and health. Journal of Physical Activity and Health, 17(1), 126–133. https://doi.org/10.1123/jpah.2019-0202
Jurak, G., Morrison, S. A., Soric, M., Leskošek, B., Kovač, M., Ocvirk, T., … & Starc, G. (2022). SLOfit Lifelong: A model for leveraging citizen science to promote and maintain physical fitness and physical literacy across the lifespan. Frontiers in public health, 10, 1002239.
Ortega, F. B., Artero, E. G., Ruiz, J. R., España-Romero, V., Jiménez-Pavón, D., Vicente-Rodríguez, G.,
… & Moreno, L. A. (2008). Physical fitness levels among European adolescents: The HELENA study. Pediatric Obesity, 3(1), 5–12 https://doi.org/10.1080/17477160701711975
Ortega, F. B., Leskošek, B., Blagus, R., Gil-Cosano, J. J., O’Keeffe, B. T., Starc, G., Štefan, L., … & Jurak, G. (2023). European fitness landscape in children and adolescents: Updated reference values, fitness maps, and country rankings based on nearly 8 million data points from 34 countries. British Journal of Sports Medicine, 57(5), 299–310. https://doi.org/10.1136/bjsports-2022-105750
Ortega, F. B., Ruiz, J. R., Castillo, M. J., & Sjöström, M. (2011). Physical fitness in childhood and adolescence: A powerful marker of health. International Journal of Obesity, 35(1), 1–12. https://doi.org/10.1038/ijo.2010.211
Ruiz, J. R., Castro-Piñero, J., Artero, E. G., Ortega, F. B., Sjöström, M., Suni, J., & Castillo, M. J. (2009). Predictive validity of health-related fitness in youth: A systematic review. British Journal of Sports Medicine, 43(12), 909–923. https://doi.org/10.1136/bjsm.2008.056499
Smith, J. J., Eather, N., Morgan, P. J., Plotnikoff, R. C., Faigenbaum, A. D., & Lubans, D. R. (2014). The health benefits of muscular fitness for children and adolescents: A systematic review and meta-analysis. Sports Medicine, 44(9), 1209–1223. https://doi.org/10.1007/s40279-014-0196-4
Sorić, M., Morrison, S. A., Ortega, F. B., Carraro, A., Csányi, T., Leskošek, B., Mäestu, J., Radisavljević-Janić, S., Sardinha, L.
B., Scheuer, C., Starc, G., Tammelin, T. H., & Jurak, G. (2025). Development of the FitBack online platform: Enhancing global child fitness assessment, health-related interpretation,