102089 20220426091138.0 doi 10.1177/1941738120913645 sideral 118201 ART-2020-118201 eng Gómez-Bruton, A. Universidad de Zaragoza (orcid)0000-0002-0520-1640 Association Between Physical Fitness and Bone Strength and Structure in 3- to 5-Year-Old Children 2020 Access copy available to the general public Unrestricted Background: The positive association between physical fitness and bone structure has been widely investigated in children and adolescents, yet no studies have evaluated this influence in young children (ie, preschoolers). Hypothesis: Fit children will present improved bone variables when compared with unfit children, and no sex-based differences will emerge in the sample. Study Design: Cross-sectional study. Level of Evidence: Level 3. Methods: Handgrip strength, standing long jump (SLJ), speed/agility, balance, and cardiorespiratory fitness (CRF) were assessed using the Assessing FITness levels in PREschoolers (PREFIT) test battery in 92 children (50 boys; age range, 3-5 years). A peripheral quantitative computed tomography scan was performed at 38% of the length of the nondominant tibia. Cluster analysis from handgrip strength, SLJ, speed/agility, and CRF was developed to identify fitness groups. Bone variables were compared between sexes and between cluster groups. The association between individual physical fitness components and different bone variables was also tested. Results: Three cluster groups emerged: fit (high values on all included physical fitness variables), strong (high strength values and low speed/agility and CRF), and unfit (low strength, speed/agility, and CRF). The fit group presented higher values than the strong and unfit groups for total and cortical bone mineral content, cortical area, and polar strength strain index (all P < 0.05). The fit group also presented a higher cortical thickness when compared with the unfit group (P < 0.05). Handgrip, SLJ, and speed/agility predicted all bone variables except for total and cortical volumetric bone mineral density. No differences were found for bone variables between sexes. Conclusion: The results suggest that global fitness in preschoolers is a key determinant for bone structure and strength but not volumetric bone mineral density. Clinical Relevance: Physical fitness is a determinant for tibial bone mineral content, structure, and strength in very young children. Performing physical fitness tests could provide useful information related to bone health in preschoolers. info:eu-repo/grantAgreement/ES/MEC/FPU014-04302 info:eu-repo/grantAgreement/ES/MICINN/EXERNET-DEP2005-00046 info:eu-repo/grantAgreement/ES/MINECO/BES-2014-068829 info:eu-repo/grantAgreement/ES/RETICS-ISCIII-ERDF/RD16-0022 info:eu-repo/grantAgreement/ES/UZ/JIUZ-2014-BIO-08 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 3.843 2020 SPORT SCIENCES 24 / 88 = 0.273 2020 Q2 T1 1.212 2020 Physical Therapy, Sports Therapy and Rehabilitation 2020 Q1 Orthopedics and Sports Medicine 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Marín-Puyalto, J. Universidad de Zaragoza (orcid)0000-0002-1042-542X Muñiz-Pardos, B. Lozano-Berges, G. Universidad de Zaragoza (orcid)0000-0002-0137-9900 Cadenas-Sanchez, C. Matute-Llorente, A. Universidad de Zaragoza (orcid)0000-0001-8500-1667 Gómez-Cabello, A. (orcid)0000-0001-6492-2512 Moreno, L.A. Universidad de Zaragoza (orcid)0000-0003-0454-653X Gonzalez-Agüero, A. Universidad de Zaragoza (orcid)0000-0002-1132-5906 Casajus, J.A. Universidad de Zaragoza (orcid)0000-0002-7215-6931 Vicente-Rodríguez, G. Universidad de Zaragoza (orcid)0000-0002-4303-4097 1006 255 Universidad de Zaragoza Dpto. Fisiatría y Enfermería Área Enfermería 1006 245 Universidad de Zaragoza Dpto. Fisiatría y Enfermería Área Educación Física y Depor. 12, 5 (2020), 431-440 Sports Health-A Multidisciplinary Approach Sports Health 1941-7381 297531 http://zaguan.unizar.es/record/102089/files/texto_completo.pdf Postprint 2722417 http://zaguan.unizar.es/record/102089/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:102089 articulos driver 2022-04-26-08:55:15 ARTICLE