Influential role of lean soft tissue in the association between training volume and bone mineral density among male adolescent practitioners of impact-loading sports: ABCD Growth study

Autor(es)

Narciso, Pedro Henrique ^[1] ; Werneck, Andre Oliveira ^[2] ; Luiz-de-Marco, Rafael ^[3] ; Ventura Faustino-da-Silva, Yuri da Silva ^[3] ; Maillane-Vanegas, Santiago ^[4] ; Agostinete, Ricardo Ribeiro ^[3] ; Fernandes, Romulo Araujo ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Dept Phys Educ, Roberto Simonsen Ave 305, BR-19060900 Presidente Prudente, SP - Brazil

^[2] Univ Sao Paulo, Sch Publ Hlth, Sao Paulo - Brazil

^[3] Sao Paulo State Univ UNESP, Dept Phys Educ, Postgrad Program Movement Sci, Presidente Prudente - Brazil

^[4] Sao Paulo State Univ UNESP, Dept Phys Therapy, Postgrad Program Phys Therapy, Presidente Prudente - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BMC PEDIATRICS; v. 20, n. 1 OCT 28 2020.
• Citações Web of Science: 0

Resumo

Background Training volume is associated with direct and indirect pathways of bone adaptations. In addition, training volume is a training variable associated with lean soft tissue (LST), which has been shown to be an important predictor of areal bone mineral density (aBMD). Thus, the aim of this study is to investigate the influential role of lean soft tissue (LST) in the association between training volume and aBMD in male adolescent athletes. Methods This cross-sectional study was composed of 299 male adolescent athletes, mean age 14.1 (1.8) years, from 9 different weight-bearing modalities. The Ethical Board approved the investigation. The adolescents reported the number of days per week they trained and the time spent training and, from this, the training volume (h/wk) was estimated. The LST and aBMD were assessed by dual-energy x-ray absorptiometry. Somatic maturation was estimated by the peak of height velocity. Mediation analysis was performed to investigate the role of LST in the association between training volume and aBMD. Level of significance was set at p < 0.05. Results LST partially explained the association between training volume and aBMD in all body segments: upper limbs (58.37%; beta = 0.00142), lower limbs (28.35%; beta = 0.00156), spine (33.80%; beta = 0.00124), and whole body (41.82%, beta = 0.00131). There was no direct effect of training volume on aBMD in upper limbs (CI -0.00085 to 0.00287). Conclusion: The association between training volume and aBMD is influenced by LST in different body segments, mainly upper limbs, demonstrating that interventions aiming to enhance aBMD should also consider LST as an important variable to be managed. (AU)

• Processo FAPESP: 15/19710-3 - Análise de comportamentos de crianças durante o crescimento (ABCD - Growth Study)
• Beneficiário: Rômulo Araújo Fernandes
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/21935-1 - Associação entre volume de treino, composição corporal e qualidade do sono na predição da densidade mineral óssea em adolescentes: modelos de equação estrutural (ABCD - Growth Study)
• Beneficiário: Pedro Henrique Narciso Picchi
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica