The Impact of Training Load on Bone Mineral Density of Adolescent Swimmers: A Structural Equation Modeling Approach

Autor(es)

Agostinete, Ricardo Ribeiro ; Maillane-Vanegas, Santiago ; Lynch, Kyle R. ; Turi-Lynch, Bruna ; Coelho-e-Silva, Manuel J. ; Campos, Eduardo Zapaterra ; Cayres, Suziane Ungari ; Fernandes, Romulo Arajuo

• Tipo de documento: Artigo Científico
• Fonte: PEDIATRIC EXERCISE SCIENCE; v. 29, n. 4, p. 9-pg., 2017-11-01.

Resumo

Purpose: To investigate the mediating effect of muscle mass on the relationship between training load and bone density in adolescent swimmers. Methods: A cross-sectional study involving 87 control and 22 swimmers aged 10-19 years (overall sample: n = 109). Swimmers had a minimum of 1 year of competition in regional and national championships, and control adolescents reported 1 year without any organized sport. Bone density was the main outcome (dual-energy X-ray absorptiometry), which was measured in upper limbs, lower limbs, spine, and whole body. Monthly training load was the independent variable, while the mediation effect of lean soft tissue was assessed. Maturity offset, age, inflammation, and vitamin D intake were treated as covariates. Results: Swimmers had lower bone density than controls; there was a significant and positive relationship between training load and muscle mass. In boys, training load presented a negative correlation with bone density in lower limbs [r = -.293; 95% confidence interval (CI), -.553 to -.034]. In girls, training load was negatively related to bone mineral density in lower limbs (r = .563; 95% CI, -.770 to -.356) and whole body (r = -.409; 95% CI, -.609 to -.209). Conclusion: Training load had a negative relationship on bone density of swimmers of both sexes, independently of the positive effect of lean soft tissue on bone density. (AU)

• Processo FAPESP: 16/20377-0 - Impacto da prática de esportes organizados no risco de fratura óssea entre adolescentes: ABCD - growth study
• Beneficiário: Kyle Robinson Lynch
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 16/06920-2 - Aplicação de modelos alométricos no entendimento da relação entre prática esportiva, maturação biológica e variáveis ósseas em adolescentes
• Beneficiário: Ricardo Ribeiro Agostinete
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Mestrado
• Processo FAPESP: 15/13543-8 - Mecanismos inflamatórios ligando a prática esportiva em alta intensidade e o desenvolvimento ósseo entre jovens
• Beneficiário: Ricardo Ribeiro Agostinete
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 16/20354-0 - Impacto de diferentes modalidades esportivas na ocorrência e gravidade de sintomas musculoesqueléticos em adolescentes: ABCD growth study
• Beneficiário: Santiago Maillane Vanegas
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 15/04961-0 - Efeito da prática esportiva sobre a relação entre inflamação, espessura médio-intimal e fluxo sanguíneo arterial de adolescentes
• Beneficiário: Suziane Ungari Cayres
• Modalidade de apoio: Bolsas no Brasil - Doutorado