Physical activity, sedentary time and bone tissue: effects of an 8-months interdisciplinary program with overweight/obese children
DOI:
https://doi.org/10.12820/rbafs.23e0053Palavras-chave:
atividade motora, estilo de vida sedentário, ossos, educação físicaResumo
A atividade física moderada-vigorosa tem efeito osteogênico reconhecido no osso. Além disso, o tempo sedentário e o acúmulo de gordura são desfavoráveis à saúde óssea. Este estudo objetivou: (1) examinar mudanças na composição corporal, tecido ósseo, atividade física e tempo sedentário; e (2) explorar se as mudanças nas intensidades de atividade física e no tempo sedentário estão associadas a mudanças nos resultados ósseos após um programa de intervenção interdisciplinar de base escolar. 53 estudantes com sobrepeso/obesidade (10,6 ± 3,5 anos; 26 meninas) participaram de aulas com atividade física. Área óssea, massa óssea e escore z de densidade mineral óssea, composição corporal (massa gorda, massa magra de gordura), atividade física, tempo sedentário e potenciais confundidores (vitamina D e status maturacional) foram avaliados no início e após 8 meses. Modelos Lineares Generalizados foram realizados e o nível de significância foi estabelecido em 5%. Alterações na atividade física moderada-vigorosa foram positivamente correlacionadas com as mudanças em todos os indicadores de massa óssea. Observou-se um efeito geral significativo da intervenção nas alterações do escore z de densidade mineral óssea, entretanto, após ajustes para mudanças no tempo sedentário e atividade física moderada-vigorosa, nenhum efeito foi observado. Por fim, variações no tempo sedentário e na atividade física moderada a vigorosa desempenham importante papel na densidade da massa óssea nos participantes do programa interdisciplinar.
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