Determinant factors of cellular health among adolescent girls and boys

• Autor(a) principal: Langer, Raquel David, 1985-
• Data de Publicação: 2019
• Outros Autores: Guerra Júnior, Gil, 1960-, Gonçalves, Ezequiel Moreira, 1977-
• Tipo de documento: Artigo
• Título da fonte: Repositório da Produção Científica e Intelectual da Unicamp
• Texto Completo: https://hdl.handle.net/20.500.12733/1644017
• topic: Adolescentes; Saúde; Health; Adolescent; Determinant factors; Comunicação

Abstract: Several studies have demonstrated that cardiorespiratory fitness (CRF) and body adiposity are strong indicators of health during childhood and adolescence. However, it is not known if these parameters are associated with cellular health. For example, phase angle (PhA) is used to evaluate nutritional status and is an indicator of cellular health. In this study, we test if body composition and CRF have an influence on cellular health among adolescents of both genders. 203 girls (12.7 ± 1.3 years) and 221 boys (12.8 ± 1.3 years) were evaluated. The peak of height velocity (PHV) was used as an indicator of somatic maturation. The percentage of fat mass (%FM) was calculated based on skinfold thickness (triceps and calf). CRF was assessed with the Leger test. Bioelectrical impedance analysis provided parameters to calculate the values of PhA and fat-free mass (FFM). Bivariate correlation was used to verify the association between PHV with PhA, %FM, FFM and CRF. We used partial correlation to evaluate if PHV was a mediator of the relationship between PhA, %FM and CRF. A linear regression analysis adjusted by PHV was used to verify if variables (%FM, FFM and CRF) influenced cellular health among adolescents of both genders. The PHV showed a significant positive correlation with FFM in girls (r = 0.83, p<0.001) and boys (r = 0.83, p<0.001); with PhA in girls (r = 0.24, p<0.01) and boys (r = 0.38, p<0.001); and with %FM but only in girls (r = 0.15, p<0.05). PHV was negatively correlated with CRF in girls (r = -0.54, p<0.001) and boys (r = -0.20, p<0.01). Linear regression of the PhA adjusted by the PHV had an effect on %FM in girls (ß = 0.233, p<0.05) but not in boys (ß = 0.013, p=0.834), on CRF in boys (ß = 0.166, p<0.05) but not in girls (ß = 0.007, p=0.931), and on FFM in girls (ß = 0.697, p<0.001) and in boys (ß = 0.614, p<0.001). We discovered that PhA when controlled by somatic maturation seems to be more influenced by %FM in girls, CRF in boys, and FFM in both genders of adolescents. Interestingly, cellular health and CRF (for girls) and %FM (for boys) were not associated with PhA. This has implications for physical activity behavioral for improved health in adolescents of both genders