Produção Nacional
Revisado por pares
Cross-sectional study of the association of body composition and physical fitness with bone status in children and adolescents from 11 to 16 years old
2013; BioMed Central; Volume: 13; Issue: 1 Linguagem: Inglês
10.1186/1471-2431-13-117
ISSN1471-2431
AutoresAnderson Márques de Moraes, Ezequiel Moreira Gonçalves, Vinícius Justino de Oliveira Barbeta, Gil Guerra‐Júnior,
Tópico(s)Obesity, Physical Activity, Diet
ResumoThe aim of the study was to verify the association between body composition and physical fitness with bone status in children and adolescents.A cross-sectional study was conducted with 300 healthy students (148 boys, 152 girls). Weight, height, fat and fat-free mass, and percentage of body fat (%BF) were evaluated, as were physical fitness (abdominal exercise, flexibility, and horizontal jump tests) and maximum oxygen consumption. Bone parameters (amplitude-dependent speed of sound; AD-SoS) and the Ultrasound Bone Profile Index (UBPI) were evaluated using DBM Sonic BP ultrasonography.In the study group, girls had higher bone parameter values than boys. A univariate analysis assessed in a stepwise multiple regression model was conducted. It showed that for boys, the %BF and height were significant independent variables for AD-SoS and UBPI, but the horizontal jump test only for AD-SoS (adjusted r2 = 0.274; p < 0.001), and pubertal maturation only for UBPI (adjusted r2 = 0.295; p < 0.001). For girls, age and %BF were identified as significant independent variables for AD-SoS and UBPI (adjusted r2 = 0.093; p < 0.001) but height only for AD-SoS (adjusted r2 = 0.408; p < 0.001).Variables related to growth (age, height, and pubertal maturation) are independent positive predictors for the bone parameters in both boys and girls. %BF is an independent negative predictor. For boys, the horizontal jump test was an independent positive predictor for AD-SoS, indicating that physical fitness related to the neuromotor system can influence the amount of bone present.
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