Densidade mineral Ãssea em adolescentes femininas: relaÃÃo entre sobrepeso e atividade fÃsica diÃria

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The aim of this study was to examine the possible correlations between bone mineral density (BMD), the overweight and the levels of physical activity in female adolescents aged 14-17 years. Daily physical activity level was measured by questionnaire in 321 adolescents. Voluntarily, 70 of these adolescents, participation of the anthropometric measurements of height (cm) and body weight (kg) to the calculation of body mass index (BMI) per age for the classification of the degree of overweight. Following, they were mesured with dual energy X-ray absorptiometry (DXA) which examinated the body composition and BMD of the lumbar vertebrae (L2-L4). As results, the fat mass, measured by DXA, had high correlation with BMI (r = 0,80; p <.0001). The BMD was inversaly correlated with the menarcheal age (r = −0,29; p = 0,013) and directly correlated with BMI (r = 0,44; p = 0,0001), % fat mass (r = 0,30; p = 0,011), and lean mass (r = 0,49; p <,0001). The mean value of the bone mineral content (BMC) were significantly higher in overweight adolescents comparing to eutrofics school children (p = 0,014). The study concluded that physical activity had a positive influence in BMD and BMC of adolescents activity eutrofics and overweight, the BMI shows to be a good indicator of adolescents fat mass. The research provide informations of the importance of the physical activity in adolescents to prevent of the ostopenia and osteoporosis.

ASSUNTO(S)

densidade mineral Ãssea daily physical activity adolescentes femininas body mass index composiÃÃo corporal bone mineral density Ãndice de massa corporal body composition educacao fisica atividade fÃsica diÃria female adolescents

ACESSO AO ARTIGO

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