TY - JOUR
T1 - Physical activity is inversely related to waist circumference in 12-y-old French adolescents
AU - Klein-Platat, C.
AU - Oujaa, M.
AU - Wagner, A.
AU - Haan, M. C.
AU - Arveiler, D.
AU - Schlienger, J. L.
AU - Simon, C.
N1 - Funding Information:
This study was made possible by the financial support of the Régime Local de la Caisse Régionale d’Assurance Maladie d’Alsace et de Moselle. We thank the medical staff of the schools for their participation in the data collection and F Ghazlane for her technical assistance. C Klein-Platat was supported by grants from the Danone Research Institute.
PY - 2005/1
Y1 - 2005/1
N2 - BACKGROUND AND OBJECTIVE: Waist circumference (W) has been shown to be a good predictor of cardiovascular risk. The aim of this study was to investigate whether physical activity (PA) is related to W in adolescents as previously shown in adults. DESIGN AND SUBJECTS: Cross-sectional population-based survey of 2714 12-y-old adolescents from the eastern part of France. MEASUREMENTS: Body mass index (BMI) and W were measured. Structured PA, active commuting to and from school and sedentary activities (SED), for example television viewing, computer/video games and reading and different potential confounders (dietary habits, parental overweight, family annual income tax and educational level) were assessed by a questionnaire. RESULTS: The adolescents had a mean BMI of 19.0 ± 3.4 kg/m2, and 20.2% of them were overweight, with no gender difference. Boys had a greater W than girls (67.6 ± 9.1 vs 65.7 ± 8.9 cm, P < 0.0001). In all, 42% of the girls and 25% of the boys did not practice any structured PA outside school and less than 40% of the adolescents commuted actively to school more than 20 min/day. About one-third of the adolescents devoted more than 2 h/day to SED. In univariate analyses, BMI was negatively associated with structured PA but significantly only for girls (P < 0.01) and positively associated with SED for both genders (P < 0.0001 for girls, P < 0.01 for boys). W was negatively associated with structured PA and positively associated with SED both in girls (P < 0.0001 and P = 0.03, respectively) and boys (P < 0.01 and P = 0.08, respectively). Multiple general linear models show that SED is associated with BMI, independently of structured PA, in both genders. On the other hand, structured PA was inversely associated with W, independently of SED. The inverse relation between structured PA and W persisted after additional adjustment on BMI, with a greater effect of PA for the adolescents with higher BMI. CONCLUSIONS: In 12-y-old adolescents, structured PA is inversely associated with W, an indicator of total adiposity but also more specifically of abdominal fat. This suggests that PA may have a beneficial effect on youth metabolic and cardiovascular risks, in particular in the presence of overweight.
AB - BACKGROUND AND OBJECTIVE: Waist circumference (W) has been shown to be a good predictor of cardiovascular risk. The aim of this study was to investigate whether physical activity (PA) is related to W in adolescents as previously shown in adults. DESIGN AND SUBJECTS: Cross-sectional population-based survey of 2714 12-y-old adolescents from the eastern part of France. MEASUREMENTS: Body mass index (BMI) and W were measured. Structured PA, active commuting to and from school and sedentary activities (SED), for example television viewing, computer/video games and reading and different potential confounders (dietary habits, parental overweight, family annual income tax and educational level) were assessed by a questionnaire. RESULTS: The adolescents had a mean BMI of 19.0 ± 3.4 kg/m2, and 20.2% of them were overweight, with no gender difference. Boys had a greater W than girls (67.6 ± 9.1 vs 65.7 ± 8.9 cm, P < 0.0001). In all, 42% of the girls and 25% of the boys did not practice any structured PA outside school and less than 40% of the adolescents commuted actively to school more than 20 min/day. About one-third of the adolescents devoted more than 2 h/day to SED. In univariate analyses, BMI was negatively associated with structured PA but significantly only for girls (P < 0.01) and positively associated with SED for both genders (P < 0.0001 for girls, P < 0.01 for boys). W was negatively associated with structured PA and positively associated with SED both in girls (P < 0.0001 and P = 0.03, respectively) and boys (P < 0.01 and P = 0.08, respectively). Multiple general linear models show that SED is associated with BMI, independently of structured PA, in both genders. On the other hand, structured PA was inversely associated with W, independently of SED. The inverse relation between structured PA and W persisted after additional adjustment on BMI, with a greater effect of PA for the adolescents with higher BMI. CONCLUSIONS: In 12-y-old adolescents, structured PA is inversely associated with W, an indicator of total adiposity but also more specifically of abdominal fat. This suggests that PA may have a beneficial effect on youth metabolic and cardiovascular risks, in particular in the presence of overweight.
KW - Adolescents
KW - Body mass index
KW - Physical activity
KW - Waist circumference
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U2 - 10.1038/sj.ijo.0802740
DO - 10.1038/sj.ijo.0802740
M3 - Review article
C2 - 15278108
AN - SCOPUS:11244289339
SN - 0307-0565
VL - 29
SP - 9
EP - 14
JO - International Journal of Obesity
JF - International Journal of Obesity
IS - 1
ER -