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Objectively measured physical activity and sedentary time in European adolescents: the HELENA study

(2011) AMERICAN JOURNAL OF EPIDEMIOLOGY. 174(2). p.173-184
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Abstract
The authors' aim in this cross-sectional study was to characterize levels of objectively measured physical activity and sedentary time in adolescents from 9 European countries. The study comprised 2,200 European adolescents (1,184 girls) participating in the HELENA cross-sectional study (2006-2008). Physical activity was measured by accelerometry and was expressed as average intensity (counts/minute) and amount of time (minutes/day) spent engaging in moderate-to vigorous-intensity physical activity (MVPA). Time spent in sedentary behaviors was also objectively measured. Cardiorespiratory fitness was measured by means of the 20-m shuttle run test. Level of maternal education was reported by the adolescents. A higher proportion of boys (56.8% of boys vs. 27.5% of girls) met the physical activity recommendations of at least 60 minutes/day of MVPA. Adolescents spent most of the registered time in sedentary behaviors (9 hours/day, or 71% of the registered time). Both average intensity and MVPA were higher in adolescents with high cardiorespiratory fitness, and sedentary time was lower in the high-fitness group. There were no physical activity or sedentary time differences between maternal education categories. These data provide an objective measure of physical activity and amount of time spent in sedentary behaviors in a relatively large number of European adolescents.
Keywords
SOCIOECONOMIC-STATUS, RISK-FACTORS, CARDIOVASCULAR-DISEASE, CARDIORESPIRATORY FITNESS, HEALTHY LIFE-STYLE, social class, TELEVISION VIEWING TIME, sedentary lifestyle, physical fitness, adolescent, obesity, exercise, motor activity, BODY-FAT, PEDIATRIC OBESITY, Europe, METABOLIC SYNDROME, RECOMMENDED LEVELS

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Chicago
Ruiz, Jonatan R, Francisco B Ortega, David Martínez-Gómez, Idoia Labayen, Luis A Moreno, Ilse De Bourdeaudhuij, Yannis Manios, et al. 2011. “Objectively Measured Physical Activity and Sedentary Time in European Adolescents: The HELENA Study.” American Journal of Epidemiology 174 (2): 173–184.
APA
Ruiz, J. R., Ortega, F. B., Martínez-Gómez, D., Labayen, I., Moreno, L. A., De Bourdeaudhuij, I., Manios, Y., et al. (2011). Objectively measured physical activity and sedentary time in European adolescents: the HELENA study. AMERICAN JOURNAL OF EPIDEMIOLOGY, 174(2), 173–184.
Vancouver
1.
Ruiz JR, Ortega FB, Martínez-Gómez D, Labayen I, Moreno LA, De Bourdeaudhuij I, et al. Objectively measured physical activity and sedentary time in European adolescents: the HELENA study. AMERICAN JOURNAL OF EPIDEMIOLOGY. 2011;174(2):173–84.
MLA
Ruiz, Jonatan R, Francisco B Ortega, David Martínez-Gómez, et al. “Objectively Measured Physical Activity and Sedentary Time in European Adolescents: The HELENA Study.” AMERICAN JOURNAL OF EPIDEMIOLOGY 174.2 (2011): 173–184. Print.
@article{1983774,
  abstract     = {The authors' aim in this cross-sectional study was to characterize levels of objectively measured physical activity and sedentary time in adolescents from 9 European countries. The study comprised 2,200 European adolescents (1,184 girls) participating in the HELENA cross-sectional study (2006-2008). Physical activity was measured by accelerometry and was expressed as average intensity (counts/minute) and amount of time (minutes/day) spent engaging in moderate-to vigorous-intensity physical activity (MVPA). Time spent in sedentary behaviors was also objectively measured. Cardiorespiratory fitness was measured by means of the 20-m shuttle run test. Level of maternal education was reported by the adolescents. A higher proportion of boys (56.8\% of boys vs. 27.5\% of girls) met the physical activity recommendations of at least 60 minutes/day of MVPA. Adolescents spent most of the registered time in sedentary behaviors (9 hours/day, or 71\% of the registered time). Both average intensity and MVPA were higher in adolescents with high cardiorespiratory fitness, and sedentary time was lower in the high-fitness group. There were no physical activity or sedentary time differences between maternal education categories. These data provide an objective measure of physical activity and amount of time spent in sedentary behaviors in a relatively large number of European adolescents.},
  author       = {Ruiz, Jonatan R and Ortega, Francisco B and Mart{\'i}nez-G{\'o}mez, David and Labayen, Idoia and Moreno, Luis A and De Bourdeaudhuij, Ilse and Manios, Yannis and Gonzalez-Gross, Marcela and Mauro, Beatrice and Molnar, Denes and Widhalm, Kurt and Marcos, Ascenci{\'o}n and Beghin, Laurent and Castillo, Manuel J and Sj{\"o}str{\"o}m, Michael},
  issn         = {0002-9262},
  journal      = {AMERICAN JOURNAL OF EPIDEMIOLOGY},
  keyword      = {SOCIOECONOMIC-STATUS,RISK-FACTORS,CARDIOVASCULAR-DISEASE,CARDIORESPIRATORY FITNESS,HEALTHY LIFE-STYLE,social class,TELEVISION VIEWING TIME,sedentary lifestyle,physical fitness,adolescent,obesity,exercise,motor activity,BODY-FAT,PEDIATRIC OBESITY,Europe,METABOLIC SYNDROME,RECOMMENDED LEVELS},
  language     = {eng},
  number       = {2},
  pages        = {173--184},
  title        = {Objectively measured physical activity and sedentary time in European adolescents: the HELENA study},
  url          = {http://dx.doi.org/10.1093/aje/kwr068},
  volume       = {174},
  year         = {2011},
}

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