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Age-related patterns of vigorous-intensity physical activity in youth : the International Children's Accelerometry database

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Abstract
Physical activity declines during youth but most evidence reports on combined moderate and vigorous-intensity physical activity. We investigated how vigorous-intensity activity varies with age. Cross-sectional data from 24,025 participants (5.0-18.0 y; from 20 studies in 10 countries obtained 2008-2010) providing ≥ 1 day accelerometer data (International Children's Accelerometry Database (ICAD)). Linear regression was used to investigate age-related patterns in vigorous-intensity activity; models included age (exposure), adjustments for monitor wear-time and study. Moderate-intensity activity was examined for comparison. Interactions were used to investigate whether the age/vigorous-activity association differed by sex, weight status, ethnicity, maternal education and region. A 6.9% (95% CI 6.2, 7.5) relative reduction in mean vigorous-intensity activity with every year of age was observed; for moderate activity the relative reduction was 6.0% (5.6%, 6.4%). The age-related decrease in vigorous-intensity activity remained after adjustment for moderate activity. A larger age-related decrease in vigorous activity was observed for girls (- 10.7%) versus boys (- 2.9%), non-white (- 12.9% to - 9.4%) versus white individuals (- 6.1%), lowest maternal education (high school (- 2.0%)) versus college/university (ns) and for overweight/obese (- 6.1%) versus healthy-weight participants (- 8.1%). In addition to larger annual decreases in vigorous-intensity activity, overweight/obese individuals, girls and North Americans had comparatively lower average vigorous-intensity activity at 5.0-5.9 y. Age-related declines in vigorous-intensity activity during youth appear relatively greater than those of moderate activity. However, due to a higher baseline, absolute moderate-intensity activity decreases more than vigorous. Overweight/obese individuals, girls, and North Americans appear especially in need of vigorous-intensity activity promotion due to low levels at 5.0-5.9 y and larger negative annual differences.
Keywords
physical activity & health, Adolescent, Child, Epidemiology, ICAD, Motor activity

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MLA
Corder, Kirsten, et al. “Age-Related Patterns of Vigorous-Intensity Physical Activity in Youth : The International Children’s Accelerometry Database.” PREVENTIVE MEDICINE REPORTS, vol. 4, 2016, pp. 17–22.
APA
Corder, K., Sharp, S. J., Atkin, A. J., Andersen, L. B., Cardon, G., Page, A., … van Sluijs, E. M. (2016). Age-related patterns of vigorous-intensity physical activity in youth : the International Children’s Accelerometry database. PREVENTIVE MEDICINE REPORTS, 4, 17–22.
Chicago author-date
Corder, Kirsten, Stephen J Sharp, Andrew J Atkin, Lars B Andersen, Greet Cardon, Angie Page, Rachel Davey, et al. 2016. “Age-Related Patterns of Vigorous-Intensity Physical Activity in Youth : The International Children’s Accelerometry Database.” PREVENTIVE MEDICINE REPORTS 4: 17–22.
Chicago author-date (all authors)
Corder, Kirsten, Stephen J Sharp, Andrew J Atkin, Lars B Andersen, Greet Cardon, Angie Page, Rachel Davey, Anders Grøntved, Pedro C Hallal, Kathleen F Janz, Katarzyna Kordas, Susi Kriemler, Jardena J Puder, Luis B Sardinha, Ulf Ekelund, and Esther MF van Sluijs. 2016. “Age-Related Patterns of Vigorous-Intensity Physical Activity in Youth : The International Children’s Accelerometry Database.” PREVENTIVE MEDICINE REPORTS 4: 17–22.
Vancouver
1.
Corder K, Sharp SJ, Atkin AJ, Andersen LB, Cardon G, Page A, et al. Age-related patterns of vigorous-intensity physical activity in youth : the International Children’s Accelerometry database. PREVENTIVE MEDICINE REPORTS. 2016;4:17–22.
IEEE
[1]
K. Corder et al., “Age-related patterns of vigorous-intensity physical activity in youth : the International Children’s Accelerometry database,” PREVENTIVE MEDICINE REPORTS, vol. 4, pp. 17–22, 2016.
@article{8501713,
  abstract     = {Physical activity declines during youth but most evidence reports on combined moderate and vigorous-intensity physical activity. We investigated how vigorous-intensity activity varies with age. Cross-sectional data from 24,025 participants (5.0-18.0 y; from 20 studies in 10 countries obtained 2008-2010) providing ≥ 1 day accelerometer data (International Children's Accelerometry Database (ICAD)). Linear regression was used to investigate age-related patterns in vigorous-intensity activity; models included age (exposure), adjustments for monitor wear-time and study. Moderate-intensity activity was examined for comparison. Interactions were used to investigate whether the age/vigorous-activity association differed by sex, weight status, ethnicity, maternal education and region. A 6.9% (95% CI 6.2, 7.5) relative reduction in mean vigorous-intensity activity with every year of age was observed; for moderate activity the relative reduction was 6.0% (5.6%, 6.4%). The age-related decrease in vigorous-intensity activity remained after adjustment for moderate activity. A larger age-related decrease in vigorous activity was observed for girls (- 10.7%) versus boys (- 2.9%), non-white (- 12.9% to - 9.4%) versus white individuals (- 6.1%), lowest maternal education (high school (- 2.0%)) versus college/university (ns) and for overweight/obese (- 6.1%) versus healthy-weight participants (- 8.1%). In addition to larger annual decreases in vigorous-intensity activity, overweight/obese individuals, girls and North Americans had comparatively lower average vigorous-intensity activity at 5.0-5.9 y. Age-related declines in vigorous-intensity activity during youth appear relatively greater than those of moderate activity. However, due to a higher baseline, absolute moderate-intensity activity decreases more than vigorous. Overweight/obese individuals, girls, and North Americans appear especially in need of vigorous-intensity activity promotion due to low levels at 5.0-5.9 y and larger negative annual differences.},
  author       = {Corder, Kirsten and Sharp, Stephen J and Atkin, Andrew J and Andersen, Lars B and Cardon, Greet and Page, Angie and Davey, Rachel and Grøntved, Anders and Hallal, Pedro C and Janz, Kathleen F and Kordas, Katarzyna and Kriemler, Susi and Puder, Jardena J and Sardinha, Luis B and Ekelund, Ulf and van Sluijs, Esther MF},
  issn         = {2211-3355},
  journal      = {PREVENTIVE MEDICINE REPORTS},
  keywords     = {physical activity & health,Adolescent,Child,Epidemiology,ICAD,Motor activity},
  language     = {eng},
  pages        = {17--22},
  title        = {Age-related patterns of vigorous-intensity physical activity in youth : the International Children's Accelerometry database},
  url          = {http://dx.doi.org/10.1016/j.pmedr.2016.05.006},
  volume       = {4},
  year         = {2016},
}

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