@article{3e2683a226cd4f9cb39acd2eef9e359f,
title = "Age-related patterns of vigorous-intensity physical activity in youth: The International Children's Accelerometry Database",
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 = "Adolescent, Child, Epidemiology, ICAD, Motor activity",
author = "{the International Children's Accelerometry Database} and Kirsten Corder and Sharp, {Stephen J.} and Atkin, {Andrew J.} and Andersen, {L. B.} and G. Cardon and Angie Page and Rachel Davey and A. Gr{\o}ntved and P. Hallal and Janz, {Kathleen F.} and Katarzyna Kordas and S. Kriemler and Puder, {J. J.} and Sardinha, {L. B.} and Ulf Ekelund and {van Sluijs}, {Esther M.F.} and G. Cardon and A. Cooper and Puder, {J. J.} and Sardinha, {L. B.} and Andersen, {L. B.} and S. Anderssen and Esliger, {D. W.} and A. Gr{\o}ntved and P. Hallal and Janz, {K. F.} and K. Kordas and S. Kriemler and R. Pate and J. Reilly and J. Salmon and Sherar, {L. B.} and A. Timperio",
note = "Funding Information: We would like to thank all participants and funders of the original studies that contributed data to ICAD. The pooling of the data was funded through a grant from the National Prevention Research Initiative (Grant number: G0701877) ( http://www.mrc.ac.uk/research/initiatives/national-prevention-research-initiative-npri/ ). The funding partners relevant to this award are: British Heart Foundation; Cancer Research UK; Department of Health; Diabetes UK; Economic and Social Research Council; Medical Research Council; Research and Development Office for the Northern Ireland Health and Social Services; Chief Scientist Office; Scottish Executive Health Department; The Stroke Association; Welsh Assembly Government and World Cancer Research Fund. This work was additionally supported by the Medical Research Council [ MC_UU_12015/3 ; MC_UU_12015/7 ], Bristol University , Loughborough University and Norwegian School of Sport Sciences . We acknowledge the Centre for Diet and Activity Research (CEDAR), a UKCRC Public Health Research Centre of Excellence. Funding from the British Heart Foundation , Cancer Research UK , Economic and Social Research Council , Medical Research Council , the National Institute for Health Research , and the Wellcome Trust , under the auspices of the UK Clinical Research Collaboration, is gratefully acknowledged. We also gratefully acknowledge the contribution of Professor Chris Riddoch, Professor Ken Judge and Dr. Pippa Griew to the development of ICAD. Funding Information: The ICAD Collaborators include: Prof LB Andersen, University of Southern Denmark, Odense, Denmark (Copenhagen School Child Intervention Study (CoSCIS)); Prof S Anderssen, Norwegian School for Sport Science, Oslo, Norway (European Youth Heart Study (EYHS), Norway); Prof G Cardon, Department of Movement and Sports Sciences, Ghent University, Belgium (Belgium Pre-School Study); Centers for Disease Control and Prevention (CDC), National Center for Health Statistics (NCHS), Hyattsville, MD USA (National Health and Nutrition Examination Survey (NHANES)); Prof A Cooper, Centre for Exercise, Nutrition and Health Sciences, University of Bristol, UK (Personal and Environmental Associations with Children's Health (PEACH)); Dr. R Davey, Centre for Research and Action in Public Health, University of Canberra, Australia (Children's Health and Activity Monitoring for Schools (CHAMPS)); Prof U Ekelund, Norwegian School of Sport Sciences, Oslo, Norway and MRC Epidemiology Unit, University of Cambridge, UK; Dr. DW Esliger, School of Sports, Exercise and Health Sciences, Loughborough University, UK; Dr. A Gr{\o}ntved, University of Southern Denmark, Odense, Denmark (European Youth Heart Study (EYHS), Denmark); Dr. P Hallal, Postgraduate Program in Epidemiology, Federal University of Pelotas, Brazil (1993 Pelotas Birth Cohort); Prof KF Janz, Department of Health and Human Physiology, Department of Epidemiology, University of Iowa, Iowa City, US (Iowa Bone Development Study); Dr. K Kordas, School of Social and Community Medicine, University of Bristol, UK (Avon Longitudinal Study of Parents and Children (ALSPAC)); Dr. S Kriemler, Epidemiology, Biostatistics and Prevention Institute, University of Z{\"u}rich, Switzerland (Kinder-Sportstudie (KISS)); Dr. A Page, Centre for Exercise, Nutrition and Health Sciences, University of Bristol, UK; Prof R Pate, Department of Exercise Science, University of South Carolina, Columbia, US (Physical Activity in Pre-school Children (CHAMPS-US) and Project Trial of Activity for Adolescent Girls (Project TAAG)); Dr. JJ Puder, Service of Endocrinology, Diabetes and Metabolism, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Switzerland (Ballabeina Study); Prof J Reilly, Physical Activity for Health Group, School of Psychological Sciences and Health, University of Strathclyde, Glasgow, UK (Movement and Activity Glasgow Intervention in Children (MAGIC)); Prof. J Salmon, School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Australia (Children Living in Active Neigbourhoods (CLAN)); Prof LB Sardinha, Exercise and Health Laboratory, Faculty of Human Movement, Technical University of Lisbon, Portugal (European Youth Heart Study (EYHS), Portugal); Dr. LB Sherar, School of Sports, Exercise and Health Sciences, Loughborough University, UK; Dr. A Timperio, Centre for Physical Activity and Nutrition Research, Deakin University Melbourne, Australia (Healthy Eating and Play Study (HEAPS)); Dr. EMF van Sluijs, MRC Epidemiology Unit, University of Cambridge, UK (Sport, Physical activity and Eating behavior: Environmental Determinants in Young people (SPEEDY)). The UK Medical Research Council and the Wellcome Trust (Grant ref.: 102215/2/13/2) and the University of Bristol provide core support for ALSPAC. Publisher Copyright: {\textcopyright} 2016 The Authors.",
year = "2016",
month = dec,
day = "1",
doi = "10.1016/j.pmedr.2016.05.006",
language = "English (US)",
volume = "4",
pages = "17--22",
journal = "Preventive Medicine Reports",
issn = "2211-3355",
publisher = "Elsevier Inc.",
}