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High impact activity is related to lean but not to fat mass: findings from a population-based study in adolescents

Deere, Kevin und Sayers, Adrian und Rittweger, Jörn und Tobias, Jon (2012) High impact activity is related to lean but not to fat mass: findings from a population-based study in adolescents. Int J Epidemiol, 41 (4), Seiten 1124-1131.

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Kurzfassung

Background: Objective measures of physical activity calibrated against energy expenditure may have limited utility in studying relationships with musculoskeletal phenotypes. We wished to assess an alternative approach using an accelerometer calibrated according to impact loading. Methods: Of the 17-year olds from the Avon Longitudinal Study of Parents and Children (ALSPAC), 732 wore Newtest accelerometers while performing day-to-day activities for a mean of 5.8 days. Outputs were categorized as light, moderate, high and very high impact, based on the thresholds identified in 22 adolescents during graded activities. In subsequent regression analyses, activity data and fat mass were normalized by log transformation. Results: The number of counts relating to high impact activity was ~2% that of light impact activity, and 33% greater in boys when compared with girls. High impact activity was more strongly related to lean mass [light: 0.033 (95% CI -0.023 to 0.089), moderate: 0.035 (95% CI -0.010 to 0.080) and high: 0.044 (95% CI 0.010 to 0.078)] (b=SD change in outcome per doubling in activity, height adjusted, boys and girls combined). In contrast, lower impact activity was more strongly related to fat mass [light: -0.069 (95% CI -0.127 to -0.011), moderate: -0.060 (95% CI -0.107 to -0.014) and high: -0.033 (95% CI -0.069 to 0.003)]. In a more fully adjusted model including other activity types and fat/lean mass, lean mass was related to only high activity (boys and girls combined), whereas fat mass was related to only moderate activity (girls only).

Dokumentart:Zeitschriftenbeitrag
Titel:High impact activity is related to lean but not to fat mass: findings from a population-based study in adolescents
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Deere, KevinUniversity of Bristol
Sayers, AdrianUniversity of Bristol
Rittweger, Jörnjoern.rittweger@dlr.de
Tobias, JonUniversity of Bristol
Datum:2012
Erschienen in:Int J Epidemiol
Band:41
Seitenbereich:Seiten 1124-1131
Status:veröffentlicht
Stichwörter:Accelerometer, fat mass, lean mass, ALSPAC, impact loading
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Forschung unter Weltraumbedingungen
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R FR - Forschung unter Weltraumbedingungen
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben Beschleunigungsinduzierte Effekte
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Luft- und Raumfahrtmedizin > Weltraumphysiologie
Hinterlegt von: Jörn Rittweger
Hinterlegt am:14 Sep 2012 12:01
Letzte Änderung:12 Dez 2013 21:46

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