Cross-sectional associations of objectively-measured physical activity and sedentary time with body composition and cardiorespiratory fitness in mid-childhood : the PANIC study
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| Deutscher übersetzter Titel: | Querschnittsverbindungen von objektiv gemessener körperlicher Aktivität und sitzender Zeit auf die Körperzusammensetzung und kardiorespiratorischer Fitness im Grundschulalter : die PANIC-Studie |
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| Autor: | Collings, Paul J.; Westgate, Kate; Väistö, Juuso; Wijndaele, Katrien; Atkin, Andrew J.; Haapala, Eero A.; Lintu, Niina; Laitinen, Tomi; Ekelund, Ulf; Brage, Søren; Lakka, Timo A. |
| Erschienen in: | Sports medicine |
| Veröffentlicht: | 47 (2017), 4, S. 769-780, Lit. |
| Format: | Literatur (SPOLIT) |
| Publikationstyp: | Zeitschriftenartikel |
| Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
| Sprache: | Englisch |
| ISSN: | 0112-1642, 1179-2035 |
| DOI: | 10.1007/s40279-016-0606-x |
| Schlagworte: | |
| Online Zugang: | |
| Erfassungsnummer: | PU201705003149 |
| Quelle: | BISp |
Abstract des Autors
Background: The minimum intensity of physical activity (PA) that is associated with favourable body composition and cardiorespiratory fitness (CRF) remains unknown.
Objective: To investigate cross-sectional associations of PA and sedentary time (ST) with body composition and CRF in mid-childhood.
Methods: PA, ST, body composition and CRF were measured in a population-based sample of 410 children (aged 7.6 +/- 0.4 years). Combined heart-rate and movement sensing provided estimates of PA energy expenditure (PAEE, kJ/kg/day) and time (min/day) at multiple fine-grained metabolic equivalent (MET) levels, which were also collapsed to ST and light PA (LPA), moderate PA (MPA) and vigorous PA (VPA). Fat mass index (FMI, kg/m2), trunk fat mass index (TFMI, kg/m2) and fat-free mass index (FFMI, kg/m2.5) were derived from dual-energy X-ray absorptiometry. Maximal workload from a cycle ergometer test provided a measure of CRF (W/kg FFM). Linear regression and isotemporal substitution models were used to investigate associations.
Results: The cumulative time above 2 METs (221 J/min/kg) was inversely associated with FMI and TFMI in both sexes (p < 0.001) whereas time spent above 3 METs was positively associated with CRF (p </= 0.002); CRF increased and adiposity decreased dose-dependently with increasing MET levels. ST was positively associated with FMI and TFMI (p < 0.001) but there were inverse associations between all PA categories (including LPA) and adiposity (p </= 0.002); the magnitude of these associations depended on the activity being displaced in isotemporal substitution models but were consistently stronger for VPA. PAEE, MPA and to a greater extent VPA, were all positively related to CRF (p </= 0.001).
Conclusions: PA exceeding 2 METs is associated with lower adiposity in mid-childhood, whereas PA of 3 METs is required to benefit CRF. VPA was most beneficial for fitness and fatness, from a time-for-time perspective, but displacing any lower-for-higher intensity may be an important first-order public health strategy.