A1 Journal article (refereed)
Associations of fitness, motor competence, and adiposity with the indicators of physical activity intensity during different physical activities in children (2021)


Haapala, E. A., Gao, Y., Hartikainen, J., Rantalainen, T., & Finni, T. (2021). Associations of fitness, motor competence, and adiposity with the indicators of physical activity intensity during different physical activities in children. Scientific Reports, 11, Article 12521. https://doi.org/10.1038/s41598-021-92040-2


JYU authors or editors


Publication details

All authors or editorsHaapala, Eero A; Gao, Ying; Hartikainen, Jani; Rantalainen, Timo; Finni, Taija

Journal or seriesScientific Reports

eISSN2045-2322

Publication year2021

Volume11

Article number12521

PublisherNature Publishing Group

Publication countryUnited Kingdom

Publication languageEnglish

DOIhttps://doi.org/10.1038/s41598-021-92040-2

Publication open accessOpenly available

Publication channel open accessOpen Access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/76948


Abstract

We investigated the associations of peak oxygen uptake (V̇O2peak), ventilatory threshold (VT), muscle strength, motor competence (MC), and adiposity with the indicators of PA intensity during different physical activities used to create absolute PA intensity cut-offs among 35 children 7–11-years-of-age. V̇O2peak was defined as the highest V̇O2 achieved in the maximal cardiopulmonary exercise test (CPET) on a cycle ergometer, self-paced running, or running on a treadmill at 8 km/h. VT was defined from the CPET data. Peak isometric knee extensor and flexor strength was assessed by a dynamometer, MC by the Körperkoordination test für Kinder tests, and body composition by the bioelectrical impedance analysis. PA intensity was assessed using V̇O2 as a % of V̇O2reserve or V̇O2 at VT, mean amplitude deviation (MAD) measured by accelerometry, metabolic equivalent of task (MET), and muscle activity measured by textile electromyography during walking or running on a treadmill at 4, 6, and 8 km/h, playing hopscotch, walking up and down the stairs, self-paced walking, and self-paced running. Children with lower V̇O2peak, V̇O2 at VT, and MC operated at higher intensity level during given physical task than their peers with higher fitness and MC when PA intensity was expressed using relative PA intensity using V̇O2 as a % of V̇O2reserve or V̇O2 at VT (p < 0.05). MAD and METs during different tasks were not able to discriminate PA intensity between children with varying levels of physical fitness or MC. Traditionally used absolute measures of PA intensity based on accelerometry or MET underestimated PA intensity in children with lower V̇O2peak, V̇O2 at VT, and MC.


Keywordschildren (age groups)physical activitymotor skills (general)physical fitnessmaximal oxygen uptakemuscle strengthbody composition

Free keywordsepidemiology; physiology


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Ministry reportingYes

Reporting Year2021

JUFO rating1


Last updated on 2024-22-04 at 16:22