000048111 001__ 48111
000048111 005__ 20210121114545.0
000048111 0247_ $$2doi$$a10.1371/journal.pone.0121238
000048111 0248_ $$2sideral$$a93733
000048111 037__ $$aART-2015-93733
000048111 041__ $$aeng
000048111 100__ $$0(orcid)0000-0001-9126-5976$$aAibar Solana, Alberto$$uUniversidad de Zaragoza
000048111 245__ $$aPhysical Education: The Effect of Epoch Lengths on Children’s Physical Activity in a Structured Context
000048111 260__ $$c2015
000048111 5060_ $$aAccess copy available to the general public$$fUnrestricted
000048111 5203_ $$aBackground
Despite a consensus emerging that affirms that shorter epochs should be used in youth to correctly register physical activity levels in free-living conditions, little is known about its effect on children’s physical activity conducted in structured periods of time. This study analyzed the effect that epoch length (1, 2, 3, 5, 10, 15, 30 and 60s) may have on different physical activity intensities in physical education lessons.
Methods
A sample of 1912 individualmeasures of physical education lessons were measured with a GT3X accelerometer. Data were collected from 1227 Swiss Elementary school students recruited in 17 elementary schools. PE lessons lasted from 45 minutes to one and a half hours. Data, originally collected in 1-s epoch, were then reintegrated into 2s, – 3s – 5s – 10s – 15s – 30s –60s epochs.
Results
Longer epochs were associated with higher levels of light (F = 8197.6, p < .001), moderate (F = 2708.17, p < .001), and moderate-to-vigorous physical activity (F = 888.08, p < .001). However, longer epochs showed lower levels of sedentary activity (F = 31714.33, p < .001) and vigorous physical activity (F = 1910.97, p < .001). Bias increased in all PA intensities when shorter epochs were compared with longer epochs. There were statistically significant differences in compliance with physical education guidelines (?2 = 989.27, p<.001), showing higher levels with longer epochs.
Conclusion
PA context may have some influence on the effects that epoch length have on PA estimates, more specifically on MVPA. Nevertheless, the use of a high-frequency sampling interval should be used to more accurately assess children’s PA.
000048111 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000048111 590__ $$a3.057$$b2015
000048111 591__ $$aMULTIDISCIPLINARY SCIENCES$$b11 / 62 = 0.177$$c2015$$dQ1$$eT1
000048111 592__ $$a1.427$$b2015
000048111 593__ $$aAgricultural and Biological Sciences (miscellaneous)$$c2015$$dQ1
000048111 593__ $$aMedicine (miscellaneous)$$c2015$$dQ1
000048111 593__ $$aBiochemistry, Genetics and Molecular Biology (miscellaneous)$$c2015$$dQ1
000048111 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000048111 700__ $$aChanal, Julien
000048111 7102_ $$13001$$2187$$aUniversidad de Zaragoza$$bDpto. Expres.Music.Plást.Corp.$$cÁrea Didáctica Expres.Corporal
000048111 773__ $$g10, 4 (2015), e0121238[10 pp]$$pPLoS One$$tPloS one$$x1932-6203
000048111 8564_ $$s732626$$uhttps://zaguan.unizar.es/record/48111/files/texto_completo.pdf$$yVersión publicada
000048111 8564_ $$s88869$$uhttps://zaguan.unizar.es/record/48111/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000048111 909CO $$ooai:zaguan.unizar.es:48111$$particulos$$pdriver
000048111 951__ $$a2021-01-21-11:18:27
000048111 980__ $$aARTICLE