The consequences of using different epoch lengths on the classification of accelerometer based sedentary behaviour and physical activity.

We examined the influence of using different epoch lengths on the classification accuracy of laboratory-controlled sedentary behaviour (SB), and free-living total time and time spent in bouts of SB and moderate-to-vigorous physical activity (MVPA), in children and adolescents. We used two studies in...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Teatske M Altenburg, Xinhui Wang, Evi van Ekris, Lars Bo Andersen, Niels Christian Møller, Niels Wedderkopp, Mai J M Chinapaw
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fd3da2862a584b3f8ebdab92198779aa
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:fd3da2862a584b3f8ebdab92198779aa
record_format	dspace
spelling	oai:doaj.org-article:fd3da2862a584b3f8ebdab92198779aa2021-12-02T20:09:11ZThe consequences of using different epoch lengths on the classification of accelerometer based sedentary behaviour and physical activity.1932-620310.1371/journal.pone.0254721https://doaj.org/article/fd3da2862a584b3f8ebdab92198779aa2021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0254721https://doaj.org/toc/1932-6203We examined the influence of using different epoch lengths on the classification accuracy of laboratory-controlled sedentary behaviour (SB), and free-living total time and time spent in bouts of SB and moderate-to-vigorous physical activity (MVPA), in children and adolescents. We used two studies including accelerometer-derived data of: 1) controlled activities, i.e. seven sedentary, one standing and one dancing (n = 90); 2) free-living activities (n = 902). For the controlled-activity data, we calculated percentages of time classified as SB and MVPA. For the free-living data, we calculated medians (25th-75th percentiles) of total time and time spent in bouts of SB and MVPA. Applying 8counts/5seconds, 25counts/15seconds and 100counts/60seconds for SB on controlled-activity data revealed respectively (1) 92-96%, 89-99% and 98-100% of sedentary time accurately classified as SB (activity- and age-dependent); (2) 91-98%, 88-99% and 97-100% of standing time classified as SB (age-dependent); (3) 25-37%, 20-25% and 25-38% of dancing time classified as SB (age-dependent). Using longer epochs, children's total time in SB and MVPA decreased while time accumulated in bouts of SB and MVPA accumulated in bouts increased. We conclude that a 60-second epoch seems preferable when the aim is to classify sedentary behaviour, while a shorter epoch length is needed to capture children's short bursts of MPVA. Furthermore, we should be aware that a longer epoch results in averaging of intensities to the middle category.Teatske M AltenburgXinhui WangEvi van EkrisLars Bo AndersenNiels Christian MøllerNiels WedderkoppMai J M ChinapawPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 7, p e0254721 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Teatske M Altenburg Xinhui Wang Evi van Ekris Lars Bo Andersen Niels Christian Møller Niels Wedderkopp Mai J M Chinapaw The consequences of using different epoch lengths on the classification of accelerometer based sedentary behaviour and physical activity.
description	We examined the influence of using different epoch lengths on the classification accuracy of laboratory-controlled sedentary behaviour (SB), and free-living total time and time spent in bouts of SB and moderate-to-vigorous physical activity (MVPA), in children and adolescents. We used two studies including accelerometer-derived data of: 1) controlled activities, i.e. seven sedentary, one standing and one dancing (n = 90); 2) free-living activities (n = 902). For the controlled-activity data, we calculated percentages of time classified as SB and MVPA. For the free-living data, we calculated medians (25th-75th percentiles) of total time and time spent in bouts of SB and MVPA. Applying 8counts/5seconds, 25counts/15seconds and 100counts/60seconds for SB on controlled-activity data revealed respectively (1) 92-96%, 89-99% and 98-100% of sedentary time accurately classified as SB (activity- and age-dependent); (2) 91-98%, 88-99% and 97-100% of standing time classified as SB (age-dependent); (3) 25-37%, 20-25% and 25-38% of dancing time classified as SB (age-dependent). Using longer epochs, children's total time in SB and MVPA decreased while time accumulated in bouts of SB and MVPA accumulated in bouts increased. We conclude that a 60-second epoch seems preferable when the aim is to classify sedentary behaviour, while a shorter epoch length is needed to capture children's short bursts of MPVA. Furthermore, we should be aware that a longer epoch results in averaging of intensities to the middle category.
format	article
author	Teatske M Altenburg Xinhui Wang Evi van Ekris Lars Bo Andersen Niels Christian Møller Niels Wedderkopp Mai J M Chinapaw
author_facet	Teatske M Altenburg Xinhui Wang Evi van Ekris Lars Bo Andersen Niels Christian Møller Niels Wedderkopp Mai J M Chinapaw
author_sort	Teatske M Altenburg
title	The consequences of using different epoch lengths on the classification of accelerometer based sedentary behaviour and physical activity.
title_short	The consequences of using different epoch lengths on the classification of accelerometer based sedentary behaviour and physical activity.
title_full	The consequences of using different epoch lengths on the classification of accelerometer based sedentary behaviour and physical activity.
title_fullStr	The consequences of using different epoch lengths on the classification of accelerometer based sedentary behaviour and physical activity.
title_full_unstemmed	The consequences of using different epoch lengths on the classification of accelerometer based sedentary behaviour and physical activity.
title_sort	consequences of using different epoch lengths on the classification of accelerometer based sedentary behaviour and physical activity.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/fd3da2862a584b3f8ebdab92198779aa
work_keys_str_mv	AT teatskemaltenburg theconsequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity AT xinhuiwang theconsequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity AT evivanekris theconsequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity AT larsboandersen theconsequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity AT nielschristianmøller theconsequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity AT nielswedderkopp theconsequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity AT maijmchinapaw theconsequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity AT teatskemaltenburg consequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity AT xinhuiwang consequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity AT evivanekris consequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity AT larsboandersen consequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity AT nielschristianmøller consequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity AT nielswedderkopp consequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity AT maijmchinapaw consequencesofusingdifferentepochlengthsontheclassificationofaccelerometerbasedsedentarybehaviourandphysicalactivity
_version_	1718375160306728960

The consequences of using different epoch lengths on the classification of accelerometer based sedentary behaviour and physical activity.

Ejemplares similares