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Effects of Backpacks on Ground Reaction Forces in Children of Different Ages When Walking, Running, and Jumping

2019Journal article Open access
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dc.contributor.authorBarbosa, João P.
dc.contributor.authorMarques, MC
dc.contributor.authorNeiva, Henrique
dc.contributor.authorEsteves, Dulce
dc.contributor.authorAlonso-Martínez, Alicia M
dc.contributor.authorIzquierdo, Mikel
dc.contributor.authorRamirez-Campillo, Rodrigo
dc.contributor.authorAlvarez, Cristian
dc.contributor.authorMarinho, Daniel
dc.date.accessioned2020-01-23T10:36:06Z
dc.date.available2020-01-23T10:36:06Z
dc.date.issued2019
dc.description.abstractBackpacks for transporting school loads are heavily utilized by children, and their mechanical advantages have been allowing children to transport heavy loads. These heavy loads may increase ground reaction forces (GRFs), which can have a negative effect on joints and bone health. The aim of this study was to investigate the effect of backpacks on the GRFs generated by children during walking, running, and jumping. Twenty-one children from the fifth (G-5, n = 9) and ninth (G-9, n = 12) grades walked, ran, and jumped over a force plate. When walking, the G-5 had GRF increments in the first (17.3%; p < 0.001) and second (15.4%; p < 0.001) peak magnitude, and in the total integral of the vertical force (20%; p < 0.001), compared to the control condition (i.e., no backpack), and the G-9 had increments of 10.4%, 9%, and 9% (p < 0.001), respectively. The G-9 did not prolong their total stance time (p > 0.05), unlike the G-5 (p = 0.001). When running, total stance time increased 15% (p < 0.001) and 8.5% (p < 0.001) proportionally to the relative load carried, in the G-5 and G-9, respectively. Peak GRF did not increase in any group when running or landing from a jump over an obstacle. It was found that GRF was affected by the backpack load when walking and running. However, when landing from a jump with the backpack, schoolchildren smoothed the landing by prolonging the reception time and thus avoiding GRF peak magnitudes.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBarbosa, J. P., Marques, M. C., Neiva, H. P., Esteves, D., Alonso-Martínez, A. M., Izquierdo, M., ... & Marinho, D. A. (2019). Effects of Backpacks on Ground Reaction Forces in Children of Different Ages When Walking, Running, and Jumping. International Journal of Environmental Research and Public Health, 16(24), 5154. doi:10.3390/ijerph16245154.pt_PT
dc.identifier.doi10.3390/ijerph16245154pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.6/8650
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationResearch Center in Sports Sciences, Health Sciences and Human Development
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectBackpackpt_PT
dc.subjectChildrenpt_PT
dc.subjectLoad-carriagept_PT
dc.subjectGaitpt_PT
dc.subjectGround reaction forcespt_PT
dc.titleEffects of Backpacks on Ground Reaction Forces in Children of Different Ages When Walking, Running, and Jumpingpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleResearch Center in Sports Sciences, Health Sciences and Human Development
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FDTP%2F04045%2F2019/PT
oaire.citation.issue24pt_PT
oaire.citation.startPage5154pt_PT
oaire.citation.titleInternational Journal of Environmental Research and Public Healthpt_PT
oaire.citation.volume16pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameMARQUES
person.familyNameNeiva
person.familyNameEsteves
person.familyNameIzquierdo
person.familyNameRamirez-Campillo
person.familyNameMarinho
person.givenNameMÁRIO
person.givenNameHenrique
person.givenNameDulce
person.givenNameMikel
person.givenNameRodrigo
person.givenNameDaniel
person.identifier588266
person.identifier287814
person.identifier421832
person.identifier.ciencia-idEA13-7532-0A6D
person.identifier.ciencia-id8B1F-4EDD-8754
person.identifier.ciencia-id791C-4AFB-A5FD
person.identifier.ciencia-id9719-C6E1-643A
person.identifier.ciencia-id471B-F3CC-479A
person.identifier.orcid0000-0002-5812-1580
person.identifier.orcid0000-0001-9283-312X
person.identifier.orcid0000-0002-6368-2577
person.identifier.orcid0000-0002-1506-4272
person.identifier.orcid0000-0003-2035-3279
person.identifier.orcid0000-0003-2351-3047
person.identifier.ridM-5893-2013
person.identifier.ridA-4894-2010
person.identifier.ridM-1258-2016
person.identifier.scopus-author-id24773599000
person.identifier.scopus-author-id37079568500
person.identifier.scopus-author-id55193154600
person.identifier.scopus-author-id7103111881
person.identifier.scopus-author-id55675682700
person.identifier.scopus-author-id15022568500
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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