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dc.creatorBarbosa, Joãoes_ES
dc.creatorMarqués, Mário C.es_ES
dc.creatorForte, Pedroes_ES
dc.creatorSantos, Catarina C.es_ES
dc.creatorNeiva, Henrique P.es_ES
dc.creatorIzquierdo Redín, Mikeles_ES
dc.creatorMarinho, Danieles_ES
dc.identifier.citationBarbosa, J., Marques, M. C., Forte, P., Santos, C. C., Neiva, H. P., Izquierdo, M., & Marinho, D. A. (2022). Effects of a modified backpack model on ground reaction forces in children of different ages during walking and running. Journal of Men’s Health, 18(5), 109.
dc.description.abstractBackground: Backpacks are widely used by children to carry different objects and the literature supports that most backpacks contain excessive weight. To minimize the loading effects (i.e., ground reaction force), modified backpacks have been tested. However, the effects of elastics on shoulders straps are yet to be studied. Thus, the aim of this study was to test and compare the effect on the vertical ground reaction force of a standard backpack with a modified one with elastic straps while walking and running. Methods: 9 children (5 boys and 4 girls) were included in the group G-5 (age: 11.0 ± 0.3 years-old; body mass: 35.3 ± 7.3 kg; height: 1.41 ± 0.1 m) and twelve (7 boys and 5 girls) in G-9 (age: 15.0 ± 0.7 years-old; body mass: 56.7 ± 11.2 kg; height: 1.63 ± 0.1 m). Participants attended a single session and were initially asked to walk and then run over a force plate. The software Ergotest MuscleLab v8.0 (MuscleLab, Ergotest Innovation, Porsgrunn, Norway) was linked to the force platform and was used to collect and export data. The level of statistical significance was set at p ≤ 0.05. Additionally, the effect size of the differences verified on T-Tests was calculated based on Cohen’s d. Results: Statistically significant differences between a common backpack and a modified one with straps (p < 0.05) were observed for the variables time and force when walking. Regarding the running condition, the time variable did not differ significantly between the backpacks. However, the force variable changed considerably between backpack types (p < 0.05). The new straps minimized the forces magnitude, resulting in lower stress. Conclusions: The modified backpacks with shoulder elastic straps reduced the ground reaction force and impact when walking and running. The study may encourage other researchers to assess the effects of different movements (such as jumping or rotating) on ground reaction force.en
dc.description.sponsorshipThis work is supported by national funding through the Portuguese Foundation for Science and Technology, I.P., under the project UIDB/04045/2020.en
dc.publisherIMR Pressen
dc.relation.ispartofJournal of Mens Health 2022 18(5): 109en
dc.rights© 2022 The Author(s). This is an open access article under the CC BY 4.0 license.en
dc.subjectModified strapsen
dc.subjectGround reaction forcesen
dc.titleEffects of a modified backpack model on ground reaction forces in children of different ages during walking and runningen
dc.typeArtículo / Artikuluaes
dc.contributor.departmentCiencias de la Saludes_ES
dc.contributor.departmentOsasun Zientziakeu
dc.rights.accessRightsAcceso abierto / Sarbide irekiaes
dc.type.versionVersión publicada / Argitaratu den bertsioaes

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© 2022 The Author(s). This is an open access article under the CC BY 4.0 license.
Except where otherwise noted, this item's license is described as © 2022 The Author(s). This is an open access article under the CC BY 4.0 license.

El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
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