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Comparison of muscle morphology, electromyographic activity and force production between prepubertal boys and girls

2001Conference object Open access
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dc.contributor.authorBarbosa, Tiago M.
dc.contributor.authorMonteiro, A.M.
dc.contributor.authorLopes, Vitor P.
dc.contributor.authorMagalhães, Pedro
dc.date.accessioned2019-01-11T16:47:59Z
dc.date.available2019-01-11T16:47:59Z
dc.date.issued2001
dc.description.abstractThe purpose of this research was to compare the maximal voluntary isometric force (MVIF), the electromyographic activity (EMG) and the muscle thickness between pre-pubertal boys and girls. The sample comprises 27children (12 boys and 15 girls) with 9.5W.52 years old. The M V F and the EMG signal were acquired when the subjects made a single exercise of arm curl and triceps press. To evaluate the MVIF was used a dynamometer (TSD121C from Biopac Systems Znc.). During the arm curl exercise, one surface electrode (TSD 150A from Biopac Systems Znc.) was attached in each biceps. During the triceps press, one surface electrode was attached to the vastus lateralis and other to the vastus medialis of the each triceps. Ground electrode was attached to the elbow. The EMG signals were amplified by a differential amplifier with 2MW, a gain of 1000 and a bandwidth between 15-450Hz. The EMG signals were full-wave rectified and smoothed, allowing to determinate the integral of the EMG signal (iEMG). The iEMG was relativized according to the duration of the contraction. The muscle thickness of the biceps and of the triceps of both arms were measured by B-mode ultrasonography, using real-time electronic scanner with 7.5MHz scanning head (Ecocamera Aloca SSD-500). For comparison of those variables between gender was used the ANOVA factorial and Scheffe as post-hoc test (p< 0.05). There was no significant differences on the MVIF between boys and girls doing the arm curl exercise F(1; 25)=4.128, p=0.0529] or the triceps press exercise F(1; 25)=0.003, p=0.9554]. In the same way, there were no significant differences according to gender on the thickness of the triceps of the left arm F(1; 25)= 0.075, p=0.7859] of the triceps of the right arm F(1;25)=0.925, p=0.3454] of the bicep sof the left arm F(1;25)=0.257, p=0.6166] and of the biceps of the right arm F(1; 25)= 0.016, p=0.8989]. The EMG parameters also didn't present significant differences according to gender for the vastus lateralis of both arms, for the vastus medialis of both arms and for the biceps of the right and of the left arm. Therefore, we might conclude that apparently there are no significant differences on the muscle morphology, electromyographic activity and force production between pre-pubertal boys and girls.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBarbosa, Tiago M.; Monteiro, A.M.; Lopes, Vítor P.; Magalhães, Pedro M. (2001). Comparison of muscle morphology, electromyographic activity and force production between prepubertal boys and girls. In 21st Symposium of the European group of pediatric work physiology "Exercise and physical (in)activity in children with focus on the girl". Corsendonk Priorypt_PT
dc.identifier.urihttp://hdl.handle.net/10198/18429
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherHuman Kineticspt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectMuscle thicknesspt_PT
dc.titleComparison of muscle morphology, electromyographic activity and force production between prepubertal boys and girlspt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceCorsendonk Priorypt_PT
oaire.citation.endPage329pt_PT
oaire.citation.issue13pt_PT
oaire.citation.startPage329pt_PT
oaire.citation.title21st Symposium of the European group of pediatric work physiology "Exercise and physical (in)activity in children with focus on the girl"pt_PT
oaire.citation.volume3pt_PT
person.familyNameBarbosa
person.familyNameMonteiro
person.familyNameLopes
person.familyNameMagalhães
person.givenNameTiago M.
person.givenNameAntónio M.
person.givenNameVitor P.
person.givenNamePedro
person.identifier2316939
person.identifier.ciencia-id8B11-BDC4-F6FF
person.identifier.ciencia-idC41C-6CCD-A1F0
person.identifier.ciencia-id531D-60D6-48BF
person.identifier.ciencia-id631D-E634-0FBB
person.identifier.orcid0000-0001-7071-2116
person.identifier.orcid0000-0003-4467-1722
person.identifier.orcid0000-0003-1599-2180
person.identifier.orcid0000-0003-2492-1499
person.identifier.ridD-1774-2011
person.identifier.scopus-author-id10044856400
person.identifier.scopus-author-id17435197500
person.identifier.scopus-author-id35224896200
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication941a6f14-cfba-458a-a2e3-0cbd1846cd42
relation.isAuthorOfPublication5b5d8601-e683-42d5-a1b5-c8e29a4e0a41
relation.isAuthorOfPublication9551b011-136c-42ca-a626-f0cedfbd0814
relation.isAuthorOfPublicationce33c577-a21a-4f32-9443-ea36d0af8d72
relation.isAuthorOfPublication.latestForDiscovery9551b011-136c-42ca-a626-f0cedfbd0814

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