Logo do repositório
 
Publicação

Kinematical constrictions during Breaststroke swimming with a portable gas analyzer snorkel

2009Artigo científico Acesso embargado
Ver registo simples
dc.contributor.authorReis, V.
dc.contributor.authorSilva, A.
dc.contributor.authorBarbosa, T.
dc.contributor.authorBrito, J.
dc.contributor.authorReis, A.
dc.contributor.authorLouro, Hugo
dc.contributor.authorConceição, A.
dc.date.accessioned2026-02-12T11:24:37Z
dc.date.available2026-02-12T11:24:37Z
dc.date.issued2009
dc.description.abstractOBJECTIVE: To determine the kinematical constrictions in maximal breaststroke swimming bouts with the AquaTrainer snorkel (Cosmed, Rome, Italy). METHODS: Seven national level breaststrokers performed two maximal bouts of 100-m swims (separated by 48 hours): (i) one bout connected to the AquaTrainer snorkel (constricted swim); (ii) one bout without the snorkel (free swim). The swims were videotaped in sagittal plane with a pair of cameras providing a dual projection from both above and underwater. The study comprised kinematical analysis of stroke cycles using APAS and a VCR (f = 50 Hz). To create a single dual projection image, the independent digitalization from both cameras was reconstructed with the help of a calibration volume and a 0.01). The 2D-DLT algorithm. Digitalization reliability was high (ICC=0.97 following measures were assessed: (i) swimming performance (T100); (ii) stroke parameters (stroke cycle period, stroke rate, stroke length and mean swimming velocity); (iii) estimated swimming efficiency by the swimming index; (iv) speed fluctuation (dv) and the mathematical characterization of dv. Mean dv curves normalized to time were computed with MATLAB. The polynomial regression (7th power) between dv and normalized duration of the full stroke cycle was calculated. Wilcoxon tests were performed to compare significant differences in the dependent variables (performance, stroke mechanics and efficiency variables) according to the independent variable (free versus constricted swim) (P 0.05). RESULTS: T100 was significantly higher for constricted swimming than in free condition (6.26%; Z=-2.366; P=0.02). The remaining variables showed no significant differences between the two swimming conditions. In both exercise conditions, dv was characterized by a bi-modal profile. The determination coefficients for the dv mathematical model were significant (P<0,01) and 0,47. DISCUSSION & CONCLUSION: None of the stroke mechanics and efficiency variables evaluated presented significant differences between both swimming conditions. The AquaTrainer constrictions might be related mainly to the start and turn phases. (Supported by FCT grant: POCI/DES/58362/2004)pt_PT
dc.description.sponsorshipThis investigation was supported by grants of FCT (POCI/DES/58362/2004). All the experiments herein comply with the current laws of the country in which they were performed.
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.issn1303-2968
dc.identifier.urihttp://hdl.handle.net/10400.15/5996
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationEuropeans for Fair Trade
dc.rights.uriN/A
dc.subjectKinematical constrictionspt_PT
dc.subjectSwimming performancept_PT
dc.subjectStroke parameterspt_PT
dc.subjectAquaTrainer snorkelpt_PT
dc.subjectBreakstrokept_PT
dc.titleKinematical constrictions during Breaststroke swimming with a portable gas analyzer snorkelpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumber2016-1-PL01-KA219-026466
oaire.awardTitleEuropeans for Fair Trade
oaire.awardURIhttp://hdl.handle.net/10400.15/5995
oaire.fundingStreamStrategic Partnerships for Schools Only
oaire.versionhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43
person.familyNameLouro
person.givenNameHugo
person.identifier1741645
person.identifier.ciencia-id8019-E11F-9609
person.identifier.orcid0000-0001-5635-2476
person.identifier.scopus-author-id26425142800
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationf29a2faa-09b7-43c3-b023-0684d0a5d8d3
relation.isAuthorOfPublication.latestForDiscoveryf29a2faa-09b7-43c3-b023-0684d0a5d8d3
relation.isProjectOfPublication986def76-d267-4284-911f-f4cc50f1243d
relation.isProjectOfPublication.latestForDiscovery986def76-d267-4284-911f-f4cc50f1243d

Ficheiros

Principais
A mostrar 1 - 1 de 1
Miniatura indisponível
Nome:
KINEMATICCONSTRAQUATRAINER.pdf
Tamanho:
386.76 KB
Formato:
Adobe Portable Document Format
Ver/Abrir

Coleções

Artigos em revistas internacionais - ESDRM