Publication
Cluster stability as a new method to assess changes in performance and its determinant factors over a season in young swimmers
| dc.contributor.author | Morais, J.E. | |
| dc.contributor.author | Silva, A.J. | |
| dc.contributor.author | Marinho, D.A. | |
| dc.contributor.author | Seifert, Ludovic | |
| dc.contributor.author | Barbosa, Tiago M. | |
| dc.date.accessioned | 2015-06-22T15:22:10Z | |
| dc.date.available | 2015-06-22T15:22:10Z | |
| dc.date.issued | 2015 | |
| dc.description.abstract | To apply a new method to identify, classify, and follow up young swimmers based on their performance and its determinant factors over a season and analyze the swimmers' stability over a competitive season with that method. Methods: Fifteen boys and 18 girls (11.8 +/- 0.7 y) part of a national talent-identification scheme were evaluated at 3 different moments of a competitive season. Performance (ie, official 100-m freestyle race time), arm span, chest perimeter, stroke length, swimming velocity, speed fluctuation, coefficient of active drag, propelling efficiency, and stroke index were selected as variables. Hierarchical and k-means cluster analysis were computed. Results: Data suggested a 3-cluster solution, splitting the swimmers according to their performance in all 3 moments. Cluster 1 was related to better performances (talented swimmers), cluster 2 to poor performances (nonproficient swimmers), and cluster 3 to average performance (proficient swimmers) in all moments. Stepwise discriminant analysis revealed that 100%, 94%, and 85% of original groups were correctly classified for the 1st, 2nd, and 3rd evaluation moments, respectively (0.11 <= A <= 0.80; 5.64 <= chi(2) <= 63.40; 0.001 < P <= .68). Membership of clusters was moderately stable over the season (stability range 46.1-75% for the 2 clusters with most subjects). Conclusion.- Cluster stability is a feasible, comprehensive, and informative method to gain insight into changes in performance and its determinant factors in young swimmers. Talented swimmers were characterized by anthropometrics and kinematic features | por |
| dc.description.sponsorship | the Portuguese Science and Technology Foundation (FCT) for the PhD scholarship (SFRH/ BD/76287/2011) | por |
| dc.identifier.citation | Morais, J.E.; Silva, António; Marinho, D.A.; Seifert, Ludovic; Barbosa, Tiago M. (2015). Cluster stability as a new method to assess changes in performance and its determinant factors over a season in young swimmers. International Journal of Sports Physiology and Performance. ISSN 1555-0265. 10:2, p. 261-268 | por |
| dc.identifier.doi | 10.1123/ijspp.2013-0533 | |
| dc.identifier.issn | 1555-0265 | |
| dc.identifier.uri | http://hdl.handle.net/10198/11894 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.subject | Prepubescent swimmers | por |
| dc.subject | Seasonal adaptations | por |
| dc.subject | Longitudinal assessment | por |
| dc.subject | Classification | por |
| dc.title | Cluster stability as a new method to assess changes in performance and its determinant factors over a season in young swimmers | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.title | International Journal of Sports Physiology and Performance | por |
| person.familyName | Morais | |
| person.familyName | Barbosa | |
| person.givenName | J. E. | |
| person.givenName | Tiago M. | |
| person.identifier | 867179 | |
| person.identifier.ciencia-id | AA12-BF58-EE60 | |
| person.identifier.ciencia-id | 8B11-BDC4-F6FF | |
| person.identifier.orcid | 0000-0002-6885-0648 | |
| person.identifier.orcid | 0000-0001-7071-2116 | |
| person.identifier.scopus-author-id | 10044856400 | |
| rcaap.rights | openAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | 80b13e62-254d-4d46-ad90-8b509ab523a8 | |
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| relation.isAuthorOfPublication.latestForDiscovery | 80b13e62-254d-4d46-ad90-8b509ab523a8 |