Publication
Hydrodynamic proļ¬le of young swimmers: changes over a competitive season
| dc.contributor.author | Barbosa, Tiago M. | |
| dc.contributor.author | Morais, J.E. | |
| dc.contributor.author | Marques, MƔrio C. | |
| dc.contributor.author | Silva, A.J. | |
| dc.contributor.author | Marinho, D.A. | |
| dc.contributor.author | Kee, Ying Hwa | |
| dc.date.accessioned | 2014-08-20T13:13:26Z | |
| dc.date.available | 2014-08-20T13:13:26Z | |
| dc.date.issued | 2015 | |
| dc.description.abstract | The aim of this study was to analyze the changes in the hydrodynamic proļ¬le of young swimmers over a competitive season and to compare the variations according to a well-designed training periodization. Twenty-ļ¬ve swimmers (13 boys and 12 girls) were evaluated in (a) October (M1); (b) March (M2); and (c) June (M3). Inertial and anthropometrical measures included body mass, swimmerās added water mass, height, and trunk transverse surface area. Swimming efļ¬ciency was estimated by the speed ļ¬uctuation, stroke index, and approximate entropy. Active drag was estimated with the velocity perturbation method and the passive drag with the gliding decay method. Hydrodynamic dimen- sionless numbers (Froude and Reynolds numbers) and hull velocity (i.e., speed at Froude number = 0.42) were also calculated. No variable presented a signiļ¬cant gender effect. Anthropometrics and inertial parameters plus dimensionless numbers increased over time. Swimming efļ¬ciency improved between M1 and M3. There was a trend for both passive and active drag increase from M1 to M2, but being lower at M3 than at M1. Intra-individual changes between evaluation moments suggest high between- and within-subject variations. Therefore, hydrodynamic changes over a season occur in a non-linear fashion way, where the interplay between growth and training periodization explain the unique path ļ¬ow selected by each young swimmer. | por |
| dc.identifier.citation | Barbosa, Tiago M.; Morais, J.E.; Marques, M.C.; Silva, A.J.; Marinho, D.A.; Kee, Y.H. (2014). Hydrodynamic proļ¬le of young swimmers: changes over a competitive season. Scandinavian Journal of Medicine and Science in Sports. ISSN 0905-7188. 25, p. e184āe196 | por |
| dc.identifier.doi | 10.1111/sms.12281 | |
| dc.identifier.issn | 0905-7188 | |
| dc.identifier.uri | http://hdl.handle.net/10198/10170 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | John Wiley & Sons | por |
| dc.subject | Young swimmers | por |
| dc.title | Hydrodynamic proļ¬le of young swimmers: changes over a competitive season | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.title | Scandinavian Journal of Medicine and Science in Sports | por |
| person.familyName | Barbosa | |
| person.familyName | Morais | |
| person.givenName | Tiago M. | |
| person.givenName | J. E. | |
| person.identifier | 867179 | |
| person.identifier.ciencia-id | 8B11-BDC4-F6FF | |
| person.identifier.ciencia-id | AA12-BF58-EE60 | |
| person.identifier.orcid | 0000-0001-7071-2116 | |
| person.identifier.orcid | 0000-0002-6885-0648 | |
| person.identifier.scopus-author-id | 10044856400 | |
| rcaap.rights | openAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | 941a6f14-cfba-458a-a2e3-0cbd1846cd42 | |
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| relation.isAuthorOfPublication.latestForDiscovery | 941a6f14-cfba-458a-a2e3-0cbd1846cd42 |