Characterization of speed fluctuation and drag force in young swimmers: a gender comparison.
Main Author: | |
---|---|
Publication Date: | 2013 |
Other Authors: | , , , , , , |
Format: | Article |
Language: | eng |
Source: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Download full: | http://hdl.handle.net/10314/3289 |
Summary: | The aim of this study was to compare the speed fluctuation and the drag force in young swimmers between genders. Twenty-three young pubertal swimmers (12 boys and 11 girls) volunteered as subjects. Speed fluctuation was measured using a kinematical mechanical method (i.e., speedo-meter) during a maximal 25-m front crawl bout. Active drag, active drag coefficient and power needed to overcome drag were measured with the velocity perturbation method for another two maximal 25m front crawl bouts with and without the perturbation device. Passive drag and the passive drag coefficient were estimated using the gliding decay velocity method after a maximal push-off from the wall while being fully immersed. The technique drag index was also assessed as a ratio between active and passive drag. Boys presented meaningfully higher speed fluctuation, active drag, power needed to overcome drag and technique drag index than the girls. There were no significant gender differences for active drag coefficient, passive drag and passive drag coefficient. There were positive and moderate-strong associations between active drag and speed fluctuation when controlling the effects of swim velocity. So, increasing speed fluctuation leads to higher drag force values and those are even higher for boys than for girls. |
id |
RCAP_adc1533d7e04e2ca79c1cf4f9dc0c943 |
---|---|
oai_identifier_str |
oai:bdigital.ipg.pt:10314/3289 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Characterization of speed fluctuation and drag force in young swimmers: a gender comparison.The aim of this study was to compare the speed fluctuation and the drag force in young swimmers between genders. Twenty-three young pubertal swimmers (12 boys and 11 girls) volunteered as subjects. Speed fluctuation was measured using a kinematical mechanical method (i.e., speedo-meter) during a maximal 25-m front crawl bout. Active drag, active drag coefficient and power needed to overcome drag were measured with the velocity perturbation method for another two maximal 25m front crawl bouts with and without the perturbation device. Passive drag and the passive drag coefficient were estimated using the gliding decay velocity method after a maximal push-off from the wall while being fully immersed. The technique drag index was also assessed as a ratio between active and passive drag. Boys presented meaningfully higher speed fluctuation, active drag, power needed to overcome drag and technique drag index than the girls. There were no significant gender differences for active drag coefficient, passive drag and passive drag coefficient. There were positive and moderate-strong associations between active drag and speed fluctuation when controlling the effects of swim velocity. So, increasing speed fluctuation leads to higher drag force values and those are even higher for boys than for girls.Elsevier2016-11-19T20:48:19Z2016-11-192013-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10314/3289http://hdl.handle.net/10314/3289engBARBOSA TM, COSTA MJ, MORAIS JE, MOROUÇO P, MOREIRA MF, GARRIDO ND, MARINHO DA, SILVA AJ (2013) Characterization of speed fluctuation and drag force in young swimmers: a gender comparison. Human Movement Science, 32(6): 1214-1225.Barbosa, TiagoCosta, MárioMorais, JorgeMorouço, PedroMoreira, MarcGarrido, NunoMarinho, DanielSilva, Antónioinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-14T02:56:43Zoai:bdigital.ipg.pt:10314/3289Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:42:37.492259Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Characterization of speed fluctuation and drag force in young swimmers: a gender comparison. |
title |
Characterization of speed fluctuation and drag force in young swimmers: a gender comparison. |
spellingShingle |
Characterization of speed fluctuation and drag force in young swimmers: a gender comparison. Barbosa, Tiago |
title_short |
Characterization of speed fluctuation and drag force in young swimmers: a gender comparison. |
title_full |
Characterization of speed fluctuation and drag force in young swimmers: a gender comparison. |
title_fullStr |
Characterization of speed fluctuation and drag force in young swimmers: a gender comparison. |
title_full_unstemmed |
Characterization of speed fluctuation and drag force in young swimmers: a gender comparison. |
title_sort |
Characterization of speed fluctuation and drag force in young swimmers: a gender comparison. |
author |
Barbosa, Tiago |
author_facet |
Barbosa, Tiago Costa, Mário Morais, Jorge Morouço, Pedro Moreira, Marc Garrido, Nuno Marinho, Daniel Silva, António |
author_role |
author |
author2 |
Costa, Mário Morais, Jorge Morouço, Pedro Moreira, Marc Garrido, Nuno Marinho, Daniel Silva, António |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Barbosa, Tiago Costa, Mário Morais, Jorge Morouço, Pedro Moreira, Marc Garrido, Nuno Marinho, Daniel Silva, António |
description |
The aim of this study was to compare the speed fluctuation and the drag force in young swimmers between genders. Twenty-three young pubertal swimmers (12 boys and 11 girls) volunteered as subjects. Speed fluctuation was measured using a kinematical mechanical method (i.e., speedo-meter) during a maximal 25-m front crawl bout. Active drag, active drag coefficient and power needed to overcome drag were measured with the velocity perturbation method for another two maximal 25m front crawl bouts with and without the perturbation device. Passive drag and the passive drag coefficient were estimated using the gliding decay velocity method after a maximal push-off from the wall while being fully immersed. The technique drag index was also assessed as a ratio between active and passive drag. Boys presented meaningfully higher speed fluctuation, active drag, power needed to overcome drag and technique drag index than the girls. There were no significant gender differences for active drag coefficient, passive drag and passive drag coefficient. There were positive and moderate-strong associations between active drag and speed fluctuation when controlling the effects of swim velocity. So, increasing speed fluctuation leads to higher drag force values and those are even higher for boys than for girls. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-01-01T00:00:00Z 2016-11-19T20:48:19Z 2016-11-19 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10314/3289 http://hdl.handle.net/10314/3289 |
url |
http://hdl.handle.net/10314/3289 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
BARBOSA TM, COSTA MJ, MORAIS JE, MOROUÇO P, MOREIRA MF, GARRIDO ND, MARINHO DA, SILVA AJ (2013) Characterization of speed fluctuation and drag force in young swimmers: a gender comparison. Human Movement Science, 32(6): 1214-1225. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
_version_ |
1799136919149346816 |