Effect of weighted sled towing on sprinting effectiveness, power and force-velocity relationship
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/185895 |
Resumo: | This study aimed to compare the components of force-velocity (F-V) and power-velocity (P- V) profiles and the mechanical effectiveness of force application (or force ratio–RF) among various sled-towing loads during the entire acceleration phase of a weighted sled sprint. Eighteen sprinters performed four 50-m sprints in various conditions: unloaded; with a load corresponding to 20% of the athlete’s body mass (BM); with a load of 30% BM; and with a load of 40% BM. Data were collected with five video cameras, and the images were digitised to obtain velocity from the derivation of the centre-of-mass position. F-V and P-V compo- nents and RF were estimated from sprinting velocity-time data for each load using a vali- dated method that is based on an inverse dynamic approach applied to the sprinter’s centre- of-mass (it models the horizontal antero-posterior and vertical ground reaction force compo- nents) and requires only measurement of anthropometric and spatiotemporal variables (body mass, stature and instantaneous position or velocity during the acceleration phase). The theoretical maximal velocity decreased with load compared with the unloaded condition (for 20% BM: -6%, effect size (ES) = 0,38; for 30% BM: -15%, ES = 1.02; for 40% BM: -18%, ES = 1.10). The theoretical maximal horizontal force (F0) and maximal power were not dif- ferent among conditions. However, power at the end of the acceleration phase increased with load (40% BM vs 0%: 72%; ES = 2.73) as well as the maximal mechanical effectiveness (12%; ES = 0.85). The linear decrease in RF was different between 30 or 40% BM and the unloaded condition (-23%; ES = 0.74 and 0.66). Better effectiveness may be developed with 40% BM load at the beginning of the acceleration and with the various load-induced changes in the components of the F-V and P-V relationships, allowing a more accurate determination of optimal loading conditions for maximizing power. |
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Pantoja, Patrícia DiasCarvalho, Alberito Rodrigo deRibas, Leonardo RossatoPeyré-Tartaruga, Leonardo Alexandre2018-12-05T02:44:01Z20181932-6203http://hdl.handle.net/10183/185895001080459This study aimed to compare the components of force-velocity (F-V) and power-velocity (P- V) profiles and the mechanical effectiveness of force application (or force ratio–RF) among various sled-towing loads during the entire acceleration phase of a weighted sled sprint. Eighteen sprinters performed four 50-m sprints in various conditions: unloaded; with a load corresponding to 20% of the athlete’s body mass (BM); with a load of 30% BM; and with a load of 40% BM. Data were collected with five video cameras, and the images were digitised to obtain velocity from the derivation of the centre-of-mass position. F-V and P-V compo- nents and RF were estimated from sprinting velocity-time data for each load using a vali- dated method that is based on an inverse dynamic approach applied to the sprinter’s centre- of-mass (it models the horizontal antero-posterior and vertical ground reaction force compo- nents) and requires only measurement of anthropometric and spatiotemporal variables (body mass, stature and instantaneous position or velocity during the acceleration phase). The theoretical maximal velocity decreased with load compared with the unloaded condition (for 20% BM: -6%, effect size (ES) = 0,38; for 30% BM: -15%, ES = 1.02; for 40% BM: -18%, ES = 1.10). The theoretical maximal horizontal force (F0) and maximal power were not dif- ferent among conditions. However, power at the end of the acceleration phase increased with load (40% BM vs 0%: 72%; ES = 2.73) as well as the maximal mechanical effectiveness (12%; ES = 0.85). The linear decrease in RF was different between 30 or 40% BM and the unloaded condition (-23%; ES = 0.74 and 0.66). Better effectiveness may be developed with 40% BM load at the beginning of the acceleration and with the various load-induced changes in the components of the F-V and P-V relationships, allowing a more accurate determination of optimal loading conditions for maximizing power.application/pdfengPlos One. San Francisco. Vol. 13, no. 10 (Oct. 2018), e0204473, 12 p.CorridaDesempenho atléticoAtletasEffect of weighted sled towing on sprinting effectiveness, power and force-velocity relationshipEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001080459.pdf.txt001080459.pdf.txtExtracted Texttext/plain43439http://www.lume.ufrgs.br/bitstream/10183/185895/2/001080459.pdf.txt3310279a830cb04946c809e32a2f933dMD52ORIGINAL001080459.pdfTexto completo (inglês)application/pdf907668http://www.lume.ufrgs.br/bitstream/10183/185895/1/001080459.pdf0bd523ced5b7a1cd43e77be6aa57302eMD5110183/1858952023-09-23 03:37:13.709191oai:www.lume.ufrgs.br:10183/185895Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-09-23T06:37:13Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Effect of weighted sled towing on sprinting effectiveness, power and force-velocity relationship |
title |
Effect of weighted sled towing on sprinting effectiveness, power and force-velocity relationship |
spellingShingle |
Effect of weighted sled towing on sprinting effectiveness, power and force-velocity relationship Pantoja, Patrícia Dias Corrida Desempenho atlético Atletas |
title_short |
Effect of weighted sled towing on sprinting effectiveness, power and force-velocity relationship |
title_full |
Effect of weighted sled towing on sprinting effectiveness, power and force-velocity relationship |
title_fullStr |
Effect of weighted sled towing on sprinting effectiveness, power and force-velocity relationship |
title_full_unstemmed |
Effect of weighted sled towing on sprinting effectiveness, power and force-velocity relationship |
title_sort |
Effect of weighted sled towing on sprinting effectiveness, power and force-velocity relationship |
author |
Pantoja, Patrícia Dias |
author_facet |
Pantoja, Patrícia Dias Carvalho, Alberito Rodrigo de Ribas, Leonardo Rossato Peyré-Tartaruga, Leonardo Alexandre |
author_role |
author |
author2 |
Carvalho, Alberito Rodrigo de Ribas, Leonardo Rossato Peyré-Tartaruga, Leonardo Alexandre |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Pantoja, Patrícia Dias Carvalho, Alberito Rodrigo de Ribas, Leonardo Rossato Peyré-Tartaruga, Leonardo Alexandre |
dc.subject.por.fl_str_mv |
Corrida Desempenho atlético Atletas |
topic |
Corrida Desempenho atlético Atletas |
description |
This study aimed to compare the components of force-velocity (F-V) and power-velocity (P- V) profiles and the mechanical effectiveness of force application (or force ratio–RF) among various sled-towing loads during the entire acceleration phase of a weighted sled sprint. Eighteen sprinters performed four 50-m sprints in various conditions: unloaded; with a load corresponding to 20% of the athlete’s body mass (BM); with a load of 30% BM; and with a load of 40% BM. Data were collected with five video cameras, and the images were digitised to obtain velocity from the derivation of the centre-of-mass position. F-V and P-V compo- nents and RF were estimated from sprinting velocity-time data for each load using a vali- dated method that is based on an inverse dynamic approach applied to the sprinter’s centre- of-mass (it models the horizontal antero-posterior and vertical ground reaction force compo- nents) and requires only measurement of anthropometric and spatiotemporal variables (body mass, stature and instantaneous position or velocity during the acceleration phase). The theoretical maximal velocity decreased with load compared with the unloaded condition (for 20% BM: -6%, effect size (ES) = 0,38; for 30% BM: -15%, ES = 1.02; for 40% BM: -18%, ES = 1.10). The theoretical maximal horizontal force (F0) and maximal power were not dif- ferent among conditions. However, power at the end of the acceleration phase increased with load (40% BM vs 0%: 72%; ES = 2.73) as well as the maximal mechanical effectiveness (12%; ES = 0.85). The linear decrease in RF was different between 30 or 40% BM and the unloaded condition (-23%; ES = 0.74 and 0.66). Better effectiveness may be developed with 40% BM load at the beginning of the acceleration and with the various load-induced changes in the components of the F-V and P-V relationships, allowing a more accurate determination of optimal loading conditions for maximizing power. |
publishDate |
2018 |
dc.date.accessioned.fl_str_mv |
2018-12-05T02:44:01Z |
dc.date.issued.fl_str_mv |
2018 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/185895 |
dc.identifier.issn.pt_BR.fl_str_mv |
1932-6203 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001080459 |
identifier_str_mv |
1932-6203 001080459 |
url |
http://hdl.handle.net/10183/185895 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Plos One. San Francisco. Vol. 13, no. 10 (Oct. 2018), e0204473, 12 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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