Publicação

Behaviour of the kinematic parameters during a time to exhaustion test at VO2max in elite swimmers

Detalhes bibliográficos
Resumo:	The aim of this study was to analyse, in swimming-pool conditions, the behaviour of the kinematic parameters - stroke rate (SR), stroke length (SL) and stroke index (SI) - during a time to exhaustion test performed at the minimum velocity that elicits maximal oxygen uptake (TLim-v O2max) in elite freestyle swimmers. Eleven swimmers from the National Portuguese Swimming Team (5 male and 6 female) performed an intermittent incremental test for v O2max assessment and an all-out swim at v O2max to determine TLim-v O2max and to analyse the evolution of the kinematic parameters throughout the test. SR increased and SL (and SI) decreased during the TLim-v O2max test, as a general tendency. When the differences in SR, SL and SI between each 12.5% section of the test were tested, a significant increase in SR and a decrease in SL and SI was verified at 25% [(74.00 (25.83 m)], 50% [(148.10 (51.66 m)] and 87.5% [(259.15 (90.41 m)] of the TLim-v O2max duration. These data showed a reduction of the propelling efficiency throughout such a test. These findings could be useful when designing training programmes, namely of middle distance swimmers, taking into consideration maximum aerobic speed, time to exhaustion and propelling efficiency.
Assunto:	Sport, Other social sciences Desporto, Outras ciências sociais
País:	Portugal
Tipo de documento:	journal article
Tipo de acesso:	Restrito
Instituição associada:	Repositório Aberto da Universidade do Porto
Idioma:	inglês
Origem:	Repositório Aberto da Universidade do Porto

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conditionsOfAccess_str	restricted access
contentURL_str_mv	https://repositorio-aberto.up.pt/handle/10216/102237
country_str	PT
description	The aim of this study was to analyse, in swimming-pool conditions, the behaviour of the kinematic parameters - stroke rate (SR), stroke length (SL) and stroke index (SI) - during a time to exhaustion test performed at the minimum velocity that elicits maximal oxygen uptake (TLim-v O2max) in elite freestyle swimmers. Eleven swimmers from the National Portuguese Swimming Team (5 male and 6 female) performed an intermittent incremental test for v O2max assessment and an all-out swim at v O2max to determine TLim-v O2max and to analyse the evolution of the kinematic parameters throughout the test. SR increased and SL (and SI) decreased during the TLim-v O2max test, as a general tendency. When the differences in SR, SL and SI between each 12.5% section of the test were tested, a significant increase in SR and a decrease in SL and SI was verified at 25% [(74.00 (25.83 m)], 50% [(148.10 (51.66 m)] and 87.5% [(259.15 (90.41 m)] of the TLim-v O2max duration. These data showed a reduction of the propelling efficiency throughout such a test. These findings could be useful when designing training programmes, namely of middle distance swimmers, taking into consideration maximum aerobic speed, time to exhaustion and propelling efficiency.
documentTypeURL_str	http://purl.org/coar/resource_type/c_6501
documentType_str	journal article
id	b4f57cc6-20cd-47ae-9d8e-1b4645b85c4e
language	eng
relatedInstitutions_str_mv	Repositório Aberto da Universidade do Porto
resourceName_str	Repositório Aberto da Universidade do Porto
spellingShingle	Behaviour of the kinematic parameters during a time to exhaustion test at VO2max in elite swimmers Sport, Other social sciences Desporto, Outras ciências sociais
title	Behaviour of the kinematic parameters during a time to exhaustion test at VO2max in elite swimmers
topic	Sport, Other social sciences Desporto, Outras ciências sociais