Biblioteca Digital do Instituto Politécnico de Bragança   Instituto Politécnico de Bragança

Biblioteca Digital do IPB >
Escola Superior de Educação >
Departamento de Ciências do Desporto e Educação Física >
DCDEF - Artigos em Revistas Indexados ao ISI >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10198/4086

Título: Energy cost and intracyclic variation of the velocity of the centre of mass in butterfly stroke
Autor: Barbosa, Tiago M.
Keskinen, K.L.
Fernandes, R.J.
Colaço, P.
Lima, A.B.
Vilas-Boas, J.P.
Palavras-chave: Butterfly
Centre of mass
Energy cost
Velocity fluctuation
Issue Date: 2005
Editora: Springer
Citação: Barbosa, Tiago M.; Keskinen, K.L.; Fernandes, R.J.; Colaço, P.; Lima, A.B.; Vilas-Boas, J.P. (2005) - Energy cost and intracyclic variation of the velocity of the centre of mass in butterfly stroke. European Journal of Applied Physiology. ISSN 1439-6319. 93:5-6, p. 519-523
Resumo: The purpose of this study was to examine the relationship between the intra-cycle variation of the horizontal velocity of displacement (dV) and the energy cost (EC) in butterfly stroke. Five Portuguese national level swimmers performed one maximal and two submaximal 200-m butterfly swims. The oxygen consumption was measured breath-by-breath by portable metabolic cart. A respiratory snorkel and valve system with low hydrodynamic resistance was used to measure pulmonary ventilation and to collect breathing air samples. Blood samples from the ear lobe were collected before and after each swim to analyse blood lactate concentration. Total energy expenditure (Etot) and EC were calculated for each swim. The swims were videotaped in the sagittal plane with a set of two cameras providing dual projection from both underwater and above the water surface. The APAS system was used to analyse dV for the centre of mass. The Etot increased linearly with the increasing V, presenting a significant correlation coefficient between these parameters (r=0.827, P<0.001). The increase in EC was significantly associated with the increase in the dV (r=0.807, P<0.001). All data were presented as the mean value and the standard deviation. It is concluded that high intra-cycle variation of the velocity of the centre of mass was related to less efficient swimming and vice versa for the butterfly stroke.
Arbitragem científica: yes
URI: http://hdl.handle.net/10198/4086
ISSN: 1439-6319
Versão do Editor: http://www.springerlink.com/content/x67p7c3wgf2q38dx/
Appears in Collections:DCDEF - Artigos em Revistas Indexados ao ISI

Files in This Item:

File Description SizeFormat
Eur J Apll Physiol.pdf261,84 kBAdobe PDFView/Open
Restrict Access. You can request a copy!
Eur J Apll Physiolresumo.pdf157,06 kBAdobe PDFView/Open

Statistics
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpaceOrkut
Formato BibTex mendeley Endnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 


  © Instituto Politécnico de Bragança - Biblioteca Digital - Feedback - Statistics
  Estamos no RCAAP Governo Português separator Ministério da Educação e Ciência   Fundação para a Ciência e a Tecnologia

Financiado por:

POS_C UE