title: Cardiorespiratory responses and prediction of peak oxygen uptake during the shuttle walking test in healthy sedentary adult men.
abstract: BACKGROUND
  The application of the Shuttle Walking Test (SWT) to assess cardiorespiratory fitness and the intensity of this test in healthy participants has rarely been studied. This study aimed to assess and correlate the cardiorespiratory responses of the SWT with the cardiopulmonary exercise testing (CEPT) and to develop a regression equation for the prediction of peak oxygen uptake (VO2 peak) in healthy sedentary adult men.
  
  
  METHODS
  In the first stage of this study, 12 participants underwent the SWT and the CEPT on a treadmill. In the second stage, 53 participants underwent the SWT twice. In both phases, the VO2 peak, respiratory exchange ratio (R), and heart rate (HR) were evaluated.
  
  
  RESULTS
  Similar results in VO2 peak (P>0.05), R peak (P>0.05) and predicted maximum HR (P>0.05) were obtained between the SWT and CEPT. Both tests showed strong and significant correlations of VO2 peak (r = 0.704, P = 0.01) and R peak (r = 0.737, P<0.01), as well as the agreement of these measurements by Bland-Altman analysis. Body mass index and gait speed were the variables that explained 40.6% (R2 = 0.406, P = 0.001) of the variance in VO2 peak. The results obtained by the equation were compared with the values obtained by the gas analyzer and no significant difference between them (P>0.05) was found.
  
  
  CONCLUSIONS
  The SWT produced maximal cardiorespiratory responses comparable to the CEPT, and the developed equation showed viability for the prediction of VO2 peak in healthy sedentary men.
authors: Universidade Federal dos Vales do Jequitinhonha e Mucuri, Programa Multicêntrico de Pós- Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia, Diamantina, Minas Gerais, Brazil; Universidade Federal dos Vales do Jequitinhonha e Mucuri, Laboratório de Inflamação e Metabolismo, Diamantina, Minas Gerais, Brazil.
authors: Camila D C
authors: CD
authors: Neves
authors: Universidade Federal dos Vales do Jequitinhonha e Mucuri, Programa Multicêntrico de Pós- Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia, Diamantina, Minas Gerais, Brazil.
authors: Ana Cristina Rodrigues
authors: AC
authors: Lacerda
authors: Universidade Federal dos Vales do Jequitinhonha e Mucuri, Laboratório de Inflamação e Metabolismo, Diamantina, Minas Gerais, Brazil.
authors: Vanessa K S
authors: VK
authors: Lage
authors: Universidade Federal dos Vales do Jequitinhonha e Mucuri, Laboratório de Inflamação e Metabolismo, Diamantina, Minas Gerais, Brazil.
authors: Liliana P
authors: LP
authors: Lima
authors: Universidade Federal dos Vales do Jequitinhonha e Mucuri, Programa Multicêntrico de Pós- Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia, Diamantina, Minas Gerais, Brazil.
authors: Sueli F
authors: SF
authors: Fonseca
authors: Universidade Federal de Santa Catarina, Departamento de Fisioterapia, Araranguá, Santa Catarina, Brazil.
authors: Núbia C P
authors: NC
authors: de Avelar
authors: Universidade Federal de Minas Gerais, Laboratório de Imunofarmacologia, Belo Horizonte, Minas Gerais, Brazil.
authors: Mauro M
authors: MM
authors: Teixeira
authors: Universidade Federal dos Vales do Jequitinhonha e Mucuri, Programa Multicêntrico de Pós- Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia, Diamantina, Minas Gerais, Brazil; Universidade Federal dos Vales do Jequitinhonha e Mucuri, Laboratório de Inflamação e Metabolismo, Diamantina, Minas Gerais, Brazil.
authors: Vanessa A
authors: VA
authors: Mendonça
mesh_terms: D000293:Adolescent; D000328:Adult; D006321:Heart / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000378:metabolism*; D015657:Respiratory Transport / Q000502:physiology*; D016138:Walking / Q000502:physiology*
chemical_list: D010100:Oxygen