title: Metabolic equivalent of exercise stress test explained by six-minute walk test in post coronary artery bypass graft and post percutaneous coronary intervention patients.
abstract: OBJECTIVE
  To investigate the relationship among metabolic equivalents of an exercise stress test (METs of EST), demographic parameters (age, body weight, height, BMI), peak oxygen consumption (VO(2) peak), and six-minute walk distances (6MWD) determined from a six-minute walk test (6MWT).
  
  
  METHODS
  Exercise capacity was estimated by a 6MWT and EST at the sixth week post operation in post coronary artery bypass graft (post CABG n = 17) and post percutaneous coronary intervention (post PCI, n = 13)patients.
  
  
  RESULTS
  METs of EST showed: high correlation (p<O.01) with VO(2) peak of 6MWT (r = 0.94), 6MWD (r = 0.92); muscle strength (r = 0.78), moderate correlation (p<0.01) with height (r = 0.53); negative correlation with age (r = -0.50). Low correlation was found (p<O. 05) with step length (r = 0.43), and weight (r = 0.38). No correlation was found among METs of EST and rating perceived exertion (RPE) of EST and 6MWT. The multiple linear regression equation for explaining METs of EST is as follows: METs of EST = -2.94+0.02 (6MWD), (r = 0.923, R2 = 0.85, p<0.001).
  
  
  CONCLUSIONS
  The 6MWT may possibly be used as an alternative choice for estimating energy expenditure to design exercise programs for these post operation groups.
authors.forename: Watesinee
authors.initials: W
authors.lastname: Khuangsirikul
authors.forename: Wattana
authors.initials: W
authors.lastname: Jalayondeja
authors.forename: Rungchai
authors.initials: R
authors.lastname: Chuanchaiyakul
authors.forename: Rungroj
authors.initials: R
authors.lastname: Krittayaphong
authors.forename: Chunhakasem
authors.initials: C
authors.lastname: Chotinaiwattarakul
authors.forename: Pansak
authors.initials: P
authors.lastname: Laksanabunsong
mesh_terms: D001837:Body Weights and Measures; D001026:Coronary Artery Bypass; D005080:Exercise Test; D006801:Humans; D055686:Metabolic Equivalent / Q000502:physiology*; D008875:Middle Aged; D010101:Oxygen Consumption / Q000502:physiology*; D062645:Percutaneous Coronary Intervention; D016138:Walking / Q000502:physiology*