title: Shuttle walking test in obese women: test-retest reliability and concurrent validity with peak oxygen uptake.
abstract: OBJECTIVE
  The aim of this study was to evaluate the test-retest reliability, concurrent validity and agreement with peak oxygen uptake (VO2 ) obtained during cardiopulmonary exercise testing (CPX) on a treadmill for the incremental shuttle walking test (ISWT) in obese women.
  
  
  METHODS
  Prospective study with a convenient sample of 46 community-dwelling obese women (BMI > 30 kg m(-2) ). The main outcome measures were walking distance on the ISWT and peak VO2 .
  
  
  RESULTS
  Test-retest reliability was good to excellent for the exercise tests (ISWT distance ICC: 0.90; and CPX peak VO2 ICC: 0.90). Peak VO2 obtained during CPX correlated significantly with ISWT distance (r = 0.54, P<0.05) and peak VO2 obtained during the ISWT (r = 0.64, P<0.05). Bland and Altman plots demonstrated a high degree of repeatability.
  
  
  CONCLUSIONS
  The ISWT had excellent reliability as well as good concurrent validity and agreement. The ISWT may be a potential tool for monitoring clinical status and intervention efficacy (e.g. programmes for weight loss and rehabilitative strategies) in this population.
authors.affiliation: Cardiopulmonary Physiotherapy Laboratory, Federal University of Sao Carlos, Sao Carlos, Brazil.
authors.forename: Soraia P
authors.initials: SP
authors.lastname: Jürgensen
authors.forename: Renata
authors.initials: R
authors.lastname: Trimer
authors.forename: Victor Z
authors.initials: VZ
authors.lastname: Dourado
authors.forename: Luciana
authors.initials: L
authors.lastname: Di Thommazo-Luporini
authors.forename: José C
authors.initials: JC
authors.lastname: Bonjorno-Junior
authors.forename: Cláudio R
authors.initials: CR
authors.lastname: Oliveira
authors.forename: Ross
authors.initials: R
authors.lastname: Arena
authors.forename: Renata G
authors.initials: RG
authors.lastname: Mendes
authors.forename: Audrey
authors.initials: A
authors.lastname: Borghi-Silva
mesh_terms: D000293:Adolescent; D000328:Adult; D005080:Exercise Test / Q000379:methods*; D017079:Exercise Tolerance; D005260:Female; D006801:Humans; D008875:Middle Aged; D009765:Obesity / Q000175:diagnosis* / Q000503:physiopathology*; D010101:Oxygen Consumption; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D016138:Walking; D055815:Young Adult
keywords: cardiopulmonary response; metabolic stress; obesity; oxygen uptake; physical capacity; submaximal exercise testing; women