title: Within-day repeatability of the endurance shuttle walk test.
abstract: OBJECTIVE
  To determine the need for a practice walk for the endurance shuttle walk test (ESWT) following the performance of two incremental shuttle walk tests (ISWTs) - one practice and one test - on the same day.
  
  
  METHODS
  Retrospective data analysis of shuttle walk test measurements. All participants had performed two ISWTs and two ESWTs at a single visit, prior to commencing pulmonary rehabilitation.
  
  
  METHODS
  Outpatient physiotherapy department of a university hospital.
  
  
  METHODS
  Forty-four patients (33 males, 11 females) with a primary diagnosis of chronic obstructive pulmonary disease, referred for routine pulmonary rehabilitation.
  
  
  METHODS
  Shuttle walk test distance and time, Borg breathlessness score, heart rate and pulsed oxygen saturation.
  
  
  RESULTS
  The mean age of the group was 67.6 years [standard deviation (SD) 9.0] and mean forced expiratory volume in 1 second was 37% predicted (SD 13). The mean times walked during ESWTs 1 and 2 were 195 and 207 seconds (SD 115 and 138), respectively. Using the analysis recommended by Bland and Altman, the mean of the individual differences (d) between Tests 1 and 2 was 12 seconds, with limits of agreement from -88 to +112 seconds.
  
  
  CONCLUSIONS
  A practice endurance shuttle walk is unnecessary following performance of ISWTs on the same day.
authors.affiliation: Department of Respiratory Medicine, Glenfield Hospital, Leicester LE3 9QP, UK. sue.revill@sfh-tr.nhs.uk
authors.forename: S M
authors.initials: SM
authors.lastname: Revill
authors.forename: J
authors.initials: J
authors.lastname: Williams
authors.forename: L
authors.initials: L
authors.lastname: Sewell
authors.forename: R
authors.initials: R
authors.lastname: Collier
authors.forename: S J
authors.initials: SJ
authors.lastname: Singh
mesh_terms: D000368:Aged; D004417:Dyspnea / Q000503:physiopathology; D005080:Exercise Test; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male; D010100:Oxygen / Q000097:blood; D010807:Physical Endurance / Q000502:physiology*; D029424:Pulmonary Disease, Chronic Obstructive / Q000503:physiopathology* / Q000534:rehabilitation; D015203:Reproducibility of Results; D012189:Retrospective Studies; D016138:Walking / Q000502:physiology*
chemical_list: D010100:Oxygen