title: Reproducibility of exercise tolerance in patients with end-stage renal disease.
abstract: OBJECTIVE
  To determine the interday reproducibility of peak and submaximal exercise tolerance of patients with end-stage renal disease (ESRD).
  
  
  METHODS
  Repeated measures.
  
  
  METHODS
  Day-patient rehabilitation center.
  
  
  METHODS
  Twelve consecutively presenting, self-selected patients with ESRD.
  
  
  METHODS
  All patients performed peak exercise tolerance assessments on a cycle ergometer up to the point of volitional fatigue, with a 1-week interval between the 2 tests.
  
  
  METHODS
  Cardiopulmonary, hemodynamic, and physical performance parameters were assessed at peak exercise and at the lactate threshold. Standard error of measurement, percentage coefficient of variation (CV%), intraclass correlation coefficient (ICC), and limits of agreement (LOA) were calculated to determine the reproducibility of all variables.
  
  
  RESULTS
  CV% (range, 5%-7%) and ICCs (range, .94 - .98) for oxygen uptake and heart rate at peak exercise and lactate threshold indicated highly acceptable levels of group mean reproducibility. LOA analysis revealed satisfactory levels of reproducibility for individual patients.
  
  
  CONCLUSIONS
  Taken together, these reproducibility data may be applied to clinical work, requiring the quantification of changes in the exercise tolerance of patients with ESRD after short-term interventions (eg, exercise training, therapeutic use of recombinant erythropoietin).
authors.affiliation: Neuromuscular Biology Research Group, Manchester Metropolitan University, Alsager, Cheshire, UK.
authors.forename: P
authors.initials: P
authors.lastname: Koufaki
authors.forename: P F
authors.initials: PF
authors.lastname: Naish
authors.forename: T H
authors.initials: TH
authors.lastname: Mercer
mesh_terms: D017079:Exercise Tolerance; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged