title: Decreased tidal volume may limit cardiopulmonary performance during exercise in subacute stroke.
abstract: OBJECTIVE
  The aim of this retrospective study was to determine whether pulmonary function was reduced at submaximal and peak exercise in subacute stroke (SG) when compared with sedentary adults (CON).
  
  
  METHODS
  Ten individuals with subacute stroke and 10 sedentary, age- and gender-matched adults performed cardiopulmonary exercise testing (CPET), using a recumbent stepper. We used independent t tests to determine between-group differences at peak effort. We used repeated-measures analysis of variance with Test Minute (minutes 1-6) as the within-subject factor and Group (SG, CON) as the between-subject factor to assess cardiopulmonary submaximal performance.
  
  
  RESULTS
  The SG had significantly lower values (P < .05) for oxygen uptake, minute ventilation ((Equation is included in full-text article.)E), and tidal volume (VT) than CON at peak effort of the CPET. During CPET submaximal effort, we report a significant main effect for Test Minute and Group for VT and respiratory rate but no main effect of Group for (Equation is included in full-text article.)E. To maintain adequate (Equation is included in full-text article.)E during submaximal effort and decreased VT, higher respiratory rate was observed.
  
  
  CONCLUSIONS
  These results suggest that diminished VT in subacute stroke patients may limit performance during submaximal and peak effort of CPET. Rehabilitation professionals should consider methods for improving pulmonary function during stroke rehabilitation.
authors.affiliation: Department of Physical Therapy and Rehabilitation Science, University of Kansas Medical Center, Kansas City, KS (Mr Sisante, Ms Mattlage, and Dr Billinger); Department of Physical Therapy and Integrative Physiology Laboratory, College of Applied Health Sciences, University of Illinois Chicago (Dr Arena); and Department of Neurology, University of Kansas Medical Center, Kansas City (Dr Rippee).
authors.forename: Jason-Flor V
authors.initials: JF
authors.lastname: Sisante
authors.forename: Anna E
authors.initials: AE
authors.lastname: Mattlage
authors.forename: Ross
authors.initials: R
authors.lastname: Arena
authors.forename: Michael A
authors.initials: MA
authors.lastname: Rippee
authors.forename: Sandra A
authors.initials: SA
authors.lastname: Billinger
mesh_terms: D005080:Exercise Test / Q000706:statistics & numerical data*; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology; D012123:Pulmonary Ventilation / Q000502:physiology*; D012129:Respiratory Function Tests / Q000706:statistics & numerical data; D056152:Respiratory Rate / Q000502:physiology; D012189:Retrospective Studies; D057185:Sedentary Behavior; D020521:Stroke / Q000503:physiopathology*; D013990:Tidal Volume / Q000502:physiology