title: Prescription of walking exercise intensity from the incremental shuttle walk test in people with chronic obstructive pulmonary disease.
abstract: OBJECTIVE
  This study determined the intensity of walking exercise prescribed from 70% of peak speed achieved during the incremental shuttle walk test (ISWT) in people with chronic obstructive pulmonary disease and whether a steady-state response was achieved when exercising at this intensity.
  
  
  METHODS
  Each participant performed lung function tests, an incremental cycle test, two ISWTs, and a 10-min continuous walking exercise at 70% peak ISWT speed. Oxygen consumption (V(O2)) was collected using a portable system (Cosmed K4b(2), Rome, Italy). The V(O2) from the 10-min walking exercise was compared with V(O2)peak from the better ISWT as a measure of walking exercise intensity.
  
  
  RESULTS
  Thirty-four participants completed the study. The mean intensity achieved during the 10-min walking exercise was 76% (11%) V(O2)peak. Steady-state V(O2) was achieved by minute 5 in the 10-min walking exercise.
  
  
  CONCLUSIONS
  Prescription of walking exercise at 70% of the peak ISWT speed provided an intensity appropriate for achieving physiologic training responses.
authors.affiliation: Discipline of Physiotherapy, Faculty of Health Sciences, The University of Sydney, Australia.
authors.forename: Rahizan
authors.initials: R
authors.lastname: Zainuldin
authors.forename: Martin G
authors.initials: MG
authors.lastname: Mackey
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Alison
mesh_terms: D000368:Aged; D004417:Dyspnea / Q000503:physiopathology; D005080:Exercise Test; D017079:Exercise Tolerance / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D018763:Muscle Fatigue / Q000502:physiology; D010101:Oxygen Consumption / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology; D029424:Pulmonary Disease, Chronic Obstructive / Q000503:physiopathology / Q000534:rehabilitation*; D016138:Walking / Q000502:physiology*