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Indexed by:Journal Papers

Date of Publication:2015-09-01

Journal:SPINAL CORD

Included Journals:SCIE、PubMed、Scopus

Volume:53

Issue:9

Page Number:687-691

ISSN No.:1362-4393

Abstract:Study design: Each participant performed a series of wheelchair exercises equivalent in intensity to minimal functional speed (1 ms(-1)), functional walking speed (1.3 ms(-1)), a relatively challenging speed (1.6 ms(-1)) and a self- selected speed. Each participant also completed a graded exercise test (GXT) to volitional exhaustion (VO2peak).
   Objectives: The purpose of this study was (1) to assess the physical capacity of wheelchair users as they undertake typical mobility activities and (2) to investigate how closely the components of a differentiated model of perceived exertion mirror wheelchair users' own perception of exertion.
   Methods: Eleven (eight males and three females) spinal cord- injured or congenitally impaired wheelchair-dependent participants volunteered for the study. Differentiated ratings of perceived exertion (RPE_arm and RPE_respiration) and oxygen uptake (VO2) and heart rate were recorded during each exercise.
   Results: The mean comfortable speed at which the participants propelled their own wheelchairs on the wheelchair ergometer was 1.1+/-0.2 ms(-1). Speeds of 1ms(-1) and 1.3 ms(-1) are typical of everyday functional propulsion. The corresponding RPE_respiration and RPE_arm ranged from 7 to 13 on the Borg scale; the % VO2peak measured in these trials ranged from 37 to 80% VO2peak. For propulsion intensities used in the present study-low, moderate, high and graded exercise intensity-no difference could be observed between RPE_respiration and RPE_arm. There were no significant differences between RPE_arm and RPE_respiration at the termination of the GXT.
   Conclusion: The current study showed potential for the use of RPE to assess and monitor daily wheelchair propulsion intensity in individuals with paraplegia.