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Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion
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Wheelchair users' perceived exertion during typical mobility activities.

L Qi1,2, M Ferguson-Pell2, Z Salimi2

  • 1Department of Biomedical Engineering, Dalian University of Technology, Dalian, Liaoning, China.

Spinal Cord
|March 18, 2015
PubMed
Summary
This summary is machine-generated.

Ratings of perceived exertion (RPE) can effectively monitor wheelchair propulsion intensity in individuals with paraplegia. This study found RPE_arm and RPE_respiration closely mirrored user exertion during various speeds.

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Area of Science:

  • Exercise Physiology
  • Rehabilitation Science
  • Biomedical Engineering

Background:

  • Wheelchair propulsion is a primary mode of mobility for individuals with paraplegia.
  • Assessing the physical demands of wheelchair use is crucial for monitoring health and training.
  • Perceived exertion is a subjective measure of exercise intensity.

Purpose of the Study:

  • To evaluate the physical capacity of wheelchair users during functional mobility tasks.
  • To determine if differentiated ratings of perceived exertion (RPE_arm and RPE_respiration) align with wheelchair users' self-perceived exertion.
  • To assess the relationship between RPE and physiological measures like oxygen uptake (VO2peak) and heart rate.

Main Methods:

  • Eleven wheelchair-dependent participants (spinal cord injury or congenital impairment) performed standardized wheelchair exercises.
  • Exercise intensities included minimal functional speed (1 m/s), functional walking speed (1.3 m/s), a challenging speed (1.6 m/s), and self-selected speed.
  • A graded exercise test (GXT) to volitional exhaustion was conducted, with RPE (arm and respiration), VO2, and heart rate recorded.

Main Results:

  • Participant comfortable propulsion speed averaged 1.1±0.2 m/s.
  • At functional speeds (1-1.3 m/s), RPE_respiration and RPE_arm ranged from 7-13 on the Borg scale, corresponding to 37-80% VO2peak.
  • No significant differences were found between RPE_arm and RPE_respiration across various exercise intensities, including the GXT.

Conclusions:

  • Ratings of perceived exertion (RPE_arm and RPE_respiration) show potential for assessing and monitoring daily wheelchair propulsion intensity in individuals with paraplegia.
  • The findings suggest that RPE can be a reliable tool to gauge exertion during wheelchair mobility.
  • Further research can explore RPE's utility in exercise prescription and rehabilitation programs for wheelchair users.