Archives of Physical Medicine and Rehabilitation
Volume 87, Issue 8 , Pages 1106-1114 , August 2006

Cardiovascular Responses and Postexercise Hypotension After Arm Cycling Exercise in Subjects With Spinal Cord Injury

  • Victoria E. Claydon, PhD

      Affiliations

    • International Collaboration On Repair Discoveries, University of British Columbia, Vancouver, BC, Canada
    • ,
  • Adrienne T. Hol, MSc

      Affiliations

    • International Collaboration On Repair Discoveries, University of British Columbia, Vancouver, BC, Canada
    • School of Rehabilitation Sciences, University of British Columbia, Vancouver, BC, Canada
    • GF Strong Rehabilitation Centre, Vancouver, BC, Canada.
    • ,
  • Janice J. Eng, PhD, PT, OT

      Affiliations

    • International Collaboration On Repair Discoveries, University of British Columbia, Vancouver, BC, Canada
    • School of Rehabilitation Sciences, University of British Columbia, Vancouver, BC, Canada
    • GF Strong Rehabilitation Centre, Vancouver, BC, Canada.
    • ,
  • Andrei V. Krassioukov, MD, PhD

      Affiliations

    • International Collaboration On Repair Discoveries, University of British Columbia, Vancouver, BC, Canada
    • School of Rehabilitation Sciences, University of British Columbia, Vancouver, BC, Canada
    • Corresponding Author InformationCorrespondence to Andrei V. Krassioukov, MD, PhD, International Collaboration On Repair Discoveries (ICORD), 6270 University Blvd, University of British Columbia, Vancouver, BC V6T 1Z4, Canada

  • Image Result

    (A) SAP and (B) DAP responses to exercise. Resting seated SAP and DAP were significantly higher in subjects with thoracic than those with cervical SCI. After exercise, SAP was increased in the subject

    (A) SAP and (B) DAP responses to exercise. Resting seated SAP and DAP were significantly higher in subjects with thoracic than those with cervical SCI. After exercise, SAP was increased in the subjects with thoracic SCI, but was decreased in those with cervical SCI. After exercise, DAP was unchanged in subjects with thoracic-level SCI, but was decreased in those with cervical SCI. During the recovery from exercise, blood pressures began to return to the resting levels in both groups, but were consistently elevated in subjects with thoracic compared with cervical SCI. *P<.05; †P<.01; ‡P<.001 cervical versus thoracic; §P<.05; ∥P<.01; P<.001 within-group comparison against the resting condition. Note the change in scale in the lower panel.

  • Image Result
    Heart rate (HR) responses to exercise. Resting seated heart rates were significantly lower in cervical than thoracic SCI subjects. The heart rate at the end of exercise was increased in both cervical

    Heart rate (HR) responses to exercise. Resting seated heart rates were significantly lower in cervical than thoracic SCI subjects. The heart rate at the end of exercise was increased in both cervical and thoracic groups, but this increase was greater in those with thoracic SCI. During the recovery from exercise heart rate decreased in both groups toward the resting supine levels, and was significantly greater in those with thoracic SCI at all time points. *P<.05; †P<.001 cervical versus thoracic; ‡P<.05; §P<.01; ∥P<.001 within-group comparison against the resting condition.

  • Image Result
    Correlation between the maximum heart rate (HR) during exercise and (A) the number of reproducible SSR and (B) the MAP response immediately after stopping exercise. Data from thoracic SCI subjects are

    Correlation between the maximum heart rate (HR) during exercise and (A) the number of reproducible SSR and (B) the MAP response immediately after stopping exercise. Data from thoracic SCI subjects are shown in the open circles and cervical SCI subjects in the closed circles. There was a significant positive correlation between the maximum heart rate achieved during the exercise test and the number of reproducible palmar SSR elicited. There was also a significant correlation between the maximum heart rate response during the exercise test and the change in blood pressure immediately after cessation of the exercise test.

 Supported by the Rick Hansen Man In Motion Research Foundation (grant no. 05-0747), the Canadian Institutes of Health Research (career scientist award), and Michael Smith Foundation of Health Research.No commercial party having a direct financial interest in the results of the research supporting this article has or will confer a benefit upon the authors or upon any organization with which the authors are associated.Reprints are not available from the author.

PII: S0003-9993(06)00442-4

doi: 10.1016/j.apmr.2006.05.011

Archives of Physical Medicine and Rehabilitation
Volume 87, Issue 8 , Pages 1106-1114 , August 2006

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