Comparison of asynchronous versus synchronous arm crank ergometry

K. Mossberg, C. Willman, M. A. Topor, H. Crook, S. Patak

    Research output: Contribution to journalArticle

    35 Citations (Scopus)

    Abstract

    Study Design: A direct comparison of synchronous versus asynchronous arm crank ergometry has not been carried out previously. Therefore, a comparative research design was employed. Objective: To assess the physiological responses of arm cranking when performed asynchronously (arms moving opposite to each other) versus synchronously (both arms moving in the same direction simultaneously). Setting: A university hospital setting in Galveston, Texas, USA. Methods: Seventeen individuals between the ages of 19 and 53 years were studied, 11 with paraplegia and six with no apparent disability. Two maximal arm crank graded exercise tests were performed with the subject seated in a wheelchair. Testing consisted of both arms (1) asynchronously (reciprocally) pushing and pulling the crank handles and (2) pushing and pulling the crank handles synchronously. Each test consisted of 2 min stages starting at 20 W and increasing 10 W per stage thereafter until exhaustion. Heart rate, oxygen consumption, and minute ventilation were measured and recorded during each stage. Blood lactate levels were monitored before and after each test. Statistical analysis was performed using the multivariate Hotelling's T2 followed by post hoc univariate tests. Results: Greater power and longer test times (both groups, P < 0.05) and higher post test blood lactates (nondisabled P < 0.01, paraplegic P < 0.05) were achieved with asynchronous cranking versus synchronous cranking. While submaximal responses were similar between the two modes of cranking, there was a tendency for all variables to be lower with asynchronous. All subjects preferred asynchronous rather than synchronous cranking. Conclusion: Despite few statistically significant differences, based on the subjective reports from all subjects, we believe there is a clinically significant difference between the two modes of cranking. The results suggest that the mode of cranking may have implications for arm crank testing, training, and functional locomotion in individuals with lower extremity impairments.

    Original languageEnglish (US)
    Pages (from-to)569-574
    Number of pages6
    JournalSpinal Cord
    Volume37
    Issue number8
    StatePublished - 1999

    Fingerprint

    Ergometry
    Arm
    Lactates
    Wheelchairs
    Paraplegia
    Hematologic Tests
    Locomotion
    Exercise Test
    Oxygen Consumption
    Ventilation
    Lower Extremity
    Lactic Acid
    Research Design
    Heart Rate

    Keywords

    • Blood lactate
    • Exercise testing
    • Heart rate
    • Minute ventilation
    • Oxygen consumption
    • Spinal cord injury

    ASJC Scopus subject areas

    • Clinical Neurology

    Cite this

    Mossberg, K., Willman, C., Topor, M. A., Crook, H., & Patak, S. (1999). Comparison of asynchronous versus synchronous arm crank ergometry. Spinal Cord, 37(8), 569-574.

    Comparison of asynchronous versus synchronous arm crank ergometry. / Mossberg, K.; Willman, C.; Topor, M. A.; Crook, H.; Patak, S.

    In: Spinal Cord, Vol. 37, No. 8, 1999, p. 569-574.

    Research output: Contribution to journalArticle

    Mossberg, K, Willman, C, Topor, MA, Crook, H & Patak, S 1999, 'Comparison of asynchronous versus synchronous arm crank ergometry', Spinal Cord, vol. 37, no. 8, pp. 569-574.
    Mossberg K, Willman C, Topor MA, Crook H, Patak S. Comparison of asynchronous versus synchronous arm crank ergometry. Spinal Cord. 1999;37(8):569-574.
    Mossberg, K. ; Willman, C. ; Topor, M. A. ; Crook, H. ; Patak, S. / Comparison of asynchronous versus synchronous arm crank ergometry. In: Spinal Cord. 1999 ; Vol. 37, No. 8. pp. 569-574.
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    KW - Exercise testing

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    KW - Minute ventilation

    KW - Oxygen consumption

    KW - Spinal cord injury

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