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    Preliminary findings in the heart rate variability and haemorheology response to varied frequency and duration of walking in women 65-74 yr with type 2 diabetes

    Access Status
    Fulltext not available
    Authors
    Simmonds, M.
    Minahan, C.
    Serre, K.
    Gass, G.
    Marshall-Gradisnik, S.
    Haseler, Luke
    Sabapathy, S.
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Simmonds, M. and Minahan, C. and Serre, K. and Gass, G. and Marshall-Gradisnik, S. and Haseler, L. and Sabapathy, S. 2012. Preliminary findings in the heart rate variability and haemorheology response to varied frequency and duration of walking in women 65-74 yr with type 2 diabetes. Clinical Hemorheology and Microcirculation. 51 (2): pp. 87-99.
    Source Title
    Clinical Hemorheology and Microcirculation
    DOI
    10.3233/CH-2011-1514
    ISSN
    1386-0291
    School
    School of Physiotherapy and Exercise Science
    URI
    http://hdl.handle.net/20.500.11937/57192
    Collection
    • Curtin Research Publications
    Abstract

    Heart rate variability (HRV) and haemorheology adaptations to 12 wk of varied-dose treadmill walking were investigated in women aged 65-74 yr with type 2 diabetes. Subjects were randomly allocated into two groups where exercise frequency and session duration were manipulated (Group 1 : 2 × 60 min·wk -1 or Group 2 : 4 × 30 min·wk -1 ), but intensity and accumulated weekly duration of exercise were consistent between groups (100% gas-exchange threshold; 120 min·wk -1 ). Twelve weeks of exercise training significantly improved peak oxygen uptake, time to exhaustion, and gas-exchange threshold (p < 0.05), independent of exercise group. Exercise training did not significantly change glycaemic control or body mass. Red blood cell (RBC) aggregation and RBC deformability significantly decreased (p < 0.05) for both groups. No change in HRV was observed for Group 1, whereas several key indicators of HRV were significantly improved in Group 2 (p < 0.05). The present study was the first to report decreased RBC aggregation following an exercise-only intervention and that exercise training improved RBC aggregation without a concomitant improvement in glycaemic control. The accumulated weekly exercise duration may be the most important training component for the prescription of exercise in older women with type 2 diabetes. © 2012 - IOS Press and the authors. All rights reserved.

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