Clinical outcomes and glycaemic responses to different aerobic exercise training intensities in type II diabetes

a systematic review and meta-analysis

Aimee Grace, Erick Chan, Francesco Giallauria, Petra L. Graham, Neil A. Smart*

*Corresponding author for this work

    Research output: Contribution to journalArticle

    44 Citations (Scopus)
    34 Downloads (Pure)

    Abstract

    Aims: To establish if aerobic exercise training is associated with beneficial effects on clinical outcomes and glycaemic profile in people with type II diabetes. Methods: A systematic search was conducted to identify studies through a search of MEDLINE (1985 to Sept 1, 2016, Cochrane Controlled Trials Registry (1966 to Sept 1, 2016), CINAHL, SPORTDiscus and Science Citation Index. The search strategy included a mix of MeSH and free text terms for related key concepts. Searches were limited to prospective randomized or controlled trials of aerobic exercise training in humans with type II diabetes, aged >18 years, lasting >2 weeks. Results: Our analysis included 27 studies (38 intervention groups) totalling 1372 participants, 737 exercise and 635 from control groups. The studies contain data from 39,435 patient-hours of exercise training. Our analyses showed improvements with exercise in glycosylated haemoglobin (HbA1C%) MD: -0.71%, 95% CI -1.11, -0.31; p value = 0.0005. There were significant moderator effects; for every additional week of exercise HbA1C% reduces between 0.009 and 0.04%, p = 0.002. For those exercising at vigorous intensity peak oxygen consumption (peak VO2) increased a further 0.64 and 5.98 ml/kg/min compared to those doing low or moderate intensity activity. Homeostatic model assessment of insulin resistance (HOMA-IR) was also improved with exercise MD: -1.02, 95% CI -1.77, -0.28; p value = 0.007; as was fasting serum glucose MD: -12.53 mmol/l, 95% CI -18.94, -6.23; p value <0.0001; and serum MD: -10.39 IU, 95% CI -17.25, -3.53; p value = 0.003. Conclusions: Our analysis support existing guidelines that for those who can tolerate it, exercise at higher intensity may offer superior fitness benefits and longer program duration will optimize reductions in HbA1C%.

    Original languageEnglish
    Article number37
    Pages (from-to)1-10
    Number of pages10
    JournalCardiovascular Diabetology
    Volume16
    Issue number1
    DOIs
    Publication statusPublished - 14 Mar 2017

    Bibliographical note

    Copyright the Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

    Keywords

    • exercise intensity
    • cardio-respiratory fitness
    • type II diabetes

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