The aim of the present study was to determine the effects of a 4-week exercise training intervention on blood glucose, insulin sensitivity, BMI (body mass index) and cardiorespiratory fitness in patients with Type 2 diabetes, and to identify and establish criteria for patients who are more likely to improve their blood glucose from short-term exercise training. A randomized, controlled trial of exercise training, comprising two supervised and one non-supervised sessions of individualized cardiorespiratory and resistance exercise per week, was performed in 132 healthy patients with Type 2 diabetes (exercise training group, n=68), with the aim of accumulating a minimum of 150 min of moderate-intensity exercise for 4 weeks. BMI, waist circumference, blood pressure, blood lipid profile, blood glucose, insulin, insulin sensitivity [calculated by HOMAIR (homoeostasis model assessment of insulin resistance) and QUICKI (quantitative insulin check index)], β-cell function (calculated by HOMAβ-Cell), HbA1c (glycated haemoglobin) and V̇O2max (maximal oxygen consumption) were measured at baseline and at 4 weeks. The exercise training group had significant improvements in V̇O2max, BMI and triacylglycerols (triglycerides). There were no significant changes in blood glucose, HOMAIR, QUICKI or HOMAβ-Cell. Decreases in blood glucose were significantly predicted by baseline blood glucose and HbA1c, with these variables accounting for 15.9% of the change in blood glucose (P<0.001). ROC (receiver operator characteristic) curve analysis revealed that patients with a blood glucose >8.85 mmol/l (sensitivity=73%, specificity=78%) and HbA1c >7.15% (sensitivity=79%, specificity=60%) were more likely to achieve a clinically significant decrease in blood glucose. In conclusion, in apparently healthy patients with Type 2 diabetes, a 4-week exercise intervention improved cardiorespiratory fitness, BMI and triacylglycerols. Elevated blood glucose and HbA1c predicted improvements in blood glucose.
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Research Article|
October 01 2008
Determinants of changes in blood glucose response to short-term exercise training in patients with Type 2 diabetes
Matthew D. Hordern;
*School of Medicine, University of Queensland, Princess Alexandra Hospital, Brisbane, QLD 4102, Australia
Correspondence: Dr Matthew D. Hordern (email m.hordern@uq.edu.au).
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Louise M. Cooney;
Louise M. Cooney
*School of Medicine, University of Queensland, Princess Alexandra Hospital, Brisbane, QLD 4102, Australia
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Elaine M. Beller;
Elaine M. Beller
†School of Population Health, University of Queensland, Princess Alexandra Hospital, Brisbane, QLD 4102, Australia
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Johannes B. Prins;
Johannes B. Prins
*School of Medicine, University of Queensland, Princess Alexandra Hospital, Brisbane, QLD 4102, Australia
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Thomas H. Marwick;
Thomas H. Marwick
*School of Medicine, University of Queensland, Princess Alexandra Hospital, Brisbane, QLD 4102, Australia
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Jeff S. Coombes
Jeff S. Coombes
‡School of Human Movement Studies, University of Queensland, Brisbane, QLD 4072, Australia
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Publisher: Portland Press Ltd
Received:
November 28 2007
Revision Received:
February 01 2008
Accepted:
February 06 2008
Accepted Manuscript online:
February 06 2008
Online ISSN: 1470-8736
Print ISSN: 0143-5221
© The Authors Journal compilation © 2008 Biochemical Society
2008
Clin Sci (Lond) (2008) 115 (9): 273–281.
Article history
Received:
November 28 2007
Revision Received:
February 01 2008
Accepted:
February 06 2008
Accepted Manuscript online:
February 06 2008
Citation
Matthew D. Hordern, Louise M. Cooney, Elaine M. Beller, Johannes B. Prins, Thomas H. Marwick, Jeff S. Coombes; Determinants of changes in blood glucose response to short-term exercise training in patients with Type 2 diabetes. Clin Sci (Lond) 1 November 2008; 115 (9): 273–281. doi: https://doi.org/10.1042/CS20070422
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