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Physical training may enhance beta-cell function in type 2 diabetes.

Flemming Dela1, Michael E von Linstow, Kári Joensen Mikines

  • 1Copenhagen Muscle Research Centre, The Panum Institute, University of Copenhagen, 2200 Copenhagen N, Denmark. fdela@mfi.ku.dk

American Journal of Physiology. Endocrinology and Metabolism
|July 15, 2004
PubMed
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Exercise training improved beta-cell function in type 2 diabetes patients with moderate insulin secretion. Low secretors did not benefit, indicating training

Area of Science:

  • Endocrinology
  • Metabolic Health
  • Exercise Physiology

Background:

  • Exercise training impacts insulin sensitivity and secretion in healthy individuals.
  • The effect of training on beta-cell function in type 2 diabetes remains unclear.

Purpose of the Study:

  • To investigate the impact of a 3-month exercise program on beta-cell function in type 2 diabetic patients.
  • To determine if training benefits patients with varying levels of C-peptide secretion.

Main Methods:

  • Patients with type 2 diabetes were stratified into moderate and low secretors based on C-peptide response.
  • Participants underwent a 3-month ergometer cycling program or maintained a sedentary lifestyle.
  • Beta-cell function was assessed using hyperglycemic and arginine stimulation tests before and after the intervention.

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Main Results:

  • Training significantly increased maximal oxygen consumption (Vo(2 max)) and reduced submaximal heart rate.
  • Moderate secretors showed enhanced insulin and C-peptide responses to hyperglycemia and arginine.
  • Low secretors and sedentary groups exhibited no significant changes in beta-cell function, insulin sensitivity, or HbA1c.

Conclusions:

  • Exercise training can enhance beta-cell function in type 2 diabetic patients with moderate secretory capacity.
  • Training does not improve beta-cell function in patients with low secretory capacity.
  • Improvements in beta-cell function occurred independently of changes in insulin sensitivity or HbA1c levels.