Journal
CURRENT DIABETES REVIEWS
Volume 19, Issue 7, Pages -Publisher
BENTHAM SCIENCE PUBL LTD
DOI: 10.2174/1573399819666221212145712
Keywords
Exercise; aerobic exercise; resistance training; type 2 diabetes; obesity; myokine; skeletal muscle
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This paper explores the effect of chronic exercise on myokines in patients with type 2 diabetes (T2D) and/or obesity. The results show that chronic exercise does not change BDNF, irisin, and secreted protein acidic and rich in cysteine levels, but decreases TNF-α levels in patients with T2D. Combined aerobic exercise (AE) and resistance training (RT) or sprint interval training increase IGF-1 levels and decrease IL-6 and IL-15 levels in patients with T2D. Combined AE and RT may also increase IL-15 levels in obese individuals. In addition, RT alone may increase BDNF, IGF-1, and IL-7 levels in overweight individuals. However, AE alone does not change circulating myokine levels in patients with T2D, while it may increase myonectin levels in obese individuals.
Background Skeletal muscle is an endocrine organ that plays an important role in metabolic health by secreting a variety of myokines. Recent studies have shown that exercise significantly decreases interleukin-6 (IL-6) and tumor necrosis factor-& alpha; (TNF-& alpha;) in patients with type 2 diabetes (T2D). This paper explores the effect of chronic exercise on myokines in patients with T2D and/or obesity. Methods The author searched for relevant English-language articles in PubMed. A total of 14 randomized controlled studies were found to be eligible for this short review. Results It has been observed that chronic exercise does not change brain-derived neurotrophic factor (BDNF), irisin, and secreted protein acidic and rich in cysteine levels, whereas it decreases TNF-& alpha; levels in patients with T2D. Combined aerobic exercise (AE) and resistance training (RT) or sprint interval training increase insulin-like growth factor 1 (IGF-1) levels and decrease IL-6 and IL-15 levels in patients with T2D. Combined AE and RT may also increase IL-15 levels in obese individuals. In addition, RT alone may increase BDNF, IGF-1, and IL-7 levels in overweight individuals. However, AE alone does not change circulating myokine levels in patients with T2D, while it may increase myonectin levels in obese individuals. Conclusion This short review demonstrated that exercise appears to have favorable effects on some myokines in patients with T2D and/or obesity. However, it remains inconclusive due to the heterogeneity in subject characteristics and exercise modalities.
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