KMID : 1199120100340020101
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Korean Diabetes Journal 2010 Volume.34 No. 2 p.101 ~ p.110
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The Effects of Resistance Training on Muscle and Body Fat Mass and Muscle Strength in Type 2 Diabetic Women
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Kwon Hwi-Ryun
Han Kyung-Ah Ku Yun-Hyi Ahn Hee-Jung Koo Bo-Kyung Kim Ho-Chul Min Kyung-Wan
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Abstract
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Background: Our goal was to investigate the effects of low intensity resistance training on body fat, muscle mass and strength, cardiovascular fitness, and insulin sensitivity in type 2 diabetes.
Methods: Twenty-eight overweight women with type 2 diabetes were randomly assigned to a resistance training group (RG, n = 13) or a control group (CG, n = 15). RG performed resistance training using elastic bands, of which strength was equal to 40 to 50% of one repetition maximum (1RM), for three days per week. Each exercise consisted of three sets for 60 minutes. We assessed abdominal fat using computed tomography, muscle mass using dual-energy X-ray absorptiometry, and muscle strength using Keiser¡¯s chest and leg press. Insulin sensitivity was measured using the insulin tolerance test, and aerobic capacity was expressed as oxygen uptake at the anaerobic threshold (AT-VO2) before and after the 12-week exercise program.
Results: The age of participants was 56.4 ¡¾ 7.1 years, duration of diabetes was 5.9 ¡¾ 5.5 years, and BMI was 27.4 ¡¾ 2.5 kg/m2, without significant differences between two groups. During intervention, a greater increase in muscle mass and greater decreases in both total fat mass and abdominal fat were observed in RG compared to those of CG (P = 0.015, P = 0.011, P = 0.010, respectively). Increase in 1RM of upper and lower extremities was observed in the RG (P = 0.004, P = 0.040, respectively), without changes in AT-VO2 and insulin resistance in either group.
Conclusion: In conclusion, the low intensity resistance training was effective in increasing muscle mass and strength and reducing total fat mass without change of insulin sensitivity in type 2 diabetic patients.
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KEYWORD
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Abdominal fat, Type 2 diabetes mellitus, Muscle strength, Resistance training
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