Diabetes Metab J > Volume 33(6); 2009 > Article
Korean Diabetes Journal 2009;33(6):526-536.
DOI: https://doi.org/10.4093/kdj.2009.33.6.526    Published online December 1, 2009.
The Effects of Low-Calorie Diets on Abdominal Visceral Fat, Muscle Mass, and Dietary Quality in Obese Type 2 Diabetic Subjects.
Hee Jung Ahn, Youn Ok Cho, Hwi Ryun Kwon, Yun Hyi Ku, Bo Kyung Koo, Kyung Ah Han, Kyung Wan Min
1Diabetes Center, Eulji Hospital, Seoul, Korea.
2Department of Food and Nutrition, Duksung Women's University, Seoul, Korea.
3Department of Internal Medicine, Eulji University School of Medicine, Daejeon, Korea. minyungwa@yahoo.co.kr
4Department of Internal Medicine, Seoul National University School of Medicine, Seoul, Korea.
Abstract
BACKGROUND
Weight loss through low-calorie diets (LCDs) decreases visceral fat (VF). However, the effects on muscle mass, changes of dietary quality, and insulin sensitivity are unknown for Korean obese type 2 diabetic subjects. Therefore, this study examined such effects of LCDs. METHODS: A total of 30 obese type 2 diabetic subjects (body mass index, 27.0 +/- 2.2 kg/m2) were randomly assigned to an LCD or control group. Subjects on LCDs took 500~1,000 kcal fewer energy than their usual dietary intake (1,000~1,500 kcal/day) over the course of 12 weeks. The abdominal VF and femoral muscle mass were evaluated by computed tomography, and insulin sensitivity was assessed using an insulin tolerance test (Kitt; rate constant for plasma glucose disappearance, %/min). Dietary nutrient intake consumed by subjects was assessed by 3-day food records. RESULTS: The percent VF reduction was -23.4 +/- 17.2% in the LCD group and -9.8 +/- 11.8% in the control group after 12 weeks (P < 0.001, P = 0.002). However, significant decrease in femoral mass or proportional change of marcronutrient intake and mean adequacy ratio were not found in the LCD group, as compared to the control group. Insulin sensitivity improved in the LCD group, as compared to the control group (P = 0.040). CONCLUSION: LCD effectively improved insulin sensitivity and reduced abdominal VF without reduction of femoral muscle and dietary quality in obese type 2 diabetic subjects.
Key Words: Caloric restriction, Intraabdominal fat, Type 2 diabetes mellitus, Weight loss


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