Kwon Hwi Ryun, Min Kyung Wan, Ahn Hee Jung, Seok Hee Geum, Koo Bo Kyung, Kim Ho Chul, Han Kyung Ah
Diabetes Center, Eulji Hospital, Seoul, Korea.
Korean Diabetes J. 2010 Feb;34(1):23-31. doi: 10.4093/kdj.2010.34.1.23. Epub 2010 Feb 28.
Aerobic exercise can effectively reduce visceral fat. However, few studies have examined the effect of daily physical activity on obesity and cardiopulmonary function in the subjects with diabetes. We examined the effect of moderate intensity of walking in obese diabetes patients by monitoring of daily activity and measuring the change in abdominal fat area, muscle are and maximal muscle strength.
We randomly assigned 27 obese women with type 2 diabetes to an aerobic exercise group (AG, n = 13) and control group (CG, n = 14). The AG performed moderate intensity walking for 60 minutes per exercise, 5 times per week, and for 12 weeks. The activity energy expenditure was monitored by a multi-record accelerometer. The CG maintained routine daily activities. At the time of the initiation of the study and after 12 weeks of exercise, the aerobic exercise capacity was assessed using oxygen consumption rate at anaerobic threshold (VO(2)-AT). The abdominal fat area and the quadriceps muscle area were measured by computed tomography, and the maximum muscle strength of the upper and lower limbs was measured by a chest press and a leg press, respectively.
The mean age of the study subjects was 56.6 +/- 8.0 years, the mean duration of diabetes was 6.3 +/- 6.0 years, and the body weight index (BMI) was 27.3 +/- 2.7 kg/m(2). The BMI of the AG was significantly decreased (P = 0.003). In the AG, the visceral fat area and subcutaneous fat area were also significantly decreased (P = 0.018 and P < 0.001, respectively) but not in CG. VO(2)-AT of the AG was significantly improved, while that of the CG did not change (P = 0.009 and P = 0.115, respectively). The quadriceps muscle mass and the maximal muscle strength of the AG did not change, however, the CG showed a significant decrease. Duration of moderate intensity exercise was correlated with the decrease in total abdominal fat area (r = -0.484; P = 0.011) and that of high intensity exercise was correlated with improvement of cardiopulmonary function (r = 0.414; P = 0.032).
Daily moderate intensity aerobic exercise is effective at reducing abdominal fat mass, while high intensity exercise improves cardiopulmonary function.
有氧运动能有效减少内脏脂肪。然而，很少有研究探讨日常体力活动对糖尿病患者肥胖及心肺功能的影响。我们通过监测日常活动并测量腹部脂肪面积、肌肉面积和最大肌肉力量的变化，研究了中等强度步行对肥胖糖尿病患者的影响。
我们将27名肥胖的2型糖尿病女性随机分为有氧运动组（AG，n = 13）和对照组（CG，n = 14）。AG组每次运动进行60分钟中等强度步行，每周5次，共12周。通过多记录加速度计监测活动能量消耗。CG组维持日常常规活动。在研究开始时和运动12周后，使用无氧阈值下的耗氧率（VO(2)-AT）评估有氧运动能力。通过计算机断层扫描测量腹部脂肪面积和股四头肌面积，分别通过胸推和腿推测量上下肢的最大肌肉力量。
研究对象的平均年龄为56.6±8.0岁，糖尿病平均病程为6.3±6.0年，体重指数（BMI）为27.3±2.7kg/m(2)。AG组的BMI显著降低（P = 0.003）。在AG组中，内脏脂肪面积和皮下脂肪面积也显著降低（分别为P = 0.018和P < 0.001），但CG组未出现此情况。AG组的VO(2)-AT显著改善，而CG组未改变（分别为P = 0.009和P = 0.115）。AG组的股四头肌质量和最大肌肉力量未改变，然而，CG组出现显著下降。中等强度运动的持续时间与腹部总脂肪面积的减少相关（r = -0.484；P = 0.011），高强度运动的持续时间与心肺功能的改善相关（r = 0.414；P = 0.032）。
日常中等强度有氧运动对减少腹部脂肪量有效，而高强度运动可改善心肺功能。
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