Strasser B, Spreitzer A, Haber P
Department of Internal Medicine IV, Division of Sports Medicine, Medical University Vienna, Vienna, Austria.
Ann Nutr Metab. 2007;51(5):428-32. doi: 10.1159/000111162. Epub 2007 Nov 20.
This study was designed to compare the effects of 2 different but isocaloric fat reduction programs with the same amount of energy deficit - diet alone or diet combined with aerobic training - on body composition, lipid profile and cardiorespiratory fitness in non- or moderately obese women.
Twenty non- or moderately obese (BMI 24.32 +/- 3.11) females (27.3 +/- 6.6 years) were tested at the beginning and after an 8-week period of a mild hypocaloric diet for the following parameters: (1) body mass and body fat; (2) total cholesterol, HDL-C, LDL-C and triglycerides; (3) lactate (millimol/liter) during submaximal exertion (100 W); (4) heart rate during submaximal exertion (100 W), and (5) maximum exercise performance (watt). Subjects were randomly divided into either a diet alone (D, -2,095 +/- 659 kJ/day) or a diet (-1,420 +/- 1,084 kJ/day) plus exercise (DE, three 60-min sessions per week at 60% of VO(2)max or -5,866 kJ/week) group.
Body mass and body fat decreased significantly in D (-1.95 +/- 1.13 kg or -1.47 +/- 0.87%; p < 0.05) and DE (-2.23 +/- 1.28 kg or -1.59 +/- 0.87%; p < 0.05), but there was no significant difference observed between the groups. Statistical analysis revealed no significant changes of total cholesterol, HDL-C, LDL-C, triglycerides and heart rate during submaximal exertion (100 W). Lactic acid accumulation during submaximal exertion (100 W) decreased significantly (-0.8 +/- 1.4 mmol/l, p < 0.05) in DE and increased significantly (+0.4 +/- 0.5 mmol/l, p < 0.05) in D. Maximum exercise performance improved significantly (+12.2 +/- 8.8 W, p < 0.05) in DE and did not change significantly in D.
This study showed that independently of the method for weight loss, the negative energy balance alone is responsible for weight reduction.
本研究旨在比较两种不同但热量相等的减脂方案（能量赤字相同——单纯节食或节食结合有氧运动）对非肥胖或中度肥胖女性身体成分、血脂谱和心肺适能的影响。
20名非肥胖或中度肥胖（BMI 24.32±3.11）女性（27.3±6.6岁）在开始时以及进行为期8周的轻度低热量饮食后，接受以下参数测试：（1）体重和体脂；（2）总胆固醇、高密度脂蛋白胆固醇、低密度脂蛋白胆固醇和甘油三酯；（3）次最大运动强度（100瓦）时的乳酸（毫摩尔/升）；（4）次最大运动强度（100瓦）时的心率；（5）最大运动表现（瓦特）。受试者被随机分为单纯节食组（D组，-2095±659千焦/天）或节食（-1420±1084千焦/天）加运动组（DE组，每周三次，每次60分钟，运动强度为最大摄氧量的60%或-5866千焦/周）。
D组（-1.95±1.13千克或-1.47±0.87%；p<0.05）和DE组（-2.23±1.28千克或-1.59±0.87%；p<0.05）的体重和体脂均显著下降，但两组之间未观察到显著差异。统计分析显示，次最大运动强度（100瓦）时总胆固醇、高密度脂蛋白胆固醇、低密度脂蛋白胆固醇、甘油三酯和心率无显著变化。DE组次最大运动强度（100瓦）时的乳酸积累显著下降（-0.8±1.4毫摩尔/升，p<0.05），D组显著增加（+0.4±0.5毫摩尔/升，p<0.05）。DE组的最大运动表现显著提高（+12.2±8.8瓦，p<0.05），D组无显著变化。
本研究表明，无论采用何种减肥方法，单纯的能量负平衡是体重减轻的原因。
