A comparison of normal versus low dietary carbohydrate intake on substrate oxidation during and after moderate intensity exercise in women

被引：0
作者：
Rachel Patterson
Jeffrey A. Potteiger
机构：
[1] Miami University,Department of Kinesiology and Health
[2] Grand Valley State University,Department of Movement Science
来源：
European Journal of Applied Physiology | 2011年 / 111卷
关键词：
RER; Obesity; Women; Body fat; Exercise; Low-carbohydrate diet;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We compared the effects of consuming a 2-day low-carbohydrate (CHO) diet (low-CHO; 20% CHO, 40% protein, 40% fat) versus an isocaloric 2-day moderate-CHO diet (mod-CHO; 55% CHO, 15% protein, 30% fat) on substrate oxidation during and after exercise in ten active, young women. Subjects were 24.9 ± 6.2% body fat with a VO2max of 68.8 ± 13.8 ml/kg FFM/min. For 2 days prior to exercise, subjects consumed either the mod-CHO or the low-CHO diet and then completed treadmill exercise at 55% of VO2max until 350 kcal of energy was expended. During exercise and for 2 h post-exercise, expired gases were analyzed to determine oxidation rates for CHO (CHO-OX) and fat (FAT-OX). Significant differences (p < 0.05) were found between diets for CHO-OX and FAT-OX (mg/kg FFM/min) during exercise, 1 h post-ex, and 2 h post-ex. During exercise, FAT-OX was higher (low-CHO 8.7 ± 2.2 vs. mod-CHO 6.2 ± 2.2) and CHO-OX was lower (low-CHO 25.1 ± 5.6 vs. mod-CHO 31.1 ± 6.2) following the low-CHO diet. A similar trend was observed during 1 h post-ex for FAT-OX (low-CHO 2.2 ± 0.5 vs. mod-CHO 1.6 ± 0.5) and CHO-OX (low-CHO 2.5 ± 1.2 vs. mod-CHO 4.1 ± 1.9), as well as 2 h post-ex for FAT-OX (low-CHO vs. 1.9 ± 0.5 mod-CHO 1.7 ± 0.4) and CHO-OX (low-CHO 2.5 ± 0.9 vs. mod-CHO 3.1 ± 1.1). Significant positive correlations were observed between VO2max and CHO-OX during exercise and post-exercise, as well as significant negative correlations between VO2max and FAT-OX post-exercise in the low-CHO condition. Waist circumference and FAT-OX exhibited a significant negative correlation during exercise in the low-CHO condition. Dietary macronutrient intake influenced substrate oxidation in active young women during and after moderate intensity exercise.
引用
收藏
页码：3143 / 3150
页数：7
相关论文
共 159 条
[1]  
Achten J(2004)Optimizing fat oxidation through exercise and diet Nutrition 20 716-727
[2]  
Jeukendrup AE(2002)Determination of the exercise intensity that elicits maximal fat oxidation Med Sci Sport Exerc 34 92-97
[3]  
Achten J(2006)Low-carbohydrate diets: nutritional and physiological aspects Obes Rev 7 49-58
[4]  
Gleeson M(2008)High-protein meals may benefit fat oxidation and energy expenditure in individuals with higher body fat Nutr Diet 65 246-252
[5]  
Jeukendrup AE(2003)A randomized trial comparing a very low carbohydrate diet and a calorie-restricted low fat diet on body weight and cardiovascular risk factors in healthy women J Clin Endocrinol Metab 88 1623-1201
[6]  
Adam-Perrot A(2004)Improvements in insulin resistance with aerobic exercise training: a lipocentric approach Med Sci Sports Exerc 36 1196-850
[7]  
Clifton P(2004)Use of Vitamins Containing folic acid among women of childbearing age—United States, 2004 MMWR 53 847-1853
[8]  
Brouns F(1995)Skeletal muscle utilization of free fatty acids in women with visceral obesity J Clin Investig 95 1846-172
[9]  
Batterham AM(1986)Muscle glycogen utilization during prolonged strenuous exercise when fed carbohydrates J Appl Physiol 61 165-E275
[10]  
Cavanagh PR(1997)Fatty acid oxidation is directly regulated by carbohydrate metabolism during exercise Am J Physiol 273 E268-1350
12345678910