Effects of aerobic exercise and dietary carbohydrate on energy expenditure and body composition during weight reduction in obese women
| Autor: | Susan B. Racette, K M Neil, K Herling-Iaffaldano, Dale A. Schoeller, Robert F. Kushner |
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| Předmět: |
Adult
medicine.medical_specialty Diet therapy Medicine (miscellaneous) Physical exercise Doubly labeled water Weight loss Internal medicine Weight Loss Dietary Carbohydrates medicine Humans Aerobic exercise Obesity Exercise Meal Nutrition and Dietetics Chemistry Middle Aged medicine.disease Endocrinology Basal metabolic rate Body Composition Female medicine.symptom Energy Intake Energy Metabolism |
| Zdroj: | Europe PubMed Central |
| Popis: | To test the benefits of aerobic exercise and dietary carbohydrate during reduced-energy feeding, 23 obese women (44 +/- 4% fat) were randomly assigned to either aerobic exercise (Ex) or no exercise (Nx), and to a low-fat (LF) or low-carbohydrate (LC) reducing diet (5.00 +/- 0.56 MJ/d) for 12 wk. Changes in body composition, postabsorptive resting metabolic rate (RMR), thermic effect of a meal (TEM), and total daily energy expenditure (TDEE) were measured by respiratory gas exchange and doubly labeled water. Significant effects of Ex included a greater loss of fat mass (Ex: -8.8 +/- 2.1 vs Nx: -6.1 +/- 2.3 kg, P = 0.008) and maintenance of TDEE (Ex: +0.07 +/- 1.23 vs Nx: -1.46 +/- 1.04 MJ/d, P = 0.004), due to a difference in physical activity (Ex: +0.75 +/- 1.06 vs Nx: -0.61 +/- 1.03 MJ/d, P = 0.006), which was not attributable solely to the Ex sessions. RMR in both groups decreased comparably (-0.54 MJ/d), and TEM (% of meal) did not change. Diet composition did not significantly influence body composition or energy expenditure changes, but a greater weight loss was observed after the LC than after the LF (-10.6 +/- 2.0 vs -8.1 +/- 3.0 kg, P = 0.037) diet. The addition of aerobic exercise to a low-energy diet was beneficial in the treatment of moderate obesity because of its favorable effects on body composition, physical activity, and TDEE. |
| Databáze: | OpenAIRE |
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