Substrate oxidation in overweight boys at rest, during exercise and acute post-exercise recovery
| Autor: | Rebecca Braham, Nicole A. Crisp, Melissa K. Licari, Kym J. Guelfi |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Male
medicine.medical_specialty Time Factors Rest Overweight Body Mass Index Absorptiometry Photon Oxygen Consumption Internal medicine medicine Humans Treadmill Child Exercise Respiratory exchange ratio Rest (music) Aerobic capacity Adiposity Analysis of Variance Nutrition and Dietetics business.industry Health Policy Public Health Environmental and Occupational Health Calorimetry Indirect Recovery of Function Western Australia Lipid Metabolism medicine.disease Substrate (marine biology) Obesity Endocrinology Normal weight Case-Control Studies Anesthesia Pediatrics Perinatology and Child Health Exercise Test Carbohydrate Metabolism medicine.symptom Energy Metabolism business Oxidation-Reduction |
| Zdroj: | International Journal of Pediatric Obesity. 6:e615-e621 |
| ISSN: | 1747-7174 1747-7166 |
| DOI: | 10.3109/17477166.2010.543684 |
| Popis: | To compare substrate oxidation between normal weight (n = 10) and overweight (n = 10) boys at rest, during exercise at 50% VO(2peak) and during the first 30 minutes of recovery post-exercise.Twenty boys (8-11 years) were tested over two separate occasions. At the first session, body composition was measured by Dual-Energy X-ray Absorptiometry and peak aerobic capacity (VO(2peak)) was assessed using an incremental treadmill protocol. At least one week later, substrate oxidation was determined via indirect calorimetry in the fasted state at rest, during 10 minutes of exercise at 50% VO(2peak) and during the first 30 minutes of acute recovery post-exercise.There were no significant differences in substrate oxidation between the two groups at rest or during exercise. However, during early recovery, respiratory exchange ratio (RER) transiently increased in the overweight boys (p = 0.034) but not in the normal weight boys (p = 0.796), with a shift towards greater carbohydrate oxidation in the former group at 15-20 (p = 0.044) and 25-30 (p = 0.052) minutes post-exercise. In contrast, absolute post-exercise fat oxidation was similar between the two groups.Overweight boys may oxidise fat less efficiently than normal weight boys during recovery post-exercise, deriving a greater proportion of energy from carbohydrate oxidation. |
| Databáze: | OpenAIRE |
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