Understanding the factors that effect maximal fat oxidation
| Autor: | Christine M. Mermier, Troy M. Purdom, Karol Dokladny, Len Kravitz |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
medicine.medical_specialty
medicine.medical_treatment Maximal fat oxidation 030209 endocrinology & metabolism lcsh:TX341-641 Clinical nutrition Review Carbohydrate metabolism Cpt-1 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Oxygen Consumption Endurance training Internal medicine Carnitine medicine Dietary Carbohydrates Humans lcsh:Sports medicine Beta oxidation Dietary fat oxidation Exercise Crossover concept Nutrition and Dietetics Chemistry Cholesterol Substrate oxidation Fatty Acids 030229 sport sciences Fat oxidation Ketogenic diet Dietary Fats Fat adaptation PDH activity Endocrinology Exercise intensity lcsh:RC1200-1245 lcsh:Nutrition. Foods and food supply Oxidation-Reduction Food Science medicine.drug |
| Zdroj: | Journal of the International Society of Sports Nutrition, 15:3 Journal of the International Society of Sports Nutrition Journal of the International Society of Sports Nutrition, Vol 15, Iss 1, Pp 1-10 (2018) |
| Popis: | Lipids as a fuel source for energy supply during submaximal exercise originate from subcutaneous adipose tissue derived fatty acids (FA), intramuscular triacylglycerides (IMTG), cholesterol and dietary fat. These sources of fat contribute to fatty acid oxidation (FAox) in various ways. The regulation and utilization of FAs in a maximal capacity occur primarily at exercise intensities between 45 and 65% VO2max, is known as maximal fat oxidation (MFO), and is measured in g/min. Fatty acid oxidation occurs during submaximal exercise intensities, but is also complimentary to carbohydrate oxidation (CHOox). Due to limitations within FA transport across the cell and mitochondrial membranes, FAox is limited at higher exercise intensities. The point at which FAox reaches maximum and begins to decline is referred to as the crossover point. Exercise intensities that exceed the crossover point (~65% VO2max) utilize CHO as the predominant fuel source for energy supply. Training status, exercise intensity, exercise duration, sex differences, and nutrition have all been shown to affect cellular expression responsible for FAox rate. Each stimulus affects the process of FAox differently, resulting in specific adaptions that influence endurance exercise performance. Endurance training, specifically long duration (>2 h) facilitate adaptations that alter both the origin of FAs and FAox rate. Additionally, the influence of sex and nutrition on FAox are discussed. Finally, the role of FAox in the improvement of performance during endurance training is discussed. |
| Databáze: | OpenAIRE |
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