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Effect of High-Fat, High-Carbohydrate, and High-Protein Meals on Metabolism and Performance during Endurance Cycling
How high-fat, high-carb, and high-protein meals affect metabolism and performance during endurance cycling
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Abstract
The high-carbohydrate meal halved the peak fat-oxidation rate compared to high-protein and high-fat meals.
- Fat oxidation decreased across all workloads after consuming high-carbohydrate meals, showing a reduction by a factor of 0.20 to 0.58.
- Lower plasma fatty acid and glycerol levels, along with higher pre-exercise insulin concentrations, were observed after high-carbohydrate meals.
- The high-protein meal resulted in fat oxidation rates similar to those following high-fat meals.
- Greater fat breakdown and plasma fat availability were indicated after high-protein meals compared to high-carbohydrate meals.
- Despite differences in metabolism, meal composition did not clearly influence sprint or 50-km performance.
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