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How carbohydrate and fat supplements affect carbohydrate use during long exercise
Updated
Abstract
No significant differences in muscle glycogen breakdown were detected among the carbohydrate and medium-chain triglyceride supplementation trials during exercise.
- Muscle glycogen levels were similar across all trials, with values of 277 +/- 14 mmol/kg for CHO, 249 +/- 20 for CHO + MCT, and 240 +/- 18 for HCHO + MCT.
- Mean exogenous carbohydrate oxidation rates during the final hour of exercise were measured at 0.79, 0.63, and 0.73 g/min for the respective trials.
- No significant differences were found in the respiratory exchange ratio during exercise across the trials.
- Plasma free fatty acid concentrations reached approximately 500 micromol/L and were consistent across all trials.
- Plasma ketone concentrations increased significantly after medium-chain triglyceride ingestion compared to the carbohydrate trial.
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