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Intramyocellular lipid stores increase markedly in athletes after 1.5 days lipid supplementation and are utilized during exercise in proportion to their content
Muscle fat stores quickly increase after 1.5 days of fat supplements in athletes and are used during exercise based on their amount
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Abstract
Pre-exercise intramyocellular lipid (IMCL) concentrations were 55% higher after a high-fat diet compared to a low-fat diet.
- IMCL utilization during exercise was threefold greater with high fat compared to low fat.
- Higher IMCL levels were correlated with greater aerobic power and initial content.
- Glycogen levels and reductions during exercise were similar across diet conditions.
- Whole-body fat oxidation remained similar, but plasma fatty acid oxidation was lower during the first hour of exercise after the high-fat diet.
- Myocellular fuels accounted for 8% more of the total energy demands after the high-fat diet due to increased IMCL breakdown.
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