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Acute Ketogenic Diet and Ketone Ester Supplementation Impairs Race Walk Performance
Short-Term Ketogenic Diet and Ketone Supplements Reduce Race Walk Performance
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Abstract
The LCHF diet impaired race performance by approximately 6% compared to baseline.
- The oxygen cost of exercise increased after the LCHF diet, indicating a higher energy requirement.
- Fat oxidation rates increased while carbohydrate oxidation decreased following the LCHF diet.
- Substrate utilization remained unchanged in the high-carbohydrate group.
- Ketone ester supplementation before the LCHF diet raised circulating ketone levels but did not affect oxygen consumption or respiratory exchange ratio.
- Resting levels of circulating ketones were higher after the LCHF diet compared to baseline, but post-supplementation levels were similar to earlier trials.
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Key numbers
~6%
Performance Decrease
Performance impairment in LCHF group compared to baseline.
3.2 ± 0.6 mM
Circulating Ketone Bodies Peak
Peak concentration of ketone bodies after KE ingestion.