Can eating fat make you run longer?
Low-Carbohydrate-High-Fat Diet: Can it Help Exercise Performance?
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Some athletes eat mostly fat and very little carbs for months, and their bodies learn to burn fat like a furnace instead of relying on carbs.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
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Evidence Score
Based on clinical experience or non-systematic literature reviews. The lowest level of evidence as they are most susceptible to bias and personal perspective.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Some athletes eat mostly fat and very little carbs for months, and their bodies learn to burn fat like a furnace instead of relying on carbs.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 51 / 5
Evidence Score
Based on clinical experience or non-systematic literature reviews. The lowest level of evidence as they are most susceptible to bias and personal perspective.
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Claims (6)
Eating a high-fat, low-carb diet for a long time might make you feel more tired during long races because it increases certain chemicals in your blood that can affect your brain and make you feel sluggish.
For athletes who need to make weight (like wrestlers or boxers), eating low-carb and high-fat for a long time might help them lose fat without losing muscle, which is safer than starving or sweating off weight quickly.
Even when eating almost no carbs after a race, athletes who’ve been on a high-fat, low-carb diet for months can still rebuild their muscle sugar stores just as well as those eating lots of carbs.
After months of eating mostly fat and very little carbs, elite endurance athletes can burn fat much faster during long races, helping them save their body’s limited sugar stores for when they need a final burst of speed.
You can’t just switch to a low-carb, high-fat diet and expect to perform better in endurance sports right away—it takes months for your body to adjust and start burning fat efficiently.