Doing really intense endurance workouts might raise your blood sugar levels and make it look like you have diabetes, even if your body is actually super healthy.

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Pro

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Against

Evidence from Studies

Supporting (1)

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Community contributions welcome

15

Enhanced glucose production in norepinephrine and palmitate stimulated hepatocytes following endurance training

Cross-Sectional Study

Animal

2024

The study shows that endurance training makes liver cells produce more glucose, which matches part of the claim. But it doesn’t show if this raises blood sugar or HbA1c enough to look like diabetes in healthy people.

Contradicting (0)

0

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No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

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Doing light, steady exercise like walking or slow cycling doesn’t seem to change blood sugar levels much in healthy adults who don’t usually exercise.

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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.

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