Some endurance athletes can have blood sugar levels that look like they're prediabetic or diabetic, even though they're actually healthy, because their bodies use up glucose so fast during training.
From Why Are These Carnivores Becoming Diabetic? · videoSee the scientific wording
Endurance athletes may display fasting blood glucose levels within the prediabetic or diabetic range despite being metabolically healthy, due to increased glucose demand and utilization associated with their training regimen.
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Some endurance athletes can have blood sugar levels that look like they're prediabetic or diabetic, even though they're actually healthy, because their bodies use up glucose so fast during training.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review of Fasting Glucose Levels in Metabolically Healthy Endurance Athletes vs. Sedentary Controls
Systematic review and meta-analysis of prospective studies comparing fasting glucose, HOMA-IR, insulin sensitivity, and metabolic health markers in endurance athletes versus matched non-athletes, with subgroup analysis by training volume.
Randomized Controlled Trial of Endurance Training Intensity on Fasting Glucose and Metabolic Health in Healthy Adults
Double-blind, placebo-controlled RCT where one group undergoes structured endurance training (e.g., 12 weeks of progressive running/cycling) and control maintains baseline activity, with fasting glucose, HbA1c, insulin sensitivity, and body composition measured pre- and post-intervention.
Longitudinal Cohort Study of Fasting Glucose Trends in Elite Endurance Athletes Over a 5-Year Period
Prospective cohort of elite endurance athletes followed over 5 years with annual assessments of fasting glucose, HbA1c, insulin sensitivity, training load, and incident metabolic disease.
Cross-Sectional Analysis of Fasting Glucose and Metabolic Markers in National-Level Endurance Athletes
Cross-sectional study measuring fasting glucose, HOMA-IR, lipid profile, body composition, and training history in 500 national-level endurance athletes aged 18–40.
Case Report Series: Athletes with Diagnosed 'Prediabetes' Later Confirmed Metabolically Healthy
Series of 5–10 detailed clinical case reports of endurance athletes referred for prediabetes, undergoing full metabolic workup (e.g., OGTT, hyperinsulinemic-euglycemic clamp) confirming insulin sensitivity.