Glycolytic ATP Regeneration
Glycolysis
ATP regenerated
Fuel & Food Energy Explorer
Compare nutrient amounts with food energy. Follow how fuels connect to ATP regeneration.
Hypothetical nutrient amounts—not a dietary recommendation or a food's total weight.
Enter 0–200 grams for each nutrient, using whole numbers.
About the estimate
The simplified 4/4/9 factors estimate food energy from carbohydrate, protein, and fat. Actual food-label totals can differ because of rounding, fiber, sugar alcohols, and other calculation methods. This model excludes alcohol. kcal values are not ATP amounts or exercise fuel-use percentages.
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Oxidative ATP Regeneration
Oxidative metabolism
Requires oxygen
Requires oxygen
ATP regenerated
Selected borders show connections, not how much a pathway contributes. This simplified map omits intermediate reactions. Food composition does not predict exercise fuel-use percentages.
Explore changing exercise demands in the Energy Systems tool