Race time predictor
Riegel and Cameron: your result projected onto other distances
Formula and method
Riegel: T₂ = T₁ × (D₂ ÷ D₁)^1.06. Cameron applies a correction function and holds up better over long distances — the main column shows the average of the two. VDOT follows Daniels’ method via oxygen cost and the fraction of VO₂max sustainable for a given duration.
Sources
- Riegel P.S. Athletic records and human endurance. American Scientist, 1981.
- Daniels J. Daniels’ Running Formula, 3rd edition, 2013.