Pace Band / Riegel 1977

Run a 10K in 50:00?

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Endurance fade: exponent

Riegel's 1.06 assumes you train for the longer distance. Slide right to see what happens if you are a short-distance runner: the marathon time grows far more than the 5K time shrinks.

Pace band

Strategy

Km	Split	Pace	Clock

Formula: T2 = T1 x (D2 / D1)^1.06 (Peter Riegel, Runner's World, August 1977), meant for efforts of roughly 3.5 to 230 minutes (Riegel, American Scientist, 1981). Distances: marathon 42.195 km, half 21.0975 km; 1 mile = 1.609344 km. Source: Wikipedia, Peter Riegel. Everything runs in your browser.