متنبئ وقت السباق – معادلة ريغل

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• The Riegel formula for race time prediction uses the equation T2 = T1 × (D2/D1)^1.06, where the exponent 1.06 captures the non-linear fatigue of running longer distances.
• Pete Riegel first published his race prediction formula in a 1977 issue of American Scientist magazine.
• Race time predictions become less accurate beyond the marathon because extreme fatigue, pacing strategy, and nutrition create much more individual variation than shorter distances.