Guna masa race yang anda dah capai untuk predict masa finish kat distance lain (formula Riegel).
Predicting a finish time at one distance from a result at another rests on a simple observation: the pace a runner can hold drops in a fairly predictable way as distance grows. The standard model raises the distance ratio to a fixed exponent, which lands close enough for most runners to be useful. It is a starting point for goal setting, not a guarantee.
They are most accurate when the distances are close together, when the race you enter was run recently at full effort, and when your training actually supports the target distance. Predicting a 10K from a 5K is usually within a minute. Predicting a marathon from a 5K is almost always optimistic, because the marathon exposes endurance and fuelling limits a 5K never touches. If you have not run the long runs, the prediction is describing a version of you that does not exist yet.
Predictions assume the target race runs in similar conditions to the one you entered. That rarely holds here. A time set on a cool December morning will not repeat in March at 85 percent humidity. Run the predicted pace through the Heat and Humidity Pace Adjuster before you commit to a goal, then build your pace band from the adjusted number.
Treat the prediction as the ceiling of what is possible on a good day, then set your actual race plan a little inside it. Runners who race at exactly their predicted pace from the gun tend to find out in the last quarter whether the prediction was right. Runners who start slightly inside it usually finish faster.
Within about one to two percent when the two distances are close and the input race is recent and hard. The error grows quickly as the gap widens, so a half marathon predicted from a 10K is reasonable while a marathon predicted from a 5K should be treated as a best case scenario.
Because the model only knows your speed, not your endurance. Marathon performance depends on long run volume, fuelling and pacing discipline, none of which appear in a 5K result. If your longest run is 15 km, the prediction is describing potential rather than readiness.
The most recent race you ran at full effort, within the last six weeks or so. If you have results at several distances, use the one closest to the distance you are predicting.
Set it slightly inside. Give yourself a target you can commit to from the start and a stretch goal for the last third if the day is going well. Chasing the exact predicted pace from kilometre one leaves no room for heat, hills or a bad stomach.
No. It assumes similar conditions in both races. Put the result through the Heat and Humidity Pace Adjuster to get a target that reflects the temperature and humidity you will actually be racing in.
Turn any distance and finish time into pace per km, pace per mile and speed.
Open tool →Break a goal finish time into every kilometre split, ready to print.
Open tool →Get your Easy, Marathon, Threshold, Interval and Repetition paces from a race time.
Open tool →