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Riegel's race prediction

— Posted in Hardlopen by

I have added the famous Riegel race prediction, based on the formula below.

Predicted time = Given time * (new distance/original distance)1.06

Easy, right? You can check out the calculator now. Of course, be cautious in using its output. It's nice to predict a marathon time based on a recent 10K time, but it does absolutely not guarantee anything. You should train accordingly.

Yasso calculator

— Posted in Hardlopen by

Today, I've added a Yasso calculator. While a Yasso doesn't have to be 'calculated' (just use your marathon hours as minutes and minutes as seconds), but I'd like to know which pace (per km or mile) I should use. I have used the following calculation.

  • Kilometer pace: (minutes60+seconds)/8001000 (and revert to minutes:seconds)
  • Mile pace: (minutes60+seconds)/8001609 (and revert to minutes:seconds)

So, when your (desired) marathon time is 3:30, you should do a Yasso (800 meters) in 3 minutes and 30 seconds. Using the formula's above, this comes down to a kilometer pace of 4:22 and a mile pace of 07:22.