The ITRA Performance Index is a tool designed to assess and compare the performance levels of trail runners globally. It is the official and most accurate trail running index worldwide, approved and used by World Athletics.
- The index operates on a scale from 0 to 1000, with 1000 being the maximum.
- It is calculated on a runner's performance using a weighted mean of their five best race scores in the past 36 months.
- Weighted mean emphasizes the highest and most recent results over older ones for greater accuracy.
- The same calculation method is used for both men and women, allowing direct performance comparisons.
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