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Old 07-09-17, 10:45 PM
mathking mathking is offline
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Last year NTR was the most common PR course for the top kids. But that data set is smallish. I am not going to go through all their data but for mine there is a lot of variability in PR course. Which is why I use same meet times year over year.

I actually have found that 1600 time improvement is my best predictor of XC improvement for boys under 18:00 and girls under 21:00. I think because track season is much closer than the previous XC season and most good XC runners run at least one fresh 1600 late in track season. (The last couple years, with the proliferation of auto timed dual meets really helps.)
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