Published October 31, 2015 at dimensions 510 × 259 in Fine-tuning Age-Grading for Marathoners.

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https://www.y42k.com/wp/wp-content/uploads/2015/10/vanderburgh3.jpg https://www.y42k.com/wp/wp-content/uploads/2015/10/rw-data2.jpg

Men’s marathon WR times vs. age

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