Suuntoのインスタグラム(suunto) - 5月26日 21時24分
"Running economy is the holy grail for distance runners, not a high VO2 max," says XTERRA World Champion and professional coach @josiahmiddaugh
Click the link in our bio to become a stronger runner - and to read Josiah’s article on running economy!
#howdoirun #suuntorun
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