That’s often summed up (as in the title of Matt Fitzgerald’s 2014 book on the topic) as 80-20 running: around 80 percent ... that the exact same training plan might look either polarized ...
That’s often summed up (as in the title of Matt Fitzgerald’s 2014 book on the topic) as 80-20 running: around 80 percent ... that the exact same training plan might look either polarized ...
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