Mackenzie Madison retweetledi

How did Gustav Iden run 2:34(!) to close out his debut Ironman? He must be really cranking up the pace in training? Nope.
Here is his average weekly run data for the last 3mo.
Of his ~90km/wk, 2/3 was at only ~80% of his Ironman pace (~60% of his 5K pace!)
#TrainSlowRaceFast

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