The Three Mistakes That Cost Me A Marathon PB.

Mark attempted to break 2:50 at the London Marathon earlier this year, and now he's back for redemption. Here's everything he's changed about his training to make sure he smashes his PB in Chicago.

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What’s in this video?
00:00 - Intro
01:31 - Fixing mindset and pressure
04:33 - Prioritising speed over volume
07:34 - Switching to structured training
10:10 - Final long run and race plan

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