You have to be light to be good at running.

No, you don't. 

 

Running is basically a sequence of small jumps for ages and ages. And sure, if you're heavier, you'll have more impact to deal with - but there is no reason you cannot condition yourself for it. 

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Don't worry, I'm not going to tell you that your foot strike is wrong, or that you need better shoes. 

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Instead, I'm going to show you a couple of small, game-changing technique tweaks that could help you run longer, faster and remain pain-free -  and prove everybody wrong.