How many grams of carbs should a runner really have?

With some studies and elites now talking about 120g of carbs an hour in a race, it's a confusing and expensive time to be needing some gels.

Thankfully, leading sports dietician Renee McGregor joins us to break down how the body absorbs and uses carbohydrate, when to have it and how to find the amount that you really need to have on race day.

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