How Hard Is It To Run 100km? Well, you probably already know the answer to that question but Mark and friend of the channel & pro triathlete, Sam Pictor, set out to find out...just because! The route takes in the awesome Cotswold Way from Cheltenham to Bath - let's see how they got on!

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How hard is it to run 100km? Well...we'd imagine it’s a question you’ve never bothered asking...because...well, you likely know the answer! But, still Mark - rather foolishly - thought he'd be the guinea pig in this, purely for your entertainment!

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Watch more on GTN...
📹 What Happens To Your Body When You Stop Exercising? 👉 https://gtn.io/StoppedTrainingTTE
📹 The Hardest Triathlon In The World? 👉 https://gtn.io/NorsemanGTN

Music - licensed by Epidemic Sound:
ES_Dansez - Fasion
ES_Magnified XY - Farrell Wooten
ES_Mumbai - Ooyy
ES_Outbreak - Fasion
ES_Priddy - Fasion
ES_Valium - nothanks
ES_Wrap - Sum Wave

Photos: © Triathlon / Getty Images

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