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Looking for some muscle-aching, leg-pumping, adrenaline-spilling, epically-intimidating challenges to help us save lives?
Well, look no further. We've been busy compiling some of the toughest fundraising challenges in the world - from fan favourite Tough Mudder to the mighty Iron Man.
Read 'em and weep (then visit our site and check out some of the amazing challenges you can take on with Anthony Nolan):