Tough Mudder participants
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Tough Mudder: Is this your idea of a good away day?

8 July 2014 Last updated at 11:17 BST

It is perhaps not everyone's idea of team bonding, or a great company away day, but the founder of Tough Mudder is banking annual revenues of more than $100m (£58m).

Last year, nearly a million people around the world paid up to $200 (£116) to run, jump, swim, crawl and haul themselves around a 10 to 12 mile military-style obstacle course.

In the events, organised by the New York-based firm, participants are confronted by icy water, mud, live electric cables and barbed wire.

Will Dean, Tough Mudder's founder and chief executive, spoke to the BBC's Aaron Heslehurst.