Olympic gold medalist James Cracknell is no stranger to a challenge, having rowed the Atlantic, cycled across the Arctic, run an ultramarathon across the Sahara Desert (not to mention winning two Olympic Gold Medals). Cracknell is now spearheading the Duracell Power Me campaign, which aims to motivate people to get more out of their lives.
The following video gives a taste of what he's in for as he takes on a series of challenges in the London Eye, one of the UK's best known landmarks. Watch James cycle, box, lift weights, work out with a balance ball, do circuits and finish with a Duracell Bunny workout, which takes him a total of three hours as the London Eye slowly rotates.
Video: James Cracknell takes on the Wheel of Endurance
Show your support for James or get involved yourself at www.facebook.com/Duracell