Seriously? OMG! WTF?

(video from The Big Lead)
One of the most popular videos on the net over the last few days has been Chuck Liddell and his girlfriend, Heidi Northcott working out naked. Everyone has been wondering why and how they could do that? I know I want to know because it would be nice not to have to worry about sweaty clothes, but it does seem like it could get painful you move in the wrong way.

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