Naked Chuck Liddell Video A Viral Campaign From Reebok?

TMZ reports this video featuring a naked Chuck Liddell and his girlfriend Heidi Northcutt working out is a viral effort for Reebok. It seems plausible given the only thing they're wearing are sneakers. The video should probably be categorized NSFW even though all the naughty bits have been digitally covered. View video after the jump.