Chuck Liddell's XXX Workout -- The Naked Truth Video!!

Chuck Liddell and his extremely hot girlfriend will not be going after the person who taped them working out in a gym -- in nothing but shoes -- because the naked twosome was in on the act.

This is the most dumbest and sexiest thing i've ever seen.

The UFC badass and Heidi Northcott agreed to do the revealing workout for a viral campaign for Reebok -- a company that Chuck already has a sponsorship deal with.


Still, hope somebody sterilized the equipment after the shoot.