Are you ready to work work work work work smfdskjlgshmfmlsjfowefj work work work? Well, you better be, because our recent YouTube obsession, The Fitness Marshall, has a new cardio hip-hop workout set to the Rihanna song of the moment for you. The high-intensity workout video, hosted by the ever-entrancing Caleb with his kickass moves, will get you into shape in under four minutes. And with dance cardio gaining popularity, we can't wait to see what else The Fit Marshall has up his sleeve.
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