In one of the most-anticipated action sequels of 2013, Vin Diesel returned to the big screen as Riddick in the franchise's latest sci-fi thriller, Riddick, out on DVD and Blu-ray January 14. In the exclusive video below, the June 2013 Men's Fitness cover guy explains that much of the movie is a transformation from Riddick being out of shape to getting back into fighting form. "People on Facebook knew I was MIA... I was up in the woods, maybe 30 miles from the Catskil Mountains--there are only a few bears up there," Diesel told Men's Fitness in his June cover story about the filming of Riddick.

Watch the video, and enter here to win a Riddick Blu-ray/DVD combo pack and a Toshiba 32-inch HDTV!

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