Tone Shred HIIT and Core with Karena Katrina and Jillian. Word Search Puzzle Solver. Tone Shred HIIT and Core with Karena Katrina and Jillian word Search Puzzle Game. Find words related to movie actors, actresses, and genres. Word Search Puzzle Solver. Tone & Shred is the first collaboration between Jillian Michaels and Tone It Up exclusively for FitFusion. in Tone & Shred: HIIT and Core this 25-minute workout combines techniques from the most popular and powerful fitness modalities - HIIT Yoga Pilates dynamic resistance training and more to ensure incredible variety maximum results and a sweat session you'll like showing up for! This includes identifying and searching for words that are related to : Karena Dawn, Jillian Michaels, Katrina Scott .