NFL linebacker D.J. Williams, last with the Chicago Bears and currently a free agent, has been spending his time in the gym at his alma mater University of Miami.
Performing grueling strength exercises like Towel Pull-Ups and 45-pound Weighted Sit-Ups, and squatting with Bears tight end Martellus Bennett, Williams recently posted a video to his Instagram where he performs a Plank-Walk, which builds shoulder stability, core strength and endurance. Watch below as Williams and a couple Miami players race:
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