Dwayne "The Rock" Johnson stopped by "The Tonight Show" on Tuesday, July 22, to promote his new movie, "Hercules". When asked how he got in tip-top shape for the role, Johnson revealed he turned to his old VHS tapes of The Fungo Brothers, a fitness duo who were way ahead of their time.
Watch the two-part series below and go get your burn on -- because "You gotta hustle, for the muscle!"
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