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“The Rock” Shows Off His “21 (inch) Gun” Bicep Curl Workout

Want to know how ‘The Rock’ keeps his 21 inch guns so swole?  He shared a portion of his workout on his Instagram page. View this post on Instagram A…

LOS ANGELES, CA – JULY 17: Actor Dwayne Johnson speaks onstage during Nickelodeon Kids’ Choice Sports Awards 2014 at UCLA’s Pauley Pavilion on July 17, 2014 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

(Photo by Kevin Winter/Getty Images)

Want to know how 'The Rock' keeps his 21 inch guns so swole?  He shared a portion of his workout on his Instagram page.