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Justin Theroux shows off his bulging biceps in tank top as he hits the boxing gym
He is a self-proclaimed fitness nut who has sculpted his body with an array of different exercises.And on Tuesday Justin Theroux took pride in showing off the results of all his hard work when he flaunted his bulging biceps in a photo taken at a boxing gym in New York City.The actor, who turns 50 in August, also took to his Instagram page to share an adorable video of his beloved dog, Kuma, staring at her owner while leaning her head on a living room table.Scroll down to video Men of steel: Justin Theroux showed off his bulging biceps when he struck a classic boxing pose with the owner off the Gotham Gym, Rob Piela, in Downtown New York City on TuesdayIn the most recent image, Theroux sat ringside with Rob Piela, a trainer and owner of