Sean Astin (shown here during the Kaiser Permanente Rock ‘n’ Roll Half Marathon earlier this month) has a thing for trilogies; 2012 was his third Los Angeles marathon. "The new route is awesome," the Lord of the Rings star told The Hollywood Reporter. "You go everywhere now —Olvera Street, City Hall, Hollywood. It's like a big open house for the city." He started running as a teenager, continuing a fitness regime into his 40s. Yet, the training is a bit unorthodox. “I'll go for two months without a single run, and then I'll run 20 miles in a month, and then 100 miles the next month, then 120 the months after that, then work my way back down to nothing again,” Astin told the Los Angeles Times. Sporadic? Yes. But it seems to work.