Fauja Singh, however, will run a marathon. The 101-year-old British Sikh has, like Pope Benedict, announced his retirement … from marathon running. Shockingly, Singh didn’t begin running marathons until age 89, and has since run five London Marathons and a total of eight races. His 26-mile swan song will be the Hong Kong Marathon on Feb. 24, as he acknowledges that age has finally caught up to him. “But I will keep running to inspire the masses,” he says. “Running is my life and I really would not have stopped competing if I had not crossed the age of 100.” So, yes, at age 101, Fauja Singh will have run his ninth marathon. On your way to the gym yet?