(FORTUNE Magazine) – After nearly a quarter century at BankAmerica Corp., vice chairman Robert W. Frick is taking his money and running -- and biking and swimming. The 50-year- old head of world banking is leaving in September to train full time for triathlons, grueling long-distance races that require competitors to run, cycle, and swim. ''I've looked at my life as a series of 25-year segments,'' says Frick. At the half-century mark, the banker feels, ''It's time to do other things.'' One of B of A's few remaining top managers with ties to former CEO Samuel Armacost, who resigned under fire in 1986, Frick guided the world banking group through the worst of the Latin American debt crisis. He leaves behind a troubled institution (see Book Excerpt), but one that is on the mend under once and present Chief Executive A. W. Clausen. After running B of A's world banking department, Frick may find a triathlon to be a cakewalk, a downhill ride, and a refreshing splash.