Running has taken a high toll on Kristy Seymour, but it never occurred to her to quit. “I’m not going to give up,” the 32-year-old Princeton, N.J., native vowed Sunday after completing the San Francisco Marathon. “It’s part of who I am.” That resolve came in handy as Seymour sped up and down The City’s slopes to finish the race with an unofficial time of 3:37:19. Read More