This Sunday, Joy Johnson, 81, will run her 21st consecutive New York City marathon. Johnson is the defending champion in the 80-and-over age group, a title she has held for 5 of the past 11 years. In this Wall Street Journal video, Johnson says that when her time started slipping a year ago, rather than accepting that she was slowing down she decided to train harder. So far, she's shaved an hour off her time. [The Wall Street Journal]