Grete Waitz, the world's greatest female marathoner, speaks as part of the Women@Google series. Grete Waitz has been running for more than 40 years, breaking world records, breaking down barriers to women, and promoting fitness throughout the world. For the last two years she has been fighting a new challenge -- cancer. Grete discusses how to make health and fitness a lifestyle, as well as how to hone your running skills. This event took place June 12, 2007 at Google Headquarters in Mountain View, CA.