This On the Run episode takes us  for a visit to the home of 2010 ING New York City Marathon champion Edna Kiplagat in beautiful Iten, Kenya, and find out how marathon training runs in her family. Closer to home, learn how Black Girls Run “preserve sexy,” and how the organization has grown to 40,000 members strong in just three years. You can also strengthen your core with more great training tips from Pascal Dobert and Matt Tegenkamp.