Marathon maniac off to a running start

A Chinese runner who successfully finished all six of the World Marathon Majors before the age of 40 has her sights set on a new challenge - the world's highest trail-running event.

Zhang Wenjie was athletic from an early age, but she had never experienced marathon running until she moved to the United States to study at Northeastern University in Boston, Massachusetts, in 2007.

Greater Boston is home to the world's oldest annual marathon, having hosted a race every year since 1897. It is one of the six World Marathon Majors - the others being in Tokyo, London, Berlin, Chicago and New York.