U.S. ultraunner Mike Wardian is running across America

Wardian plans on running 80 kilometres per day, with the goal of raising $100,000 for clean drinking water for families around the world

Camille Herron becomes youngest runner to join 100K Lifetime Miles club

100,000 miles is equivalent to four laps around Earth by foot

Study finds Nike and Asics models are the top performance shoes

The difference in running economy between models can translate to four to six minutes off your marathon time