According to Running USA, the estimated number of U.S. marathon finishers declined from a record 518,000 in 2011 to 487,000 in 2012 (a 6% decrease), but most of the decline can be attributed to a uniq...

The total value of the U.S. tennis economy grew by just over 3% last year, up to $5.57 billion. The data is found in the Tennis Industry Association's annual "Economic Index," created to evaluate the ...

The 2013 National Runner Survey tracks not only runner demographics and exercise habits, but use of technology and social media, economic impact information such as willingness to travel to participat...