Women are completing the 13.1-mile distance in record numbers.
Half marathons and female runners are the wind in the industry's sails.
The industry continues to show massive growth.
The "average" runner tends to prefer technology and the 5K.
The American 800m champion thinks his sport is dying.
The big get bigger with 13.1-mile events leading the road race boom.
Running USA has completed its yearly state of the sport review, and in the newly released Part One the running industry is assessed by