From the ArcaMax Publishing, Trivia Newsletter:
http://www.arcamax.com/news/trivia/s-366413-228931
Persons that engage in solitary endurance sports are the ones most likely to be compulsive exercisers - for example, joggers, long-distance swimmers, weight-lifters, and cross-country skiers. Occasionally, devotees of these activities set unrealistic, ambitious goals and then drive themselves mercilessly to reach them. A study of New York marathoners a few years ago found that their divorce rate - male and female - was twice the national average.
This news arrived on: 06/20/2008