1.   Joe also combines his sporting activities with marathon running, having completed two London and three Liverpool races.

2.   American marathon running has been going through lean years.

3.   And the group mentality may be a key reason why marathon running has become increasingly popular.

4.   And the increasing proportion of women who are interested in marathon running may contribute to the numbers of organized running groups that are popping up nationally.

5.   But he was also prepared for some of the more common problems associated with marathon running.

6.   Chebet, Cheruiyot and Kororia are coached by an Italian doctor, Gabriele Rosa, and are part of a group that has dominated marathon running this year.

7.   Doctor-to-be Kempainen should be living testimony to the health benefits of marathon running.

8.   For most people, medical school and marathon running are full-time occupations.

9.   If American marathon running gets better, we get better.

10.   In marathon running, a challenge is not necessarily a good thing.