Changes

* '''Blisters'''. Blisters become an increasing problem as the distance becomes greater and/or the running surface becomes more hostile. Runners should not have a problem with blisters in a road marathon. Longer races, especially the 100 mile, causes blisters to be a significant issue for many runners. Additionally, hostile surface, such as very rocky or very hot can create problems at shorter distances. Follow the advice at [[Blister Prevention]], but remember that in long races, your feet are likely to swell. This means that changing to larger shoes, or thinner socks, may be required.

* '''Fortitude'''. For most runners, the marathon distance is quite painful. The longer distances of ultramarathons test the boundaries of both physical and mental endurance. The ability to keep moving forward in the face of extreme pain, fatigue, physical damage and sometimes emotional despair is critical. [A detailed tip to follow]