The more you can move, the better. I've done a 24 hr foot race, a 12 hr race and a 100 mi race in the past year. There are diminishing returns. :-) (Somewhere

The more you can move, the better. I've done a 24 hr foot race, a 12 hr race and a 100 mi race in the past year. There are diminishing returns. :-) (Somewhere around 100K I think you reach maximal discomfort, though maybe I just haven't pushed through to that next level of suffering yet.)