On one side, there was an effort intellectualization running, and sensations / philosophical considerations that we - the runners - encounter during our daily wanderings are quite well described. We often recognize this infinite thought over and well described, the source of untold lot of fleeting intuitions soon sarrêtent sneakers shelved!
On the other, it is true to join other comments that the book's structure is confused, not quite explicit at times and comes down a bit to a style exercise on running and philosophical considerations which are not all the same interest.
Laudable intention, but form again!