A "Lore of Running PDF" is:

: Detailed programs for everything from 10Ks to ultramarathons. Health & Injuries

The "hot" part of the search indicates that runners are tired of the same old static advice. They want the controversial , the updated , and the downloadable truth. They want a PDF they can annotate, highlight, and argue over in their running club.

But here is the final piece of hot lore, the one that no PDF can truly capture: