The most direct match for "Runner3" is the development of the program. This qualitative study used the "Intervention Mapping" framework to create an online system that provides feedback on training volume and injury risk to help adult recreational runners avoid common injuries.
For a more general but highly practical read, this paper synthesizes dozens of studies to provide "rules" for better running.
It covers overlooked dimensions like recovery, tapering, and cultivating a "goal-centric mental state" to improve long-distance performance. Source: Ten Simple Rules for Better Running 4. Specialized Niche: Speedrunning