Hal Koerner's Field Guide to Ultrarunning

The book offers specific plans for different distances, which shows a lot of thought. I wonder what experiences or research led to these particular methods.

The stories of perseverance and the emphasis on mental toughness really resonated. I’m curious if it inspired others to lace up and start training.

There’s a lot of practical advice that seems rooted in personal experience and science. I wonder how much of it was developed through trial and error versus research.