"More Fire: How to Run the Kenyan Way" is authored by Toby Tanser, a former professional runner who is now director of the New York Road Runners (the world's largest running club), member of the advisory board of Runner's World, and author of several books on running. The book is his take on why Kenyan runners have come to dominate distance running and what lessons can be taken from their training and applied elsewhere to non-elite runners of all abilities and ages.
Tanser went to Kenya to observe several running camps and to interview both coaches and elite distance runners. He writes about various training regimes, discusses competing theories as to why runners from the Rift Valley area have come to dominate world distance running, and provides profiles of dozens and dozens of elite runners who specialize in everything from the steeplechase to the marathon to cross country. It's a great book and one that I would recommend to anyone who enjoys running.
Near the end of the book, he talks about 15 ways to adopt a Kenyan method to your running training. For those who want to improve their trail running, I'm going to mention just a few that he emphasizes:
1. Forget about adding up weekly mileage. Just focus on the given day.
2. Do block training with non-active rest periods. Also, forget cross training on scheduled rest days. Tanser said that very, very few Kenyan runners do any cross training whatsoever.
3. Train off road. Hard asphalt and concrete contribute to impact injuries and kill speed.
4. Run for set periods of time rather than set distances (ex. do a 2-hr run rather than, say, a 13-mile run) In that context, all the high-tech toys of western running (GPS, heart rate monitors, computer graphing and charting) are not used.
5. Run in groups when possible, the idea being that groups tend to push harder, it teaches running off pace, from behind, or pace setting, etc.
6. Don't try to run through injuries.
7. Simple, lightweight, flexible shoes are preferred not because of weight, but because Kenyan coaches find that the allow for better muscle development in the feet.
8. Long hill runs can't be emphasized enough.
There is a lot more to the book and each technique is covered extensively. Give it a read if you have time -- you'll get a lot from it.