I read everything I could find on Kenyan running philosophy and training. I found a lot of good information and started to map out a plan. Based on my research, these were some key take-aways:
*Take rest days when your body says it's time - no matter what the schedule says, if you need a day off, take it.
*Run only six days a week. Most of the Kenyans take one day off; usually Sunday.
*Make tempo and hill running the twin pillars of your approach. Start slow, finish fast.
*Stroll your slow days if you feel like it. Or go out walking after a race or hard run. Use walking as a way to "soften" the muscles.
*Do "drills" after each run.
*Run barefoot as much as possible.
*Vary pace, very much on your various runs. Some vary pace by as much as 3 minutes. This great disparity in intensity level from run to run is common. To Kenyans, every run has a specific purpose, usually expressed in terms of "easy," "medium/average" or "high" speed. When it's time to go easy, such as the run before or after a "high" session, Kenyans have no qualms about doing nothing more than a glorified trot. This low-intensity, active recovery allows them to still get in volume while leaving them ready to really nail the next hard workout. Most recreational runners, in contrast, run too hard on their easy days and carry around too much residual fatigue to hit the times they're capable of in quality sessions (THIS WAS ME). To reach your racing potential, follow the Kenyans-easy runs easier, harder runs faster.
So applying that to me, 6:30 is my race pace for 5k to half marathon. I decided to continue running 6 out of 7 days but only 1 hard day, 1 medium/average day, and 4 easy days. All easy runs are between 8:30 - 9:30, the medium run is no faster 7:30 - 8:30 and the hard run is no faster 6:45. Using the start slow, finish fast approach, my hard and medium run is a progressive tempo in 10-15 min. stages.
For example, today I did a medium run consisting of 15 minute warm-up on the treadmill barefoot, no faster than 9:30, then put on the racing shoes and did 10 min. at 9:30, 10 min. at 8:30, and 10 min. at 8:00. For my hard run, it will be the same approach but ramp down to 10-15 min. at 6:45 - 7:00 (I see no reason to run my race pace because if I'm training within :30 per mile, the adrenalin of the race will make up the delta and many Kenyans do not train at race pace put get close and continue to extend the distance but not the pace per se). For my easy runs, I haven't run faster than 9:00 and many easy runs in the 9:30-9:45 range (by the way, I'm loving the slow runs because it's a great opportunity to really concentrate on form and technique).
Right now, I feel very strong which is saying a lot since I was on crutches with PF 3 weeks ago and now I feel like I'm close to 100%. This approach is keeping me pretty fresh and the key is the easy run being very easy (I don't do short intervals anymore). Obviously, starting back with barefoot running as part of the training was been a huge benefit as barefoot running is the key to my form and technique which I must transfer to shoes. I make sure that I get at least 15 min. of barefoot running every day and I try to get 1 day of 4-5 miles of either barefoot or VFFs (a "no shoe" day). On a percentage basis, each week barefoot (or VFF or water socks) running accounts for about 40% of my running. I still use my Mizuno Wave Universe 3's as my racing shoe of choice (unless the Kuusa or Evo replaces it).
I've read that, on a scale of 1-10, the hard run should be a 8, the medium run a 6 and the easy runs 4-5. In other words, even after a hard run, you should not be totally drained.
Here's a few good sources you should check out:
http://njsportsmed.com/Hot_Topics_Kenyan_Running.html
http://www.runningwarehouse.com/LearningCenter/TrainKenyan.html
Give it a try.
HHH