Kerr has talked quite a bit about his training on his podcast/others:
- 6 days a week with a rest day, always
- Never doubles (at least as of a few years ago)
- 2 hard workouts a week + a moderate long run
- 2 gym sessions a week (on workout days)
- Drills/strides once per week
- 60-70 mpw, winter closer to 70, race season closer to 60
Training week:
M: Easy + drills/strides
T: Workout - tempo/intervals/fartlek/hills + gym
W: Off
R: Easy
F: Workout - track specific + gym
S: Easy
Su: Long run (15-16 mi)
Few other important details I have picked up:
- Has started a 'strict' diet plan with a nutritionist (this is less common in running but normal in other pro sports)
- Sees a sports psychologist regularly, my impression is that he has nailed the inner confidence aspect of pro sports
- Afternoon naps are a regular part of his daily routine
Some thoughts:
- From what I have read, his training is very similar to Bernard Lagat's back in the day when he was training for 1500/5k (aside from the gym work).
- Hats off to Coach Mackey: he has clearly come up with a system that works for Kerr. Many pro teams are hopping on the double T band wagon (off the top of my head: On Europe, Very Nice Track Club, Tinman, etc. have all incorporated double T). Mackey on the other hand has 'stuck to his guns,' with great success. Just goes to show that double T can work, but it is not the end all be all.
- People overestimate the amount of mileage required to succeed at distances from 800 to half-marathon. Of course, the adaptive response to mileage varies from person to person, but pros like Kerr, Lagat, Brazier, Knight, etc. demonstrate that high mileage is not necessary to run at a high level. Even Bowerman have drastically lowered their mileage since the Solinsky days of 120+ Jerry miles in the early 2010s.
Finally, for training specifics: Henry Wynne, Kerr's training partner, posted all Brooks Beast workouts up until 2021-ish on Strava. Currently, Waleed Suliman is on Strava posting his training with the Beasts. Go take a look if you want workouts details.
That's about all I've got!