I would like to point out, that both Lydiard and Seb coe base training examples.
Lydiard liked to hit 100 mile, but only held that for like 4-6 wks before volume started to drop. And drop it did…
Coe guys, typically only hit 100km Max, again, only for short periods.
Lydiard seems known as long slow distance, which is total B.S. Even in them 100 mile Weeks, it was more, long n fast. Plus they always ran Sprint sessions once every week.
I’m personally a fan of interval based work.
One can still do a pure aerobic workload interval set, eg Tempo and many other plans.
But there are certain principles involved I’m sure they all follow.
100km week is still a lot. ESP if you have one or two days off a week.
Plus, I have seen programs, where easy recovery runs are Not included in weekly training totals.
I personally use time taken during the week.
Eg, On a deload week, 3hrs total
Normal week, 4 - 4.5 hrs
In base, I try to reach 10hrs, but only really managed 7-8 hrs.
Mostly because, 50% of my training is running circuits (push ups, sit ups etc) included
Compare this to typical runners, I can run at about 14-15 km hr for a 1hr + jog.
So at 10hrs, that’s the same as 140-150 km over 10hrs.
So, 5hrs is similar to 70 ish km. (but due to stopping for reps or push ups etc, I’m only hitting 40ish km wk ATM.
I’m just showing examples of what can be seen.
Sure lagat as you say does about 1/3 rd less volume in km or miles, but, time in training would possibly be the similar.
To note, I’m not that familiar with his actual training.
I do know a crap load if Coe n Lydiard and what I do. (but I’m no world beater…)
Just like Charlie has certain Principles to develop a sprinter, and most sprinters programs can be totally different due to strength and weaknesses and other reasons.
Same with principles of endurance.
Please note, these are just my observations from afar.
I like looking at others programs and finding certain similar principles. Or a new completely different program (that works on more than just one, but on plenty, like Charlies)