Why do almost all of these schedules have anaerobic workouts from the beginning of the schedule, 18 or even more weeks out?
Make sure you don’t classify a tempo/LT/AT run as an anaerobic workout. Those are still considered aerobic workouts. I made this mistake the first time I read the Lydiard article. Therefore if you look at Advanced Marathoning, you’ll see tempo/LT/AT runs like 16-18 weeks out, but you won’t see anaerobic workouts until 8-10 weeks out.
Hope that helps.