This is from Kenny Moore's training, former Oregon runner, who came in fourth in the 1972 Olympic Marathon (PR 2:11):
Training Plan Basic cycle of three hard workouts ( one long run, one short - interval workout, one long interval workout or pace run workout) followed b, taking care to do sufficient easy days after each for FULL recovery. Cycle was longer than one week.
Sample one week Run in Norway during August 1972 while preparing for the Munich OG 96 miles
Su 30 miles in 3:03 over hilly terrain, smooth largelyunpaved roads
M AM 3 mile jog PM 3 mile jog, stretching
TU AM 3 mile jog PM 3 mile jog, stretching
W AM 3 mile jog PM 16 x 330 1st 15 in 45s last in 42s 100 jog in 60s, for recovery, 5 mile easy run, 4 x 100 strides @ 7/8 effort
H AM 3 mile jog PM 3 mile jog, 20 pull ups
F aAM 3 MILE JOG PM 3mile jog
S AM 3 mile jog PM 8 x 1200m in 3:21 ( last one in 3: 12)400 JOG RECOVERY, 5 mile easy run, 4 x 100 strides @7/8 effort effort
Favorite workoutFavorite and "most valuable' might well be at odds. I loved the 30 to 35 miles runswith all my perverse soul. The most valuable is hard to pick, because ALL the bases ( speed, endurance, threshold building) had to be touched.
You look at this and think how in the world could he be that good with so many easy days. But some guys need more easy days, truly easy days, than others. And for many runners, although not all, they improve when the easy days are really easy, and the hard days really hard (of course, what matters is what the hard days look like, and what worked for Moore wouldn't necessarily work for anyone else).