It really depends on the runner's prior training history.
My wife ran her first marathon in 2017. She was a lifelong exerciser, but not a dedicated runner until maybe 2010, and even then, her running was inconsistent due to the birth of our 2nd and 3rd children. Because she had no meaningful lifetime base when she first started racing 5ks and other shorter races, we kept her volume fairly low (30-35 mpw on 4-5 days) and kept her to just one workout per week in those early years of running, alternating between a tempo session one week and a track session the following week.
For her, because of her historically low volume, we cycled through weeks of 40, 45 and 50 mpw (on 5 days). We also kept her to one workout most weeks, plus a long run. Here were her quality days (not including long runs unless they included portions that were faster than easy distance pace):
Week 1: 2 up; 6 x 800m at 5k pace with 2:30 active rest; 8miles total
Week 2: 5 x 1000m at 5k pace with 3:00 active rest; 10 miles total
Week 3: 4 x 1200m at 5k pace with 3:30 active rest; 10 miles total
Week 4: 2 miles up; 3 x 1.5 miles tempo w/2:00 rest; 2.5 miles down
Week 5: 2 mi up; 4 x 1 mile at tempo pace w/1:30 rest; 10 mi easy - 16 total
Week 6:
1 mile up; 4 miles at tempo pace plus :10; 1 mile down
18 miles easy with miles 8 through 10 at marathon pace
Week 7: 5 mi up; 4 x 1 mile at tempo pace with 1:30 rest; 1 mile down
Week 8:
2 miles up; 5 x 1 mile at tempo pace w/1:30 rest; 1 miles down
12 miles at marathon pace; 17 miles total
Week 9:
1 mile up; 3 x 2 miles at tempo pace with 3:00 rest; 1 mile down
18 miles easy with miles 10 through 14 at marathon pace
Week 10:
6 miles easy; 3 x 1 mile at tempo pace w/1:30 rest; 1 miles easy
20 miles easy with last 2 miles at marathon pace
Week 11:
4 miles up; 5 x 1 mile at tempo pace w/1:30 rest; 1 miles down
2 mi up; 3 x 1 mile at tempo pace w/1:30 rest; 6 miles easy; 3 x mile at tempo pace w/1:30 rest; 2 miles down
Week 12: 1 mile easy; 5 miles at marathon pace
Week 13:
2 miles up; 20 minute tempo run; cool down for 6 miles total
13 miles at marathon pace; 17 miles total
Week 14:
2 miles up; 20 minute tempo run; cool down for 6 miles total
Week 15:
1 mile up; 4 x 1200 at tempo pace with 1:00 rest; 1 mile down
Chicago Marathon: 15 minute BQ
Note that since her T pace was between 7:20-7:30, the rest to work ratio of 5:1 was maintained by extending rest.
Also note that this isn't the 2Q or Training Plan A plan, but it applies the core principles of those plans:
- Early vo2max work
- Shift to threshold work after initial phase
- Mix in a few extended bouts at M pace
- Maintain an inverse relationship between volume and intensity
- Work the second quality session per week into your long run
- Progress the volume of T work in a steady way while mixing in when in the run T sessions come
Some other things that were included but are not really 2Q or Training Plan A inspired:
- A fair amount of shorter bouts at M pace worked into long runs and occasionally done as a stand-alone run
- A fair number of runs with an extended warm up (really a short easy distance run) preceding the cruise intervals
Both of these were concessions to her being a first-time marathoner with very little experience doing these kinds of workouts. I really think having the TLT runs - long runs with cruise intervals early and late and with a moderate distance recovery period in between - are the most important workouts in those plans. But she was simply not going able to do those the way a more experienced runner would be able to. So in an effort to derive some of the mental benefit that those workouts provide, I made sure that she got some workouts in where the cruise intervals came at the end of the run, not at the beginning. Similarly, her inexperience in running at her M pace was what incited me to add those shorter bouts throughout the cycle. Given she was only doing one heavy workout most weeks, she had a bit more "room to play" on her other days, and I thought getting her to key in on how M pace felt mechanically would give her a bit more confidence on race day that she could get the pace right.
For a more experienced runner shooting for a similar time goal, things would probably look a bit different, but the core concepts would remain the same.