Running Plan Review Buena Vida Run Club's 20-Week Advanced Marathon Training (6 days)
Plan at a Glance
For the first sixteen weeks of this build, not a single mile is run at marathon effort. That can surprise a runner who has trained for a marathon before, since rehearsing race pace early and often is a common habit. Here, the harder days sit at tempo and at the effort you could race a 5K or 10K at today. Tempo means comfortably hard, an effort you could hold for about an hour. That is where your speed gets built. Marathon effort arrives late, as practice for race-day rhythm.
The more common mistake at this level has nothing to do with the hard days. It is running the easy days a little too fast. With six runs a week, that habit adds up. When every run drifts toward moderate, the hard days lose their bite and the Saturday long runs start on tired legs. Keeping the easy running truly conversational is what lets the harder sessions count.
Buena Vida built this 20-Week Advanced Marathon Training plan for runners already covering about 32 miles a week who want their next marathon to feel stronger. It runs six days a week, adds a midweek medium-long run from the second month, and spaces four lighter weeks through the build. There is no target time. Every session is described by effort, and you meet the clock at the finish.
What follows is Buena Vida's full review of the plan. Every plan is scored against our detailed, 31-point benchmark, drawn from peer-reviewed sports-science research and proven coaching best practices.
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Our Review
A marathon build that starts 20 weeks out gives you time most runners never get, room to let the long run grow slowly. If you already run about 32 miles a week and can give 6 days to it, this plan is easy to recommend. Most of the climb to a 60-mile peak comes in small steps.
The extra weeks go into patience, not into more hard running. Your long run grows from 10 miles to 22, usually 1 mile at a time. Your tempo run, a comfortably hard effort you can sustain for most of an hour, stretches from 4 miles to 7. Every 4th week is a lighter one, so you meet each new step on legs that have caught up.
The gaps are few but real. Marathon effort stays off the calendar until the heaviest week late in the build, when 23.5 miles of it arrive at once. That week also jumps about a quarter over the cutback before it. The taper, the lighter stretch before race day, opens with a week that drops every hard session.
Best for a runner who has finished a marathon and wants 6 days of running to feel steady rather than crowded. If your race is closer than 20 weeks away, look at a shorter build. With the time and the days in hand, run this one and patch the gaps below.
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Structure
Does the plan build you up smartly?
The build moves in clear blocks, and each one hands off cleanly to the next. You spend 10 weeks on base running with repeats at 5K effort. The build phase then shifts to longer repeats at 10K effort and, late on, to marathon effort. A lighter week arrives every 4th week, and the taper runs 3 weeks.
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Prevention
Does the plan protect you from injury?
Mostly, though 2 weeks deserve care. Early on, a tempo run and 800 m repeats arrive in the same week. The heaviest week late in the build jumps about a quarter while adding 23.5 miles at marathon effort. Elsewhere the running climbs in steps of about 10% or less, and every hard session opens with an easy warm-up. Strength fills the 7th day, so 1 day each week stays free of running.
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Flexibility
What happens when you miss a day?
In a week of 6 runs, a missed easy day is the cheapest loss you can take. Protect the long run first, then the 2 hard sessions, and let an easy run go before any of them. Every session is set by effort, so a shortened week never leaves you chasing a number. If sickness or travel takes a whole week, repeat it rather than skipping ahead.
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Readiness
Will the plan deliver race-day fitness?
Largely yes, with one gap in how marathon effort is timed. Your long run reaches 22 miles and your week reaches 60, which is plenty to run a strong marathon. Marathon effort shows up only in the heaviest week and in one 3-mile run during the taper, so it never builds step by step. The taper's opening week also drops every hard session, and one short tempo run there keeps your legs used to working.
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Variety
Are the workouts varied enough?
Repeats change shape every few weeks, which keeps the hard days from blurring together. Intervals here means repeats of a set distance with easy jogs between. They move from 800 m at 5K effort through 1000 m and 1200 m to 1600 m at 10K effort. Strides, short relaxed bursts of speed, follow 17 easy runs. A midweek medium-long run joins the week from the second month.
Workouts
Every Buena Vida training plan comes with detailed coaching notes and live workout guidance. Tap any workout to preview the notes for that day.
Twenty weeks is a long runway, and today you are standing at the very start of it. Nothing this week needs proving. Every day asks only that you show up and keep the effort easy enough to talk through. Use these days to learn the shape of your week: when you run, how you sleep, and what your legs say on the fourth morning in a row. The harder running is close. For now, finding the rhythm is the whole job.
M 4.5mi Easy Run
4.5 miles easy to open twenty weeks of running. Keep it conversational from the first step and let your breathing set the speed. Six running days make for a lot of ordinary mornings, and this is the first of them. The only test today is finishing with the sense that you could run again tomorrow.
Tu 4.5mi Easy Run
4.5 miles easy, the same as yesterday. Notice how the second day in a row feels in your calves and hips. Back-to-back days are the texture of this build, and learning their feel now helps once the harder sessions start next week.
W 4.5mi Easy Run
4.5 miles easy. The third day is where easy runs tend to drift faster, simply because they feel too slow. That drift is the trap. Keep the effort where you could talk in full sentences, and save anything extra for Saturday's 10 miles.
Th 4.5mi Easy Run
4.5 miles easy on the fourth straight day. Some heaviness in your legs is normal by now, and it usually fades once you are warm. Most of a marathon build looks like this morning, and a great deal of your endurance comes from runs just like it.
F 4.5mi Easy Run
4.5 miles easy, the last run before the weekend. Tomorrow brings the first long run of the build, and it goes better on fresh legs. Give yourself permission to run today a little slower than feels necessary.
Sa 10mi Long Run
10 miles easy, the first long run of the twenty weeks. Start slower than feels necessary and keep the whole run at an effort you could chat through. This is the baseline that every later Saturday grows from, all the way to the biggest one near the end. In the last few miles, notice whether the effort creeps up while your speed stays the same. That drift is normal this early, and it is one of the things these Saturdays train. Finish feeling like you had a couple more miles in you.
Su Strength Training
The work gets real now. Two days carry genuine effort, and the rest of the week has to make room for them. You may feel awkward on the first hard day, unsure how hard is hard enough, and that uncertainty is normal. Nobody finds the right effort perfectly the first time. Pay attention, jot down how it felt if that helps, and let the easy days stay truly easy around it. There is a long way to go, so no single day needs winning.
M 7mi Tempo Run with 4mi @ Tempo
Warm up 1.5 miles, run 4 miles at tempo, and cool down 1.5 miles. Tempo is the effort you could hold for about an hour, hard enough that talking comes in short phrases. This is the first harder session of the plan, and Monday tempo becomes a fixture from here. The usual first-tempo mistake is running the opening mile like the start of a race. Find the effort by the end of that mile and hold it steady. It went right if the last mile felt like the first, only harder to keep.
Tu 3mi Easy Run
3 miles easy, the morning after your first tempo. Your legs may feel a little flat, and that is expected after holding hard effort for 4 miles. Keep this short run truly easy so yesterday has a chance to sink in. Pairing a hard day with an easy one is what lets you run six days without wearing down.
W 4mi Easy Run
4 miles easy in the middle of the week, with repeats coming tomorrow. Check in with your form as you go: loose shoulders, relaxed hands, and feet striking under your hips. Small habits like these carry weight on the thousands of steps a marathon takes.
Th Intervals: 6×800m @ 5k
Warm up 1.5 miles, then run 6 by 800 meters at 5K effort with 400 meters of easy jogging between, and cool down 1.5 miles. 5K effort is the effort you could race a 5K at today: hard, rhythmic, and controlled. Along with Monday's tempo, these repeats do the real work of raising your ceiling this build. The first two reps usually go out too fast because everything feels fresh. Run them at a speed you could repeat six times, and let the last two tell you whether you judged it right. Keep the jog slow enough to get your breathing back.
F 3mi Easy Run
3 miles easy between yesterday's repeats and the weekend. Saturday's 11 miles comes next, so keep this short and slow enough that it barely registers. You have permission to run this slower than any easy day so far, since its whole purpose is getting you to the weekend in good shape.
Sa 11mi Long Run
11 miles easy, one more than last Saturday. After a week with two harder days, this is the first long run on tired legs, so expect it to feel heavier than week 1. Keep the effort conversational and let the pace fall where it falls. Running long on some fatigue is a skill this build asks for right up to race day.
Su Strength Training
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All 20 weeks in the app
Daily coaching notes, nutrition guidance, reschedule logic, and strength placement.
Plan Strengths
- By the 22-mile long run, 20 miles already feels familiar, since you run that distance twice on the way up.
- Every 4th week hands your legs a breather of short recovery runs, and most runners start the next climb feeling fresher.
- Steady growth in the tempo run, from 4 miles to 7 in half-mile steps, means no single session feels like a leap.
- You'll start each tempo or repeat session on legs rested by an easy day, since hard days never sit back to back.
Weaknesses & Gaps
- The heaviest week can leave your legs flat, since 23.5 miles at marathon effort arrive there at once on a big jump.
- Race rhythm can slip in the taper's opening week, which drops every hard session after 2 a week through the build.
- You're on your own for strength, since the calendar holds 1 session a week and never says what to put in it.
- Early on, a jolt can come when the tempo run and 800 m repeats both join the week together.
What's missing
Three gaps need your own fix, and each one is simple. Marathon effort shows up only late, so add 3 to 4 miles of it inside two of the 19 or 20 mile long runs. Then the heaviest week is not where you meet it. In that week, if the second midweek marathon-effort run leaves you flat, swap it for your usual tempo run. The taper's opening week has no hard session, and a short tempo run or a few 1000 m repeats there keep your legs used to faster running. What goes inside the weekly strength session is best planned with a coach or a physical therapist.
What the science supports
Long runs are essential for the marathon
Long runs that build over months teach your legs things that shorter, faster sessions cannot, and a marathon leans on them. This plan takes its time with that build. Your long run starts at 10 miles and grows mostly a mile at a time to 19, then to 20, which you run twice. It tops out at 22 miles, 3 weeks before race day, with a lighter week before it.
Toresdahl et al. 2021; Jones & Kirby 2025; Casado et al. 2019
Individualized plans beat one-size-fits-all
Training that adjusts to the runner tends to match or beat a fixed, one-size-fits-all plan. The average edge is modest, and the clearest gain is fewer runners who stall. This plan sets every hard session by effort rather than by a number from a table. Tempo, 5K effort, 10K effort, and marathon effort all scale to how fit you are that day, so the same session fits a strong week and a tired one.
Nuuttila et al. 2022; Vesterinen et al. 2016; Javaloyes et al. 2019
Tendons adapt slower than muscle
Tendons get stiffer and stronger with running, but they change more slowly than muscles do, over months rather than weeks. A 20-week build gives them that time. You climb from about 32 miles a week to 60 in steps of about 10% or less, apart from the weeks after each cutback. Your legs meet the heaviest running about 4 months in, after the slow parts have had a long runway.
Werkhausen et al. 2019; Marqueti et al. 2019; Devaprakash et al. 2020
Easy miles do most of the work
Easy running makes up most of a trained runner's week, and it carries the harder sessions on top of it. About 4 of every 5 miles in this plan are easy. That includes a midweek medium-long run that grows to 9.5 miles. Only 2 sessions a week are hard. So 6 days of running add up to 60 miles without the whole week turning into hard work.
Haugen et al. 2022; Casado et al. 2022; Tønnessen et al. 2014
Recovery weeks turn training into fitness
A lighter week every few weeks lets tiredness clear so the work you have done can sink in, and runners who take one tend to stay healthier. This plan steps back every 4th week before the taper. Those weeks trim the running by about a fifth and swap the hard days for short recovery runs. The long run comes down too, so you start the next climb on fresher legs.
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