Running Plan Review Buena Vida Run Club's 18-Week Advanced Marathon Training (6 days)
Plan at a Glance
Seven runs in this build reach 20 miles or more, and six of them ask for nothing faster than an easy, conversational effort. That can surprise an experienced marathoner who expects a big plan to feel hard every day. Long runs teach your body to keep moving for hours, and they do that best when they stay easy enough to talk through.
A second or third marathon often goes wrong in training, long before race day. Easy days drift a little too fast, long runs turn into tests, and the runner reaches the start line already tired. Here the hard running lives on two midweek days. Most weeks, those are tempo runs: comfortably hard, like an effort you could hold for about an hour. Some weeks swap one for shorter repeats at 5K or 10K effort. Marathon effort appears only late, as practice for race-day rhythm. Everything else stays easy, so you arrive at the hard days ready for them.
Buena Vida built this 18-week plan for runners already covering around 44 miles a week. You run six days a week, with one strength session on the calendar and a peak near 60 miles. It runs on effort from start to finish instead of a target time. You race by feel and find out what the clock says at the end.
Our full review of the plan follows. We grade every plan on the same 31-point benchmark, with each measure drawn from peer-reviewed sports-science research and proven coaching best practices.
Similar plans
Our Review
Most runners who come back for another marathon already know they can finish one. What they want now is a race that still feels like theirs in the closing 6 miles. If you already run about 44 miles a week and can give it 6 days, these 18 weeks are a strong way there.
The extra weeks buy repetition, not a bigger peak. You'll spend 5 weeks at full marathon rhythm before the build begins, then meet the 20-mile long run so often that it turns into a normal Sunday. Tempo, running that feels hard but stays under control, grows in half-mile steps from 4 miles to 8.5. A lighter week every 4 or 5 weeks lets your legs catch up, so each new step starts fresh.
The gaps are few. The weekly strength session, your 1 day each week away from running, comes with no guidance. Late in the build, 7 long runs of 20 miles or more fall inside 8 weeks, 4 of them in a row. Marathon effort shows up only in the closing month, and race week holds nothing faster than easy running.
Choose this plan if 44 miles a week already feels ordinary and you want the next marathon to feel stronger from start to finish. If 60 miles still sounds like a lot, a lighter build will treat you better. With the base in place and 18 weeks on the calendar, this is the build to run.
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Structure
Does the plan build you up smartly?
Each of the 4 phases changes what the hard days ask of you, so the build keeps moving without lurching. Base opens with 2 tempo days a week at full rhythm, and a lighter week follows every 4 to 5 weeks throughout. The build mixes in repeats at 5K and 10K effort and a fartlek, 10 stretches at tempo effort with easy running between. Sharpen adds marathon effort. The taper, a lighter stretch before race day, then trims the running across the closing 2 weeks.
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Prevention
Does the plan protect you from injury?
Mostly, with a gap in how the long runs stack. Late in the build, 4 long runs of 20 miles or more come back to back, and trimming one to 18 costs little. Coming out of one cutback, the weekly total jumps just as the fartlek appears, so run that fartlek a notch easier. Otherwise the climb is careful, and every hard session starts with a warm-up.
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Flexibility
What happens when you miss a day?
6 running days give a lost run room to be absorbed, as long as you know which days carry the week. Protect the 2 hard sessions and the long run, and let an easy run go first. Every workout carries a priority, so the choice is already made for you on a busy day. If illness takes most of a week, repeat that week rather than jumping ahead to the next long run. Beyond that, the reshuffling is yours.
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Readiness
Will the plan deliver race-day fitness?
It will, though marathon effort arrives late. You'll reach the start line with 7 long runs of 20 miles or more, a 22-miler at the top, and tempo stretched to 8.5 miles. Marathon effort waits for the closing month, and race week holds only easy running and a short shake-out. Adding 3 miles at marathon effort to a mid-build long run gives that rhythm more time to feel familiar. A couple of miles at that effort early in race week keeps it fresh.
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Variety
Are the workouts varied enough?
Variety comes from the second hard day, which rotates through 5 kinds of repeats and a fartlek while tempo holds the other slot. You'll run 800 m and 1000 m repeats at 5K effort, 1200 m and 1600 m repeats at 10K effort, and mile repeats at marathon effort. Two steady runs at marathon effort, and 6 miles of it inside a 20-miler, join them in Sharpen. Strides, short relaxed bursts of speed, finish 15 easy runs. Even the gentle days carry a little speed.
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.
Welcome to the start of a long build. You are beginning from a base that already carries real mileage, so nothing here starts from zero. The first days are mostly about rhythm: learning where the running fits in your mornings or evenings, and where it rubs against everything else. Expect this stretch to feel busy more than hard. Sort out the small logistics now, from shoes to sleep to the route you can run half-awake. The heavier weeks later go better when those questions already have answers.
M 4mi Easy Run
Run 4 miles easy to open the build. Keep it conversational, loose enough to chat the whole way. This first run sets the tone for eighteen weeks, and the tone you want is unhurried. Notice how your legs feel today. Months from now, this distance will feel like a warm-up, and it helps to remember where it started.
Tu 7mi Tempo Run with 4mi @ Tempo
Warm up 1.5 miles, run 4 miles at tempo, and cool down 1.5 miles. Tempo is comfortably hard: the effort you could hold for about an hour, speaking only in short phrases. This first one is a calibration, so start the block a little under where you think it belongs. It went right if the last mile of tempo feels as controlled as the first. Tempo carries much of the job of making marathon effort feel easier later, which is why it appears twice this week.
W 4.5mi Easy Run
Run 4.5 miles easy the day after your first tempo. Some stiffness in the calves or hamstrings is normal, and it usually loosens by the second mile. Keep the effort fully conversational. Tomorrow brings a second tempo, so today's job is to hand those legs over in good shape.
Th 7mi Tempo Run with 4mi @ Tempo
Start with 1.5 miles easy, run 4 miles at tempo, and finish with 1.5 miles easy. This is the first time you stack two tempo days in one week, and it is the backbone of this build. Your legs may start the block a bit heavier than they did on Tuesday. Find the same comfortably hard rhythm and hold it, even if it takes a mile to arrive. A tempo on slightly tired legs is a small preview of what the second half of a marathon asks for.
F Strength Training
Sa 7mi Easy Run
Run 7 miles easy. Tomorrow brings the first long run, so keep today relaxed from start to finish. Back-to-back days like this teach your legs to run well when they are not fully rested. The trap is treating a mid-length easy day as a chance to prove something before a bigger one.
Su 14mi Long Run
Run 14 miles easy, the first long run of the build. Start slower than feels necessary, and keep the effort conversational for every mile. Think of it as a check-in more than a test: how your stomach, feet, and legs handle the distance. Practice drinking and taking fuel the way your nutrition plan sets out. Around mile 10, notice whether your form is holding or starting to fold. That observation matters more today than any split, and it becomes the first entry in a record you keep all build.
Somewhere in these days you may notice that the tiredness from one run is still there when the next one starts. That overlap is what marathon training feels like from the inside, and it means the work is getting real. You do not need to love it or fight it. Keep the easy running truly easy so the harder days have something to draw on. Sleep is the one lever that pays back more than it costs right now, so protect it wherever you can.
M 4mi Easy Run
Run 4 miles easy the morning after your first long run. Yesterday's miles are still in your hips and calves, so let the opening mile be as slow as it needs to be. A gentle Monday is what makes Tuesday possible, and it sets the week up well.
Tu 7.5mi Tempo Run with 4.5mi @ Tempo
Jog 1.5 miles to warm up, hold 4.5 miles at tempo, and cool down 1.5 miles. The tempo block is half a mile longer than last week. The extra distance shows up in the final stretch, where holding rhythm takes more attention than holding speed. Keep your breathing steady and the effort comfortably hard. It went well if you finish the block with a little left. Growing tempo slowly like this is how a marathon's steady middle starts to feel within reach.
W 5mi Easy Run
Run 5 miles easy between two tempo days. Your job is to be the gap: easy enough that Thursday gets a runner with some spring left. Notice your breathing. If you can hold a steady conversation, the effort is right, and anything quicker borrows from tomorrow.
Th 7.5mi Tempo Run with 4.5mi @ Tempo
Warm up over 1.5 miles, then run 4.5 miles at tempo before a 1.5-mile cool-down. The second tempo of a week tends to feel harder than the first, even at the same effort. That gap is normal. Run by feel instead of chasing Tuesday's rhythm, and accept that comfortably hard may look a little slower today. What this builds is the ability to keep a steady effort on legs that are not fresh, which is most of what late marathon miles ask.
F Strength Training
Sa 7mi Easy Run
Run 7 miles easy. Tomorrow's long run is 15 miles, so start this one slow enough that it feels almost lazy. Saturday runs in this build tire the legs a little, which makes Sunday feel closer to the later miles of a marathon. You have permission to run this slower than your usual easy.
Su 15mi Long Run
Run 15 miles easy. It is one mile longer than last week, so keep the start patient and the effort conversational. Coming off yesterday's 7 miles, your legs may feel flat early and loosen later. That pattern is exactly what a marathon build trains: running better as the miles go on.
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Plan Strengths
- On race morning, marathon effort already has a feel, after a 20-miler with 6 miles at it and a 10-mile run holding 7.
- An 8.5-mile tempo near the end feels within reach, because it grew in half-mile steps from 4.
- No two hard days touch, so you reach each one with legs ready to work rather than still carrying the last.
- Coming out of each of the 4 lighter weeks, your legs feel springy again before the next climb begins.
- Strides, short relaxed bursts of speed, close 15 easy runs and keep your legs feeling quick between the long days.
Weaknesses & Gaps
- You're on your own for the weekly strength session, which sits on the calendar with nothing said about what to do.
- Fatigue can pile up late, when 7 runs of 20 miles or more fall inside 8 weeks, 4 in a row.
- With marathon effort held back to the closing month, race rhythm gets less practice than it could.
- There is never a week with only 1 hard session, even in cutbacks, so easy days make up a smaller share of your runs.
What's missing
The plan leaves 4 things for you to handle. The strength session itself comes with no guidance, so bring a routine you already know or ask a coach for one. When the 20-mile runs come back to back late in the build, cut one of them to 18 miles if your legs still feel flat by Thursday. Marathon effort waits for the closing month. Add 3 miles of it to the back half of a mid-build long run, so race rhythm has longer to feel familiar. Race week holds nothing faster than easy running. A couple of miles at marathon effort early that week keeps the rhythm fresh for race morning.
What the science supports
A taper makes you 2-6% faster on race day
A planned cutback in the closing weeks before a marathon helps most trained runners race 2 to 6 percent better than holding their training steady. This plan asks you to come down from 60 miles at the top to 41.5 in the next-to-last week and 36.7 in race week. A 6-mile marathon-effort run and a 4-mile tempo stay in along the way. Less running with some faster touches kept is the pattern the research supports.
Start at the mileage you already run, not the peak
A plan should start at the mileage you already run, not at the number it builds toward. Here the opening week comes in at 43.5 miles against a stated starting point of about 44. The early days feel like a normal week rather than a reach. From there the climb to 60 miles takes most of the build, and no week rises more than about 10 percent outside a return from a cutback.
Nuuttila et al. 2022; Roberson et al. 2018; Ramskov et al. 2018
Threshold speed is built by running
The effort where comfortable running tips into hard running moves up when you train it by running at it. Tempo runs do that job here. They grow from 4 miles to 8.5 in small steps across the plan. Because you meet that effort twice in most weeks, the change happens in the exact activity you will race in, with no cross-training standing in for it.
Varied intensity beats a steady moderate pace
Mixing easy running with clearly hard sessions builds endurance better than running most days at a steady, medium-hard effort. This plan keeps that line clear. Around the tempo days, you'll run repeats of 800 m to 1600 m at 5K and 10K effort, plus a fartlek of 10 hard stretches with easy running between. The rest of the week stays easy enough to talk through.
Stöggl & Sperlich 2014; Rosenblat et al. 2019; Casado et al. 2022
Higher weekly mileage lowers injury risk
Higher weekly mileage, built up gradually, is linked to fewer injuries rather than more. This plan climbs from about 44 miles a week to a 60-mile top over 11 weeks, with a lighter week every 4 to 5 weeks along the way. That patience matters more than the peak itself. It lets a sixth running day add miles your body can keep up with.
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