Running Plan Review Buena Vida Run Club's 18-Week Run a Faster Marathon (4 days)
Plan at a Glance
A marathon build tends to run into the rest of life somewhere in the second month. Work gets busy, a weekend fills up, and the long run gets squeezed or skipped. Four running days a week leave space for that. Each run has a clear job, and the other days stay open for rest and everything else you care about.
The marathon asks more of your week than any shorter race. The long run grows until it takes up most of a morning. The easy days between the hard ones matter just as much, because that is when your body recovers. A common way to stall is to squeeze in more running than your week can hold. Those extra miles get paid for with lost sleep and tired legs.
Buena Vida built this plan for runners who already run about 22 miles a week and want their next marathon to feel stronger. It lasts 18 weeks, with four runs a week. There is no target time. Most Tuesdays bring a tempo run, which means comfortably hard, an effort you could hold for about an hour. Most Thursdays bring faster repeats at the effort you could race a 5K or 10K at today. You run by feel, and the clock is something you look at when you finish.
Here is Buena Vida's full review of the plan. We measure every plan against our detailed, 31-point benchmark. Each standard is drawn from peer-reviewed sports-science research and proven coaching best practices.
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Our Review
Most runners who want a stronger marathon don't have a fifth or sixth morning to give it. 18 weeks on 4 days is a patient answer to that. You get 9 weeks of steady building before the hardest running begins, time for a runner at 22 miles a week to grow into 38. It is a strong plan with small gaps.
The idea underneath is that 4 runs can carry a marathon build when each one keeps its own job. Tuesday is tempo, a comfortably hard effort you could sustain for close to an hour. Thursday brings repeats at roughly the effort of a 5K or 10K race. Saturday is the long run, climbing from 10 miles to 20 in steps. The one easy run between the hard days is what lets them stay hard. It often ends with strides (short, relaxed bursts of speed). Marathon effort shows up late, as a rehearsal of race rhythm.
The gaps are light. About 1 run in 3 is hard, and you'll feel that on the easy day. At the peak, the 19 and 20 mile long runs carry more than half the week. Coming out of each cutback, the week also steps past where it left off. Strength sits on the calendar twice a week with the content left to you.
Best for a runner already near 22 miles a week who wants the next marathon to feel stronger and can protect a Saturday morning. If your Saturdays are unreliable, look for a fifth day to share the long run's weight. For a 4-day week with room to grow, run this one.
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Structure
Does the plan build you up smartly?
The build is patient where it counts. A 9-week opening phase grows your week from 22.5 miles to about 33 before the harder build starts. Every fourth week is a cutback, a lighter week that lets your legs catch up. Long runs climb in steps of 1 to 3 miles, and the 20-mile peak sits 3 weeks before race day. Then comes a 3-week taper (the lighter stretch that leaves you fresh).
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Prevention
Does the plan protect you from injury?
Small weekly steps and a warm-up on every hard day keep the risk low. No build week rises more than about 5% over the one before. Each tempo and repeat session opens and closes with 1 mile easy, and strength appears twice a week, never on a hard day. The soft spots are the week after each cutback, which steps above the week before the break, and the opening fortnight, which brings tempo and repeats in together. Ease into those weeks if your legs complain.
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Flexibility
What happens when you miss a day?
Lose a weekday easy run and the week barely notices. Protect the Saturday long run first, then the tempo and the repeats, and drop the easy run before any of them. When you move a hard session, keep a day between it and the next hard one. If illness or travel takes a whole week, repeat that week rather than jumping ahead. Beyond that, the reshuffling is yours.
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Readiness
Will the plan deliver race-day fitness?
Mostly, though race effort arrives late. Long runs reach 19 and 20 miles, and the 20-mile run carries 6 miles at marathon effort as a rehearsal. Marathon-effort sessions come only in the last stretch of the build, about 19.5 miles in all, and the first taper week has no harder run. To bridge it, finish a mid-build long run with 2 to 3 miles at marathon effort. Keep one short tempo in that first taper week.
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Variety
Are the workouts varied enough?
Across the plan, you'll meet 18 different harder sessions, so few Thursdays feel like a repeat. Repeats run from 800 meters to 1600 meters at 5K or 10K effort, and the tempo block grows from 2.5 miles to 4.5. A surge fartlek (speed play, with faster bursts dropped into easy running) breaks up the end of the opening phase. Marathon-effort runs join late, and strides on most easy days add a fast touch without costing a hard day.
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.
This is the beginning, and a beginning only happens once. Choosing another marathon means choosing months of ordinary weekdays that slowly add up to something, and you just made that choice. The first days should feel easy, almost too easy, and that is on purpose. Let your legs find the rhythm of running days and the rest between them. There is no clock to answer to here, only the effort you bring and how it feels. Pay attention to how you feel at the end of each run, because that feeling is where everything else grows from.
M Strength Training
Tu 4mi Easy Run
4 miles easy to open the plan. Run at a conversational effort, where full sentences come without any gasping. You are allowed to finish feeling like you could have done more. Eighteen weeks from now, this first gentle run will be hard to remember, and that is how a good start usually goes.
W 4mi Easy Run
4 miles easy, the day after your first run. Some stiffness on back-to-back days is normal and usually fades within the first mile. Keep the effort conversational. A short weekday run like this is most of what marathon training looks like, and it counts as much as any Saturday.
Th 4.5mi Easy Run
4.5 miles easy to finish the first set of weekday runs. The trap on a third day in a row is drifting faster because you feel good. A keen first week that turns into a tired third week is a familiar story in marathon training. Keep the effort down and save the energy for Saturday.
F Strength Training
Sa 10mi Long Run
10 miles easy for your first long run. Keep the whole thing conversational from the first step to the last, and take a short walk at a water stop if it helps. This Saturday run is the backbone of marathon training, the day that teaches your legs to keep going as the miles pile up. Notice where the run starts to feel like work, which is often somewhere in the last third. That spot will move further out over the coming weeks as this run stretches well beyond today's distance.
Su Rest
Something shifts now. The runs start asking for real effort, and you may notice a flicker of nerves before you head out the door. That is a fair response to harder work, and it usually fades once you are moving. You do not need to prove anything to anyone in these first harder days. Do what each day asks, finish feeling like you had a little left, and let the easier days soak it up. The work is getting real, and you are meeting it at the right size.
M Strength Training
Tu 4.5mi Tempo Run with 2.5mi @ Tempo
Warm up 1 mile, run 2.5 miles at tempo, and cool down 1 mile. Tempo means comfortably hard: the effort you could hold for about an hour, breathing hard enough that you can speak only in short phrases. It is one of the main ways a marathoner gets stronger at holding a steady effort. Expect your breathing to deepen and find a regular rhythm within the first few minutes of the tempo block. It went right if you finished at the same effort you started with and could have kept going a little longer. New efforts often feel bigger the night before than they do on the road.
W 3mi Easy Run
3 miles easy, the day after your first tempo. Legs that feel a little flat today are normal and usually loosen as you go. Keep this truly easy, slower than feels necessary. A day after a hard session often tempts runners to squeeze in more, and it is the day that most often decides how Thursday goes.
Th Intervals: 5×800m @ 5k
Warm up 1 mile, run 5 by 800 meters at 5K effort with 400 meters of easy jogging between, then cool down 1 mile. Intervals are short, hard repeats with easy jogging to recover. 5K effort is the effort you could race a 5K at today, hard and controlled, with heavy breathing by the end of each rep. This session tests whether you can spread a hard effort evenly, so aim for the fifth rep to feel like the first. Coaches see the same first-interval mistake again and again: a fast opening rep that costs the rest of the session. Start the first one a touch easier than you want to.
F Strength Training
Sa 11mi Long Run
11 miles easy, a small step longer than last Saturday's run. Keep it conversational, even two days after Thursday's repeats. A long run in the same week as your first harder sessions builds the habit of running steady on legs that are not fresh. It does not need to be dramatic. Most long runs are not, and that ordinariness is what lets the next one grow.
Su Rest
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Plan Strengths
- You'll reach the 19-mile long runs with 9 weeks of steady building behind you, so the distance meets legs that have had time to prepare.
- Late in the build, the 20-mile run lets you rehearse 6 miles at marathon effort on legs that are already tired.
- A tempo block you can feel growing, from 2.5 miles of comfortably hard running to 4.5 by the end of the build.
- Every fourth week eases off, and most runners come out of those cutbacks with fresher legs for the next step.
- Strides after most easy runs keep your legs used to moving quickly without adding another hard day to a 4-day week.
Weaknesses & Gaps
- Tired legs can pile up, because 2 of your 4 runs are hard most weeks and only 1 short run stays easy.
- A missed Saturday hurts more here, since at the peak one long run carries more than half of your weekly miles.
- You'll get only a few marathon-effort sessions, all late in the build, so race rhythm has little time to settle.
- Coming out of each cutback, the week jumps past where it left off, which can leave your legs heavy for several days.
- Strength is scheduled twice a week, but what happens in those sessions is left entirely to you.
What's missing
You can bridge 4 gaps on your own. Race effort arrives late. Once or twice mid-build, finish a long run with 2 to 3 miles at marathon effort to learn its rhythm sooner. The first taper week drops every harder run, and a short tempo of about 2.5 miles early in that week keeps some speed in your legs. In the biggest weeks, the long run carries more than half the load. An optional fifth day of 3 to 4 easy miles spreads it out if your schedule allows. Strength is on the calendar with no content. Bring a routine you already know or get one from a coach or physical therapist, and keep it off your hard days.
What the science supports
Strides and sprints make you more efficient
Short, fast efforts like strides help distance runners spend less energy at a given speed, a trait coaches call running economy. Trials found gains of 3 to 8 percent over 6 to 9 weeks, mostly in runners aged 18 to 30. In this plan, 4 strides of about 100 meters follow most midweek easy runs from early on through the taper. You get a fast touch nearly every week without adding a hard day.
Paavolainen et al. 1999; Turner et al. 2003; Eihara et al. 2022
Varied intensity beats a steady moderate pace
Mixing easy running with clearly hard sessions builds endurance better than a steady diet of medium-hard running, and the finding holds from recreational to well-trained runners. This plan keeps that line clear. The Tuesday tempo and the Thursday repeats at 5K or 10K effort are the hard days. A surge fartlek adds a different kind of hard late in the opening phase. The long run and the midweek run stay conversational.
Stöggl & Sperlich 2014; Rosenblat et al. 2019; Casado et al. 2022
Long runs are essential for the marathon
Long runs are the one session a marathon build can't replace with shorter, faster work. Runs past about 90 minutes teach your legs to keep going as the hours stack up. Here the Saturday long run climbs from 10 miles to 20 in steps, with 2 runs of 19 miles before the 20-mile peak. You spend several mornings at the distances that most resemble the back half of race day.
Toresdahl et al. 2021; Jones & Kirby 2025; Casado et al. 2019
Recovery weeks turn training into fitness
A lighter week every few weeks lets fatigue clear so the body can absorb recent training. In one trial, recreational runners who stepped back this way stayed healthier than those who kept adding miles. This plan eases off every fourth week through the build, trimming the week by roughly 15 to 20 percent. The long run shortens too, so you start the next climb on fresher legs.
Recreational marathon pace sits below threshold
For most everyday marathoners, race effort sits well below the point where running tips from easy into hard, so marathon-effort runs don't do what tempo does. This plan puts the tempo run, comfortably hard for close to an hour, at the center of most weeks. It keeps marathon effort to a few rehearsals late in the build, including 6 miles inside the 20-mile long run.
Jones et al. 2021; Pierce et al. 1990; Smyth & Muniz-Pumares 2020
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