Running Plan Review Buena Vida Run Club's 12-Week Sub-1:45 Half Marathon (6 days)
Plan at a Glance
The sixth day is the whole argument. Most half-marathon plans top out at five running days because the sixth day is where injuries collect and motivation thins. This plan earns the extra day by spending it on a Sunday medium-long run that sits on tired legs from Saturday's long, not by adding another easy shakeout.
Sub-1:45 over the half is an 7:57 per mile race for thirteen miles. The training problem at that level isn't speed (you have it) and isn't aerobic base (you mostly have that too). It's holding goal pace past mile nine when your legs are no longer fresh. Advanced half plans usually solve that with longer threshold tempos. The 12-Week Sub-1:45 Half Marathon solves it with the back-to-back long-run stack.
Buena Vida built this for runners moving up from four or five running days a week, with a sub-1:45 goal already plausible from current fitness. Twelve weeks, peak volume near 60 miles in week 9, a 16-mile long with an 11-mile medium-long the next morning. Two real cutback weeks at 4 and 8 carry the build. Friday is reserved for strength, but the routine itself is left to the runner.
Below is the full Buena Vida review. Every plan is held to the same detailed, 31-point benchmark, with each measure traced back to peer-reviewed sports-science research and proven coaching best practices.
Similar plans
Our Review
If a 5-day plan has stopped moving you and the question is whether a sixth day actually pays back, this is the answer for sub-1:45. The sixth day is a medium-long run on Sunday, sitting on the back of Saturday's long. That's where the gain lives. You get twelve weeks, peak volume near 60 miles, and goal-pace work that holds specific from week 1 to week 11. If you have the base for it, you have the time to take 5 to 10 minutes off.
The structural answer to sub-1:45 on a 6-day schedule is the Sunday medium-long sitting on the back of Saturday's long. That stack teaches your legs to find half-marathon goal pace on tired tissue, which is what mile 9 of the race demands. You'll feel it for the first time in week 6, when the long run reaches 13 miles and the medium-long climbs over 9. By peak week, you'll know the 16-into-11.2 stack as familiar terrain rather than a question mark.
This isn't a starter plan, and it doesn't pretend to be. Pick it if you've trained six days before and the only question is structure rather than ceiling. If you're moving up from four or five days, the first two weeks are the real onboarding. The body that absorbs week 9 is built in week 1; week 12 only delivers what the early weeks set up.
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Structure
Does the plan build you up smartly?
Every phase boundary lines up with a real change in what the legs are asked to do. Two weeks of base settle the six-day rhythm, seven weeks of sharpening climb the goal-pace and tempo work in 3:1 patterns, and the peak (a 16-mile long run inside a 59-mile week) lands in week 9 with three weeks left to taper. Two genuine cutback weeks, at week 4 and week 8, cut both volume and hard sessions instead of just trimming miles. The build reads clearly from the calendar alone.
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Prevention
Does the plan protect you from injury?
Mostly, with one stretch that asks for honesty about how you feel. Hard days never touch (Tuesday intervals and Thursday tempo always sit an easy Wednesday apart), easy effort holds the large majority of the week, and the deloads at week 4 and week 8 are real. The one caution: after the first cutback, weeks 5 through 7 push the week-over-week load up to roughly a third above the recent average and hold it there, which is the steepest the plan runs. That climb is the back-to-back long-run stack doing its work, so the easy days through those weeks are the place to read fatigue early.
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Flexibility
What happens when you miss a day?
Lose an easy day and the week barely shifts; lose the Saturday long run or a goal-pace session and you are giving up the part that moves you toward sub-1:45. Every workout carries a priority, so when a week shrinks the supporting easy and medium-long runs are the ones to trim first. Pacing is set by effort and goal-pace targets rather than rigid splits, which leaves room to pull back when the legs are running ahead of the schedule. What the plan does not spell out is how to make up a missed long run. That call is yours.
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Readiness
Will the plan deliver race-day fitness?
Race-day fitness is the whole design here, built from the inside out. Goal-pace work grows from 4 by half a mile in week 1 to 8 by 1 mile in week 9, a full 8 miles at 8-minute pace in one session, and the peak long run reaches 16 miles with a 3-mile goal-pace block buried in its middle. The tempo ladder climbs to 4.2 miles, pulling your sustainable ceiling above race pace. By the taper the legs have rehearsed the exact rhythm Sunday will ask for, so the final weeks only have to keep it sharp.
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Variety
Are the workouts varied enough?
No two weeks ask the same thing twice. Four session shapes carry the load (goal-pace intervals that stretch from half-mile to mile reps, tempo runs that grow from 2.8 to 4.2 miles, aerobic long runs from 8 to 16 miles, and the back-to-back medium-long the morning after), each one tied to where you are in the build. Strides arrive in race week to keep the legs quick, and a strength session sits on the calendar through every build week. The interval and tempo distances are specified down to the tenth of a mile.
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.
You are in week one of twelve, and the first job is the boring one: meet the structure as it is rather than as you wish it were. You already know what this kind of work feels like, which is its own small problem, because the impulse to push from day one is exactly the impulse that costs you in week eight. Let the early easy days feel a little under-cooked. The training will get plenty hard on its own timeline, and you will be glad later for the discipline you spend right now.
M 5mi Easy Run
5 miles at conversational pace. The opening Monday of the plan. Run this easy enough that you finish wondering if it was enough. That ceiling is what protects Tuesday's intervals and lets the volume of the next twelve weeks build instead of break. Take the pace that feels almost too settled.
Tu Intervals: 4x0.5mi @ ½ Marathon
2 mile warmup, then 4 by half a mile at half-marathon goal pace with 0.25 mile recovery jog, then 2 mile cooldown. First harder session of the plan. The reps are at goal pace. Do not press faster. Meeting 8-minute pace is the whole point. The first one will feel almost easy. The fourth will tell you what you set in the first three. Each rep is a controlled visit to a pace the body is learning to call normal.
W 5mi Easy Run
5 miles at easy aerobic effort. The run serves as active recovery from yesterday's intervals while preserving the aerobic volume the week needs. Run by feel rather than pace. The watch is along for the ride, not the other way around.
Th 4.8mi Tempo Run with 2.8mi @ Tempo
1 mile warmup, then 2.8 miles at threshold pace, then 1 mile cooldown. First tempo of the plan. Threshold is the comfortably hard pace where you could speak in 4-word phrases but not full sentences. Find that ceiling and stay just under it. The work today is check as much as fitness. Sustained efforts like this raise the pace you can hold before breathing becomes the limiter. The session landed if the final stretch held pace without the form unraveling.
F Strength Training
Sa 8mi Long Run
8.0 miles at easy aerobic effort. The first long run of the plan. The variable today is distance, with pace held conversational. Settle into a rhythm in the first mile and let the legs find a sustainable cadence. This is the starting point the long runs grow from. The long run starts here and climbs from 8 to 16 miles by week 9. Today sets the rhythm that climb is built on.
Su 5.5mi Medium-Long Run
5.5 miles at easy aerobic effort. The first Sunday of the plan. The legs are tired from Saturday's 8-miler. That is the point of running today. The medium-long is where you learn what easy pace feels like when you are not fresh.
The aerobic side of the system is the part that is actually adapting in this stretch, and most of that work is happening on the days that feel like nothing. Capillary density, mitochondrial volume, the slow remodeling of the cardiovascular machinery: none of it announces itself in a single session, and you would not feel it if you tried. The easy runs are doing the heavy lifting underneath. Keep them genuinely easy. The harder days will keep their own appointments.
M 5.5mi Easy Run
5.5 miles at conversational pace. Second Monday of the plan. The legs may carry the residue of Sunday's medium-long. That fatigue is normal at this stage. Settle into the run before judging the pace.
Tu Intervals: 5x0.5mi @ ½ Marathon
2 mile warmup, then 5 by half a mile at half-marathon goal pace with 0.25 mile recovery jog, then 2 mile cooldown. The reps add a fifth without changing the shape. The pace is the same as last week. The test is holding it for one more rep. Run the recovery slowly enough that each rep starts clean. The rest between reps is what lets the work stay sharp from first to last. Run the first rep like you plan to enjoy the last one.
W 5.5mi Easy Run
5.5 miles at easy aerobic effort. Recovery-paced mileage after a hard session lets the body clear metabolic byproducts while still accumulating aerobic time. Keep the pace where full sentences flow without breath catching.
Th 5mi Tempo Run with 3mi @ Tempo
1 mile warmup, then 3 miles at threshold pace, then 1 mile cooldown. Tempo extends by 0.2 miles. The pace is the same. The test is holding it for one more half mile. The middle mile is where the discipline shows. This session teaches the body to clear effort while still working, which is what race pace leans on. Comfortably hard means a few words at a time, never full sentences. If you finished able to imagine one more mile, the effort was judged right.
F Strength Training
Sa 9mi Long Run
9.0 miles at easy aerobic effort. The long run climbs by a mile. Pace stays conversational. The goal is making the volume feel ordinary rather than special. The long run stretches endurance by keeping you out there longer, not by going faster.
Su 6.5mi Medium-Long Run
6.5 miles at easy aerobic effort. Second Sunday in a row of running on Saturday's residue. The run should feel slightly heavier than Saturday's. That is the cumulative load. Pace stays conversational rather than measured.
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All 12 weeks in the app
Daily coaching notes, nutrition guidance, reschedule logic, and strength placement.
Plan Strengths
- Goal pace shows up in week 1, with 4 by half a mile on Tuesday. By week 6 the pace is a familiar rhythm rather than something you'd be figuring out in week 11.
- Two real deload weeks. Weeks 4 and 8 pull both harder sessions off the calendar instead of just trimming a few miles, which is what makes the build that follows them productive.
- Friday strength isn't a tacked-on session. The placement 24 hours before the long run is deliberate. You arrive Saturday under residual load, which is closer to race-day reality than fresh legs would be.
- By peak week you'll have run a 16-mile long and an 11.2-mile medium-long back to back. The 13.1 of race day arrives as familiar terrain.
Weaknesses & Gaps
- Peak week stacks three goal-pace contacts inside a 59-mile week. Tuesday is a 6-mile race-pace block. Thursday is a 4.2-mile threshold tempo. Saturday is a 16-mile long with 3 miles at goal pace inside it. The week 8 deload is the runway, but expect week 9 to be the biggest week of the cycle by margin.
- The plan doesn't tell you what to do if you fall behind on the long-run build. Miss a long run and you're left guessing whether to repeat the week or jump ahead.
- Weeks 5 through 7 hold elevated load with no real recovery between them. If you arrive at week 5 already tired, that stretch can compound rather than build.
What's missing
Week 9 is the spike to plan around. Three goal-pace contacts inside a 59-mile week is the biggest stress in the cycle, and the week 8 cutback is what makes it survivable. If week 8 doesn't feel like a genuine pullback for you, take an extra easy day inside it rather than rolling into week 9 already tired. The middle block carries its own load too: weeks 5, 6, and 7 sit at elevated stress with no full recovery between them, so guard your easy days there and don't let a hard Tuesday bleed into Wednesday. The plan also doesn't tell you what to do if you fall behind on the long-run build. If you miss a long, repeat the prior week rather than try to make it back in one jump, and treat the long run as the session you protect when life forces a cut.
What the science supports
Periodization beats constant-load training
Five phases guide twelve weeks. Base establishes the six-day rhythm, Sharpen progressively adds goal-pace work, Peak consolidates fitness, Taper sheds fatigue, and Race Week arrives fresh. Each phase shifts emphasis at the right time. This phased arc produces better race-day results than running the same workout mix all twelve weeks.
Bradbury et al. 2020; Tønnessen et al. 2014; Casado et al. 2022
Easy aerobic volume is the foundation
Roughly eighty percent of your weekly running sits at conversational pace. The long Saturday run is slow. The medium-long Sunday run, even after Saturday's work, stays easy. Monday and Wednesday easy runs round out the aerobic base. That easy-dominant foundation is what lets you handle goal-pace intervals Tuesday and threshold tempo Thursday without crashing by week six.
Haugen et al. 2022; Casado et al. 2022; Tønnessen et al. 2014
Keep easy days easy, hard days hard
Monday, Wednesday, and the weekend are purely easy effort. Tuesday is intervals at goal pace. Thursday is threshold tempo. Friday is strength. Sunday's medium-long sits on Saturday's fatigue, but it's still conversational pace. The clean separation between easy and hard is what lets you do two hard sessions a week without burning out by month two.
Stöggl & Sperlich 2014; Casado et al. 2022; Kenneally et al. 2017
Tapering improves race performance by 2-6%
The final two weeks trim volume by roughly forty percent. Tuesday still gets goal-pace intervals; Thursday holds a short tempo. But the long run drops from sixteen miles to thirteen, and the medium-long shrinks to nine. That cutback is a taper. It lets your legs recover while the speed you've built stays in place. Most of the speed you'll run on race day is already banked.
Strength training improves running economy
Friday reserves a slot for strength training, though the specific lifts are yours to bring. Why it matters: strength work (particularly heavy lower-body moves) improves running economy, which means you run faster at the same effort. Studies consistently show two sessions a week produces meaningful gains. If that slot stays empty, the plan loses one of its better design choices.
Blagrove et al. 2018; Balsalobre-Fernández et al. 2016; Šuc et al. 2022
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