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This marathon plan from Bill Pierce and Scott Murr is the 16-week marathon schedule from Run Less, Run Faster, now in its third edition. Pierce and Murr taught health sciences at Furman University and started FIRST there in 2003. The idea grew out of their own triathlon training. They cut runs to make room for the bike and the pool, and their run times held. Murr has finished 12 Ironmans, and Pierce has run Boston in five decades. FIRST and its program were featured in Runner's World in 2005. Runners come to this plan for one promise: a marathon on three runs a week.
"Run less" doesn't mean train less. Two days of cross-training take over the job easy runs usually do, and the three runs are built with care. Two are hard sessions, a track workout and a tempo run. The third is a long run with a pace target the whole way. The long runs reach 20 miles five times, and two full days off each week give your legs real rest.
But the plan leaves out some of what protects a runner across 16 weeks. It doesn't name the warning signs to watch for, it doesn't schedule the strength work the book recommends, and it has no easier option for a day when the paces are too much. It suits a runner with a solid base who likes training by the numbers. It's a harder fit for anyone coming back from an injury, or anyone who'd rather run by feel.
Decent
| Structure | 3 | |
| Prevention | 4 | |
| Flexibility | 3 | |
| Readiness | 5 | |
| Variety | 4 |
Every week has the same shape. Tuesday is a track session: repeats at about the pace you'd race a 5K. Thursday is a tempo run, a few miles of hard, steady running with an easy mile or two at each end. Saturday is the long run, at a set pace a little slower than marathon pace. Monday and Wednesday are cross-training on a bike, an elliptical, a rowing machine or in the pool. Friday and Sunday are days off.
The long run climbs fast, from 13 miles in week 1 to 20 by week 4. Thursday's tempo runs change in length and effort, and a few of them hold 5 miles at marathon pace. From week 10, three Thursdays stretch to 10 miles at marathon pace. You look up every pace in the book's tables, using a current 5K time.
The plan asks for about 25 miles a week for three months before you start, and a 15-mile long run already behind you.
A week with FIRST
Here is week 9, from the middle of the plan.
MONDAY is cross-training. You choose a bike, an elliptical, a rowing machine or the pool, and hold a moderately hard effort, about what a tempo run feels like.
TUESDAY is the track session. After a 15-minute warm-up jog, you run 2 sets of 6 × 400 meters at the pace you'd race a 5K, with 90 seconds of recovery after each one and a slightly longer break between sets. A 10-minute cool-down finishes it.
WEDNESDAY is cross-training again, this time as intervals: harder efforts with easy spells between them.
THURSDAY is the tempo run. You run 1 easy mile, then 4 miles at about the pace you'd race a 10K, then 1 more easy mile.
FRIDAY is a day off.
SATURDAY is the long run, 20 miles at a set pace a little slower than marathon pace.
SUNDAY is a day off.
That's 2 hard runs, a long run with a pace target, 2 cross-training sessions and 2 days off. No 2 hard runs ever land back to back. But the cross-training days aren't easy either, so in most weeks you're working on 5 days out of 7. There are no junk miles here, and no gentle ones.
Saturday is the run you'll remember. Twenty miles at a pace target is a different thing from 20 miles at whatever pace your legs offer that morning. The early miles feel almost too slow. Past halfway, holding the number takes real attention, and the last few miles feel a lot like racing.
The week turns on Friday. It's the only day between Thursday's tempo and Saturday's 20 miles, so treat it as part of the training: rest, sleep, keep your legs up. If your legs still feel heavy from Thursday when Friday ends, Saturday's target will be hard to hold. The plan has no easier version of that run, so the call to slow down is yours. Making it on the right day costs you very little. Forcing the number every week is how the tiredness piles up.
Does it build you up smartly?
A marathon build should change its job as race day nears, and each session in it should say what it asks of you and why. This plan gets the shape right but leaves gaps on the page.
The schedule never says why a session is there. The book explains each one, but on the calendar a Tuesday of 400s and a Tuesday of mile repeats look like the same job. And the plan's two stretches of training aren't labelled, so nothing on the page tells you that from week 10, three of the Thursdays become 10-mile runs at marathon pace.
But the sessions themselves are precise. Each one names its warm-up, how many reps and how long, the rest after each, and the cool-down. The move from track work and tempo runs toward 10-mile runs at marathon pace comes in a sensible order, and shifting the emphasis from block to block tends to beat holding one load all the way, though the edge is small. If you want to know exactly what Tuesday asks of you, this schedule tells you.
Does it protect you from injury?
Mostly, yes. The load builds without sudden spikes, but strength work and knowing when to stop are left to you.
Sudden jumps in running tend to raise injury risk, a single run well past your recent longest most of all, and many of those injuries start suddenly. This plan steers clear of those jumps. No week spikes far above the few weeks before it, a new kind of session never arrives in an already big week, and no two hard runs fall on back-to-back days. Friday and Sunday are always off. And because cross-training stands in for easy runs, your legs skip two days of impact every week.
Lighter weeks come in weeks 7, 13 and 15. Without a coach to adjust things, planned breaks like these are how a fixed plan keeps training load from piling up unrelieved, and that kind of buildup tends to raise the risk of injury and illness.
The mileage looks modest, but it carries more than it shows. Almost every mile has a pace target, and mileage alone misses the stress that pace and effort add. A 20-miler at a set pace in week 4, two days after a tempo run, is a lot to ask of legs that are a month into the plan.
Strength is the first gap. The book gives you a full strength program, but the plan never puts a session on the calendar, so finding room for it around Tuesday's track work and Saturday's long run is your job. Strength training substantially lowers injury risk, more than stretching does, so leaving it off the schedule is a real gap.
The second gap is warning signs. The plan doesn't tell you what to watch for, and while the evidence is early and comes from footballers, a lingering ache between runs may raise the risk of an injury that stops you running. With a number on every run, it's tempting to hit the target through a sore calf or a tender shin. On those days, treat the pace as a ceiling. Easing off for one Tuesday costs far less than missing three weeks.
What happens when you miss a day?
Partly. The book has good rules for missed days, but none of them are on the schedule, and there's no effort-based fallback when a pace is out of reach.
Every run in this plan is set by pace. There's no effort to aim for instead, so the plan can't help on the Saturday when Thursday's tempo is still in your legs, or on the Tuesday after a 20-miler when the reps won't come. When the target feels out of reach, it doesn't say whether to slow down, cut the session short, or push through.
The paces come from a current 5K time, from a race or a test of 3 × 1600 meters, read through the book's tables. They move up after a faster race, or once all three weekly runs feel easy. But there's no rule for moving them down.
The book's rules for missed days are sensible. You can move days around as long as the three runs don't land back to back, add one or two extra easy runs, and drop a missed workout or even a whole week rather than squeeze it in. The three runs are clearly the heart of the week, with cross-training in support, so you can work out what to keep when a week gets crowded. But the schedule spells none of this out. You'll find it in the book, if you go looking.
The book also teaches well. It explains what each session does for your marathon and how the paces relate to each other, so you understand the plan instead of just following it. And if you aren't ready for this plan yet, it gives you a novice marathon plan to start with.
Will it get you ready for race day?
A marathon is decided late, in miles your legs have to be ready for. That's why most coaches build the long run high, and early evidence links longer long runs with faster marathon finishes, though no one has tested whether shorter, faster sessions could do the same job.
This plan's long runs are its strongest suit. They reach 20 miles five times, the last one 2 weeks before race week, and each has a pace target that edges closer to marathon pace as the race nears. By the start line, 20 miles at a steady pace is something you've done, more than once.
The Thursday work backs them up every week. For most recreational runners, threshold running (roughly the effort you could hold in an hour-long race) and marathon pace are different kinds of training, and neither has been shown to beat the other. This plan gives you both. The tempo runs give you threshold practice from the first week to the last. The 10-mile runs at marathon pace in the second half let you feel race pace on its own, in one long block.
The taper is where the plan makes a trade. Week 14 is the biggest of the plan, with a 20-miler and 10 miles at marathon pace. Week 15 trims the mileage by about a third, but keeps 8 × 800 meters at 5K pace, a 5-mile tempo and 13 miles at marathon pace. Race week still opens with 5 × 1000 meters at 5K pace on Tuesday, and has a tempo run on Thursday, two days before the race. A taper that cuts volume while keeping some intensity improves race performance compared with training straight through, and this one keeps nearly all of the intensity. The cost is that the hard running stays in until the last few days, so you may start the race with some of it still in your legs. The book does let you skip cross-training in race week, which helps.
Are the workouts varied enough?
Yes, in the hard running. Less so in everything around it.
Mostly easy running mixed with clearly hard sessions tends to build endurance a little better than long stretches at one steady, medium effort. This plan's hard days rarely sit still. Tuesday's reps change length almost every week, from 400s up to mile repeats, with a ladder and a mixed set along the way. Thursday moves between shorter and longer tempo runs, and between 5 and 10 miles at marathon pace.
The easy side is thinner, because the plan moves most of it off your feet. About two thirds of the running counts as easy, counting the long run, warm-ups and cool-downs, and there isn't a single easy run on the calendar. Easy running is the base that carries the harder training. Research backs short, hard sessions for runners pressed for time, but as an addition to easy running, not a substitute for it. The book's case is that two days on the bike or in the pool do the job those easy miles would. That's the trade you accept with this plan.
Strides are missing from the calendar too. The book asks for them, along with drills, before Tuesday's session, but they never show up on the schedule. They're a handful of short, relaxed pickups, and explosive work of this kind can help the same pace cost you less, though strides haven't been tested on their own. Strength training improves running economy more dependably.
The good & bad of training from a book
Run Less, Run Faster covers far more than this schedule. It has plans from the 5K up, Boston-qualifying plans in chapter 17, and chapters on cross-training, strength and stretching.
Running this plan from it takes some work. The schedule uses abbreviations for each kind of tempo and pace, and you decode them with tables in chapter 6. You find your 5K time with chapter 5, choose your cross-training workouts from chapter 7, and turn to chapter 14 for strength and chapter 15 for stretching. Before a Thursday at marathon pace, you'll be checking a table to see what that means for you.
The page also stays fixed. If a 20-miler goes badly and you need an easier week, or you miss one of the 10-mile marathon-pace runs, the schedule doesn't shift to fit. Moving the weeks around is up to you.
Is it right for you?
Run it. That's the base this plan is written for, and its three runs put it to work.
Run it. The 2 cross-training days fit training you do anyway, the way the method began.
Run it. Every rep, tempo mile and long run has a pace from the book's tables.
Think it over. The book's own novice marathon plan is built as the step before this one.
Think it over. There are 2 hard runs and a paced long run every week, and no warning signs listed to stop for.
Look elsewhere. Every session is set by pace, and there's no effort-based version.
A good alternative with an app
If three runs a week suits your life, Buena Vida has a plan for its members that keeps that shape. Every run has a clear job, and no two runs fall on back-to-back days.
Closest matchWhy this plan scores higher
- One hard run a week instead of two, plus a longer easy run on Thursday and a long run that stays mostly easy
- A note on every hard session that says what it asks of you and why
- Strides every other Thursday, a few short, relaxed pickups
- A 3-week taper that trims the running and keeps a little speed, with a race week of just a short goal-pace run and a 1-mile shake-out
- Every target worked out for you in the app, with no tables to look up
- Strength sessions on your calendar every Monday and Wednesday until race week
What the app adds
- No complicated lookup tables. Each day's workout is clear and easy to follow
- Paces worked out from your own fitness, and adjusted automatically as you get stronger
- Miss a run, move a run, and the plan carries on
- Voice coaching through every workout, and runs recorded from your iPhone, Apple Watch, or Garmin
Get more out of your running with Buena Vida
Buena Vida was built by a runner to bring the whole job of training into one place: a plan that fits your schedule and your fitness, coaching on every run, and food targets that keep up with the work you do. Members get personal training & nutrition plans, plus full access to the catalog of pre-written plans for every running goal.
In research studies, runners on plans fit to them improved as much as or more than runners on fixed plans, and fewer of them stalled.
Try it FREE for 7 days. After that, it's $99.99 a year or $14.99 a month, and you can cancel anytime.
More plans like this
Each of these plans takes its own route to race day. Effort-based plans set your hard sessions by feel, so you learn what 10K effort and tempo feel like, and your training paces grow with you as you get stronger. Time-goal plans set every pace from the finish time you're aiming for. Others trade days, weeks, or mileage to fit your life.
Frequently asked questions
- Do I need the book to run the FIRST marathon plan?
- Yes. The schedule is written in abbreviations, and the paces for each run are in tables in Run Less, Run Faster, read off a current 5K time. The cross-training workouts and the strength program are in the book too.
- What does 3Plus2 mean?
- 3 runs a week plus 2 cross-training days. The runs are a track session, a tempo run and a long run. The cross-training days use a bike, an elliptical, a rowing machine or the pool, in place of easy runs.
- How are paces set in the FIRST marathon plan?
- From a current 5K time, either a recent race or a test of 3 × 1600 meters, through tables in the book. You can't set them from a goal time.
- Is the FIRST marathon plan good for a first marathon?
- The book offers a separate novice marathon plan as the step before this one, starting from an 8-mile long run. This plan expects about 25 miles a week for three months and a 15-mile long run before week 1.
- How many days a week does the FIRST marathon plan run?
- 3 days of running and 2 of cross-training, with 2 days off. Tuesday, Thursday and Saturday are runs, Monday and Wednesday are cross-training, and Friday and Sunday are off.
- Does the FIRST marathon plan include strength training?
- The book has a full strength program, but the plan never schedules it. Fitting it in around the hard days is up to you.
- Does the FIRST marathon plan have recovery weeks or a taper?
- There are lighter weeks in weeks 7, 13 and 15. The last 2 weeks are lighter than the peak, but both still include track repeats and a tempo run.
- What happens if I miss a workout in the FIRST plan?
- The book lets you drop a missed workout, or even a missed week, rather than cram it in. You can also move days around, as long as the three runs don't land back to back.
Research notes
- Shifting training emphasis beats unchanging training
- Sharp running-load jumps raise injury risk
- Many running injuries start suddenly
- Fixed plans need built-in lighter weeks
- Mileage alone doesn't measure your load
- Strength training lowers injury risk
- Niggles often warn of a bigger injury
- Longer long runs go with faster marathons
- Threshold or race pace: neither proven better
- A real taper sharpens you for race day
- Mix easy and hard instead of steady medium
- Easy miles do most of the work
- Short hard intervals work when time is tight
- Explosive work can make you more efficient
- Strength training makes running more efficient
