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This 5K plan from Matt Fitzgerald is the gentlest of three levels in 80/20 Running, a 9-week build toward a first structured 5K. Fitzgerald co-founded 80/20 Endurance, which credits him with turning research on how elite endurance athletes train into a rule any runner can use: keep about 80 percent of your training easy, and make the rest count. He also coached for Carmichael Training Systems. In the book, he argues that most recreational runners spend too much of their running at a moderate effort, and that slowing down on most days is how they get faster.
The idea behind this plan is sound, and the schedule follows it. Most of the running is easy, the hard days are clearly hard, and an easier day always sits between them. But the plan asks a lot of a newer runner's legs, and it asks early. In week 2, the amount of running more than doubles. There's no strength work, on the schedule or in the book, and no advice on what to do when something starts to hurt. For a runner who clears the plan's entry bar with room to spare, and who takes the cross-training swaps week 2 allows, it's still a workable first step into structured training.
Decent
| Structure | 3 | |
| Prevention | 3 | |
| Flexibility | 3 | |
| Readiness | 4 | |
| Variety | 5 |
The plan runs in 3 phases. The first 3 weeks build a base of easy running, with 1 or 2 harder sessions a week: short hard efforts mixed into an easy run, and a run that finishes at a moderate effort. The next 5 weeks add uphill sprints, then longer hard efforts, and the faster-finishing run moves to Sunday and grows. Race week eases off before a 5K on the final Sunday.
Monday is always a day off. Many of the easy days can be swapped for cycling, swimming or other cross-training. Every run is set by effort, which you can read by feel, by heart rate or by pace, using zones you work out before you start.
It's written for runners who can already run 20 minutes without stopping, are running at least 3 times a week, and do some kind of aerobic exercise 6 days a week.
A week at 80/20
Here is week 5, the middle of the plan.
MONDAY is a day off, as it is every week.
TUESDAY is the first hard day. After a 10-minute warm-up, you run 4 hard efforts of 2 minutes each, with 2 minutes of very easy running after each one, then cool down.
WEDNESDAY is 35 minutes of easy running, at an effort where you could talk in full sentences. You can swap it for 35 minutes of cross-training.
THURSDAY is the same easy 35 minutes, with the same swap allowed.
FRIDAY is the second hard day. After the warm-up, you run 8 uphill sprints of 30 seconds at close to your hardest effort, with 90 seconds of very easy running after each.
SATURDAY is 35 minutes of very easy running, gentler than Wednesday's, or cross-training instead.
SUNDAY is 35 minutes too, but the last 10 are at a moderate effort: harder than easy, well short of hard.
That's 6 days of training and 1 day off. Two days are hard, Sunday ends with some faster running, and the 3 easy days can be runs or cross-training, as you choose.
Wednesday decides the week. Tuesday's repeats are still in your legs, Thursday asks for the same easy run again, and both have to stay truly easy. That's harder than it sounds. Easy here is set by effort, and on a heart rate watch it often means a jog that feels embarrassingly slow, or a walk up the steeper hills. Fitzgerald's own argument is that most recreational runners do less than half their training at a truly easy effort, drifting into the middle without noticing. His method depends on not doing that, so Friday's sprints get your best effort instead of your leftovers.
Saturday is the other choice that matters. It sits between Friday's sprints and Sunday's faster finish. A ride or a swim gives your legs a break from the pounding while your heart and lungs still get their work. On a week when your shins or feet are grumbling, that's the run to swap.
Does it build you up smartly?
Training works best in stages. Easy running comes first and builds the base. Harder work arrives once your body can take it, and the running eases off before the race. Plans built in stages like this tend to beat plans that hold one load all the way through.
Fitzgerald's plan has that shape, and the phases are labelled right on the calendar: 3 weeks of base, 5 weeks of harder work, then race week. The hard sessions change as you go, from short efforts mixed into easy runs, to uphill sprints in the middle weeks, to longer 3-minute efforts near the end. Each phase gives your body something new to adapt to.
But the schedule itself says only what to run. Each entry lists the minutes to spend in each zone, with nothing on what the session is for. The reasons sit in a table in another chapter of the book, there for a runner who looks them up.
Does it protect you from injury?
Partly. It asks a lot of a newer runner's legs early, never schedules a lighter week before race week, and leaves strength and warning signs to you.
The plan gets some daily habits right. Every interval, speed and hill session starts with a 10-minute warm-up, no two hard days come in a row, and Monday is always off. After week 2, the running grows steadily.
But week 2 is a problem. Week 1 is 3 runs plus 3 cross-training sessions of 20 minutes. Week 2 is 6 runs. Your running goes from about 72 minutes to about 160, and a new kind of workout, the run that finishes at a moderate effort, arrives in the same week. A jump in weekly running this large is a warning sign for injury, especially for a newer runner.
The jump is easy to miss, because your total training time rises only about a fifth. Week 1's cycling or swimming already trained your aerobic engine, so week 2 won't feel like much more effort. Your legs feel it differently. Blood and muscle energy systems tend to adapt within the first few weeks, while tendons take weeks to months and bone takes longer still, and in week 2 your tendons and bones take twice the pounding. The fix sits in the plan itself. Three of week 2's easy runs can be cross-training instead, and taking that swap keeps the jump small.
The hard running starts early, too. Day 4 brings three 2-minute hard efforts, and week 2 adds one-minute efforts at the top of the effort scale, for a runner whose entry ticket is 20 minutes of continuous jogging. For a book that preaches patience, it reaches for intensity fast.
The build also never pauses. The closest it comes is week 6, which shaves about 5 minutes off most runs before week 7 climbs again. The first real lighter week is race week, and it follows directly on the plan's heaviest week. Load that piles up with no break tends to raise the risk of injury and illness, and on a fixed plan, a scheduled lighter week is the simplest way to get that relief. A 9-week plan has room for one, somewhere in the middle. This one doesn't take it.
The book covers a lot, but it leaves out strength entirely. None is on the schedule, and there's none in the book to add. That's a real gap, because strength training substantially lowers the risk of injury in sport, more than stretching or balance work alone.
It's also silent on warning signs. There's no list of aches to watch for and no rule for when to back off. Plenty of runners notice that a low-grade ache that lingers may turn into a full injury that interrupts training, though that has been measured in footballers rather than runners. A runner in the first months of the sport may not know to watch for one, and may run straight through it.
What happens when you miss a day?
Missed days come with every training block. What helps is a plan that tells you what to keep and what to let go.
This one is strong on effort. The book's five zones run from very easy to all out, and you can read them by feel, by heart rate or by pace, so you're never guessing how hard a run should be. Because they follow your effort, they keep up with you as you get fitter. Within about 8 weeks, the same easy pace starts to come at a lower heart rate, and a run held in the right zone simply carries you a little farther. The book also explains what each kind of run is for, so you understand the week you're running.
But when you miss a run, you're on your own. The book doesn't rank the week's sessions, and it has no rule for a missed hard day, a lost week, or a return after time off. The one built-in option is the swap: many easy runs can be cross-training instead. That helps when your legs need a break. It doesn't help when your week falls apart.
Will it get you ready for race day?
Mostly, yes. The plan practices the kind of effort a 5K asks for, and gives you enough of it.
A 5K is short, but it's run hard from start to finish. What carries you through it is the strongest effort you can sustain, and most coaches build that by practicing hard, sustained running. This plan does that every week. The faster-finishing runs end at a moderate effort, where talking shrinks to a few words at a time, and the efforts on Tuesdays and Fridays go harder still. By the last weeks of the build, the hard sessions are at their longest and the Sunday run has grown past 40 minutes.
Race week eases off, with about 40 percent less running than the week before. But it's a single step down from the plan's heaviest week. Your legs get a few days to freshen up, not a couple of weeks, and you may still feel week 8 on the start line.
Are the workouts varied enough?
Yes. The hard days change shape all the way through, and each version asks something a little different of you.
Most coaches hold that runners do better when easy days stay easy and hard days are clearly hard than when everything drifts toward the middle. This plan keeps the two clearly apart. About 88 percent of the running is easy. The rest comes in short bursts with a reset after each one: efforts of 1 or 2 minutes mixed into an easy run, 30-second sprints up a hill, 3-minute efforts near the end, and a run that finishes at a moderate effort.
The uphill sprints in weeks 4 to 6 are short enough to run with good form, and the hill keeps the pounding low. Coaches use short, fast efforts like these as stride practice, and they don't leave you wrecked for the next day.
For a first structured 5K, that's a generous range, and the book explains what each session is there to do.
The good & bad of training from a book
80/20 Running spends its first five chapters making Fitzgerald's case: that most recreational runners spend too long at a moderate effort, and that easing off on most days is how they get faster. He builds it on research into how elite endurance athletes split their training, and it's the part of the book worth reading before week 1.
But the plan is spread across the book. It lives in one chapter as a grid of workout names, each with a number. The minute-by-minute detail for each number sits in a table in another chapter. Your zones come from a third, after a test you do before you start, and cross-training choices from a fourth. The grid also never says why a session is there. The reasons are in the chapters, for runners who go looking. Expect a few bookmarks, and a few minutes with the book before each new kind of session.
And the schedule doesn't move. If you lose a few days, the book leaves the replanning to you.
Is it right for you?
Run it. That's the habit the book asks for at Level 1, and week 1 builds 3 cross-training sessions into the schedule.
Run it. Every run is set by effort zone, and the book shows you how to find yours.
Look elsewhere. Week 1 already has hard efforts, and week 2 has 6 runs. A plan that starts with walk breaks will serve you better.
Look elsewhere. Your running more than doubles in week 2, and nothing in the plan or the book helps you spot trouble early.
Think it over. Take the cross-training swaps in week 2 anyway. They keep the plan's biggest jump small.
Look elsewhere. This plan trains 6 days a week, with only Monday off.
A good alternative with an app
If the idea of keeping most of your running easy appeals to you, Buena Vida offers its members a plan built on the same principle, with a gentler start and more protection along the way. Its runs are almost all easy, with one hard hill session in week 6.
Closest matchWhy this plan scores higher
- Strength sessions on the schedule every week until race week, on a day with no run
- A lighter week in week 5, so the build pauses well before race week
- Running that grows a little at a time, with no week that doubles the one before
- Short, relaxed strides on an easy run most weeks from week 5, without adding a hard day
- Warning signs to watch for in your first months of running, and a way to adjust the plan when an ache starts
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.
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More plans like this
Each of these plans takes its own route to race day. Effort-based plans, like the Buena Vida plan above, 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 80/20 5K Level 1 plan?
- Yes. The schedule names each workout and gives it a number, and the details for each number, along with how to set your effort zones, are in other chapters of 80/20 Running.
- What do the zones in the 80/20 plan mean?
- The book uses 5 effort zones. Zones 1 and 2 are low intensity, from very easy to comfortable and conversational. Zone 3 is moderate. Zones 4 and 5 are high intensity, from hard to close to all out. The 80/20 split is about time: roughly 80 percent at low intensity, the rest at moderate or high. Each week states its own split, nearer 90/10 early in the plan.
- How do I find my zones for the 80/20 plan?
- The book has you find your threshold heart rate with a 30-minute time trial or a simpler talk test, then sets your 5 zones from it. You can match paces to those zones, or use Greg McMillan's calculator with a recent race result. Redo it after a new best time.
- Is the 80/20 5K Level 1 plan good for beginners?
- For some. It's written for runners who can already run 20 minutes without stopping, are running at least 3 times a week, and do some kind of aerobic exercise 6 days a week. If that isn't you yet, start with a plan that uses walk breaks.
- How many days a week does the 80/20 5K Level 1 plan train?
- 6, with Monday off. Week 1 has 3 runs and 3 cross-training sessions. From week 2, there's a run on all 6 days.
- Can I cross-train instead of running on the 80/20 plan?
- On many days, yes. From week 2, most of the easy runs can be swapped for cross-training of the same length, and Level 1 allows more swaps than the book's other two levels. Choosing the activity is left to you, with a chapter of the book to help.
- Does the 80/20 5K Level 1 plan include strength training?
- No. There's none on the schedule, and the book doesn't offer any to add. If you want it, you'll need to plan it yourself.
- What if I miss a run on the 80/20 plan?
- The book doesn't say. It doesn't rank the week's sessions or explain how to handle a missed hard day or a lost week. The one built-in option is swapping an easy run for cross-training.