Running Plan Review Runner's World 16-Week 3-Day Marathon Training Plan

Does it build you up smartly?

The plan has a clear direction, but its hard sessions rarely say what they're for.

A marathon build should change as it goes, so each kind of work gets you ready for the next, and training that shifts its focus from block to block tends to produce slightly better race results than a steady, unchanging load. This one does shift. The first 6 weeks send you over hilly routes, which the plan says prepares your legs for faster running. Hill repeats follow, then the track. Friday's goal-pace miles and Sunday's long run grow alongside, and the final three weeks taper. The PDF never names these stages, but the order makes sense. Hills before speed is the order New Zealand coach Arthur Lydiard made famous. His training moved from endurance to "blending in hills and cross country, and finishing off with the speed and sharpening work," as running writer Jim Ferstle described it. This plan follows that order, with the long run carrying your endurance from week 1 and the track saved for last.

Each hard session is laid out step by step, with its warm-up, its repeats and its cool-down written in. The workout page explains each kind of run in general, but connecting that to week 11's 800s or week 9's long run is left to you.

Does it protect you from injury?

Partly. The plan keeps its hard days apart, but it leaves you on your own for the rest of your protection.

Your aerobic fitness tends to come up faster than your body's frame can follow. Tendons usually take weeks to a few months to adapt to more running, and bone takes longer still, which is why careful plans add mileage gradually rather than in big steps.

Week 9 is the big step in this plan, and almost everything grows at once. You run nearly 10 miles more than the week before, your first track session arrives, Friday's goal-pace stretch more than triples, and the 18-miler can finish at goal pace. Each change makes sense on its own. But they all land in the same seven days, and many running injuries seem to start suddenly, often right after a run that goes well past your recent longest.

The plan believes in lighter weeks too. In week 4 it tells you a cutback every few weeks will keep you fresh and help you stay injury-free. But it mostly shortens the long run and leaves the rest of the week alone. In week 12 the long run drops to 15 miles, yet the easy runs grow and the week ends up bigger than the one before. A runner on a fixed plan needs relief from load that keeps building, and a scheduled lighter week is the simplest way to build it in. U.S. Olympic marathoner Ryan Hall used to train straight through a marathon build, with no day off and no real drop in mileage. Later he switched to a down week every seventh week, saying he believed they "will get me to the shape I hope to be in." This plan builds more like Hall's old way. From week 9 until the taper, your running only grows, so you carry five straight weeks of building into the biggest runs of the plan.

Strength training is left to you as well. It comes up twice, both times in week 7, as a tip on an easy day and another on a rest day, in the same week the hill repeats arrive. Neither makes it onto the schedule. A runner who chose three days because time is short is also short on time to recover, and three big sessions with nothing scheduled around them put a lot on fewer, larger days. Strength training lowers the risk of getting hurt in sport substantially, more than stretching does, and this plan never makes room for it. Strength exercises "might be effective," says Hunter Bennett, a researcher at Adelaide University, but "only if you actually stick to them." With no session on the calendar, sticking to them is up to you, so give them a spot on one of your four open days.

The plan doesn't tell you what to watch for, or when to skip a session. In a week built on three big runs, each one can feel too important to miss, so an ache that hangs around from Wednesday to Friday tends to get run through. Early evidence, mostly from other sports, suggests a lingering ache like that may raise the odds of an injury that stops you running. With only three key runs, stopping early feels expensive, and nothing in the plan tells you it's fine.

What the plan does well: hard runs never fall on back-to-back days, every hard session opens and closes with a mile or two of easy running, and in its biggest weeks it tells you to rest on your off days rather than add more.

What happens when you miss a day?

Two of the plan's key runs hang on your goal marathon time. Friday's miles are run at it, and the 800-meter repeats are timed from it. The mile repeats go by your 10K race pace, and the easy runs by your 5K. The plan does bring up the goal itself in week 13, when it suggests setting three of them: one you're sure of, one you'll probably reach, and a stretch. By then most of the goal-pace work is behind you.

But none of these paces ever update. There's no effort scale to fall back on, and nothing to do if the race times behind them go stale over 16 weeks. If your goal was too ambitious, Friday tells you so week after week, and the plan offers no way to adjust.

Missed runs get one rule: move workouts where you need them, but never put two hard days back to back. Nothing covers a missed week, an illness, or coming back after time off. FIRST co-founder Bill Pierce, whose program also runs on three key days a week, kept the rule simple. "You can't make up what you missed," he said, "and you certainly shouldn't double up on your workouts to catch up with your program." That fits this plan's own rule about hard days, so after a missed week, pick up the schedule where it stands.

What the plan does give you is room. It says that getting through the three key runs in most weeks is enough, and everything else is extra credit. With four days open, a key run can usually move rather than disappear. But when a week truly breaks, the plan doesn't say which of the three to keep and which to let go. It does tell you clearly who it's for, so you know before you start whether your running is ready for it.

Will it get you ready for race day?

Yes, because it prepares you for both things a marathon asks: to keep going for hours, and to hold your goal pace once you're tired.

The first is the long run. Marathoners who train with longer long runs tend to finish faster, though no one has tested whether shorter, faster sessions could stand in for them. This plan takes the long run to 20 miles in weeks 10 and 11 and to 22 in week 13, three weeks before the race. Before the first 20, it reminds you that you've been building toward it for 10 weeks and that it's only 2 miles longer than your last long run.

The second gets practice every Friday. Your stretch at goal pace starts at 2 miles and reaches 8, so by race day the pace is a familiar feeling rather than a guess. Week 6 adds a 5K race if you can find one, and the plan uses it to rehearse a race plan: hold your marathon pace for the whole 5K, or run each mile a little faster than the last, without getting swept up at the start. That kind of rehearsal may help your pacing on race day, though it rests on coaching practice more than tested science.

Then the plan backs off, and its advice for the final weeks is "rest, don't rust." The long runs shrink to 15 and then 12 miles, Wednesday's session shortens and then becomes an easy run, and race week is three short easy runs. In week 15 it asks you to resist the temptation to do more. That's the right call, because a 1 to 3 week taper improves race performance compared with holding your training steady. Two scientists at University College Dublin looked at the training logs of more than 158,000 marathoners and found strict three-week tapers were linked to faster finishes. Many recreational runners, they wrote, could improve "by simply switching to this more disciplined taper format." This plan gives you that kind of three-week taper, so let the shorter runs do their work.

Are the workouts varied enough?

Trained distance runners may improve more when easy days and hard days are kept clearly apart. About 81 percent of this plan's running is easy, and that easy running is the base that carries the harder work and helps your body adapt to it. Two-time Olympic marathon champion Eliud Kipchoge split his week in a similar way. "I try not to run 100 percent," he said in 2021. "I perform 80 percent on Tuesday, Thursday, and Saturday and then at 50 percent Monday, Wednesday, Friday, and Sunday." This plan's week has the same kind of split, with easy running or rest on the days between its key runs, so keep those days easy. The three key runs each do a different job.

Wednesday is where the variety lives, and it changes as you get fitter. You start on hilly routes, try hill repeats with a few sprints in weeks 7 and 8, then go to the track for mile repeats near your 10K race pace and 800-meter repeats timed from your marathon goal. Over the 16 weeks, Wednesday takes four different forms, each asking your legs and lungs for something new.

Friday has another job: steady running at goal pace, so you get to know the speed you want on race day. Sunday's long run builds the endurance underneath both, and it changes too, from easy miles to a 5K race in week 6 and a long run that can finish at goal pace in week 9.