Running Plan Review Pete Pfitzinger Advanced Marathoning 18 Week, Over 85 mi/wk

Does it build you up smartly?

Pfitzinger's ordering is the spine of this plan. He ranks endurance first for the marathon, so the miles and the long runs come first. Threshold work grows out of that base, and the faster running waits until the miles are in place. Training that shifts its emphasis in stages like this tends to beat holding one kind of training steady for months, and the calendar names each block, so you always know what the current weeks are for.

The plan changes character after week 9. Up to then, three Sundays carry long stretches at marathon pace, 8, then 10, then 12 miles, and the midweek hard work is threshold. From week 10, repeats at 5K effort and tune-up races join in, and marathon pace doesn't come back until a short run in race week. The final weeks lean on speed more than on rehearsing the race.

Nothing on the calendar is vague. Each day names the kind of run and a distance range, and the hard days give the minutes or repeats at effort and the jog between them.

Does it protect you from injury?

Mostly, yes, but three gaps need watching.

The miles themselves aren't the main danger. Higher weekly mileage, built up gradually, tends to go with fewer injuries, not more, though that evidence comes from watching runners rather than from trials. What tends to hurt runners is a sudden jump in load, and the plan avoids most of them. No two hard sessions land on consecutive days, and every threshold run, set of repeats and marathon-pace run has its warm-up written in. From week 9 on, a big week and a lighter one alternate, close to 100 miles and then about 80, until the taper, so through its hardest stretch the load gets regular relief.

The first gap is week 7. Week 6 eases back to about 75 miles, the only dip in the first 9 weeks. Week 7 climbs back to about 98, nearly a third more, and it's the first week with two runs on four days, in the same week the threshold block begins. Measured against the month before, that climb stays moderate, but it's the largest single rise in the plan, so this is the week to watch. That month-long yardstick is the one that mattered when sports medicine doctor Brett Toresdahl tracked runners training for a marathon: "The only factor associated with injury in our analysis was this method of comparing participants' mileage over the course of a week to a month-long period." By that measure week 7 holds up, which makes it a week to watch rather than one to fear.

Strength is the second gap. The book lays out a full program, yet the calendar has no slot for it, on a schedule that already puts two runs on 52 of its days. Strength training lowers sport-injury risk substantially, more than stretching does, so this is a gap worth closing yourself, even if it means trimming a recovery run to make room. When Outside looked at Eliud Kipchoge's training in 2021, he and his training partners made that room twice a week with a strength and mobility session. "The exercises are not something where you suffer," said Marc Roig, the physiotherapist who oversaw it, and the aim was to avoid "any negative interference" with the running. That's the bar on a week of 10 or 11 runs: strength work that supports the miles without wearing you down.

The third gap is rest. There isn't a day without running anywhere in the 18 weeks. The book treats recovery runs as their own category, with a purpose and a heart-rate ceiling, and that's useful guidance. But all the recovery here depends on you running those runs slowly enough, day after day, with nothing on the calendar to check you. Brad Hudson, a 2:13 marathoner, ran 110 to 125 miles a week as a pro and was hurt again and again. Looking back, he named his mistake: "I made my easy days a little too moderate and my hard days not hard enough; 85 percent of running is just being healthy." On weeks near 100 miles, those slow runs are what keep you healthy enough to run the hard days hard. The book also covers the signs of overtraining and illness, but has no return plan for a specific injury, so catching trouble early is up to you. Early evidence, so far from footballers rather than runners, suggests a lingering low-grade ache may raise the risk of an injury that interrupts training, and on a schedule this full, it's a sensible cue to back off.

What happens when you miss a day?

Sooner or later, a cold or a trip costs you days of training. A plan earns its keep by telling you what to do about it, and this one does it well.

Its best tool is a simple rule for time off. If you miss fewer than 10 days, you pick the schedule back up where you are. For longer breaks, a table weighs how many days you missed against how many weeks are left, and tells you when to keep your goal and when to change it. It's the kind of decision runners agonize over, settled in a few lines. The authors give an example: "Missing 2.5 weeks of preparation when you have 16 weeks to go is no big deal, but missing that amount of time during the last 2 months of preparation will likely require you to modify your goal." So 2 weeks lost to a cold in week 3 barely register here, while the same break in week 14 is when you'll want that table open.

The rest of the guidance is about effort. Every day's distance comes as a range, so a crowded week can run at the low end without breaking anything. Threshold runs are set in minutes rather than miles, so a slower and a faster runner get the same dose. Every kind of run except the fastest has a heart-rate band. You can swap a recovery run for cross-training, and masters runners can stretch the training week to 8 to 10 days.

But when a week gets short, you're left to triage on your own. The book ranks the kinds of training in order, endurance first, then threshold, then repeats at 5K effort, then speed, so the long runs come first. It never turns that order into a list of which runs to drop first in a squeezed week. And with a run on every day, moving one workout always means displacing another.

Will it get you ready for race day?

In part. The taper is sound, but the weekly running goes far past what the race calls for, and the longest run comes early.

The long runs are the plan's backbone. Six Sundays reach about 20 miles or more, the longest is 22 to 24 miles in week 11, and that peak lands 7 weeks before race week, earlier than the 2 or 3 weeks out that most marathon plans aim for. A midweek long run comes most weeks on top. Coaches treat long runs as the core of marathon training, and this plan builds them with care. Early evidence links longer long runs to faster marathon finishes, though no study has tested whether shorter, faster sessions could do the same job. The 3-week taper cuts race week to about a third of the peak, and a taper like this improves race performance compared with training straight through. Runners often fear that cut. "Getting a 100 mile per week runner to go down to half of that mentally freaks them out," Thom Hunt, a former American 10K record holder who coaches at Cuyamaca College in San Diego, told Outside. Expect that feeling when your weeks here drop from about 100 miles to 76, then 62. That drop is what the taper is for.

So what do the extra weekly miles buy, over the 85 that caps the tier below? For a runner who has already trained high for years, likely more durability rather than a bigger aerobic engine, though direct evidence in trained runners is thin. That could matter in the last 6 miles of a marathon, when legs have to hold their shape. But six weeks between 97 and 101 miles go well past what the race calls for, and the cost is time, two runs on up to four days a week, and very little slack for recovery. Emily Sisson, who wrote the foreword to the book's 4th edition, ran 110 to 115 miles a week before her 2:18:29 marathon in Chicago. Even then, she didn't see more as the answer: "I could’ve done a bit more but maybe that’s not necessarily a good thing," she said. "More isn’t always better." Before you sign up for six weeks near 100 miles, ask whether your race needs them.

The plan is also lighter on hard running than its size suggests. About 9 miles in 10 are easy, and threshold running appears in seven sessions across the 18 weeks. For most recreational marathoners, marathon pace sits below threshold, so threshold runs and marathon-pace runs are different kinds of training, and either is a reasonable way to prepare. A plan this big could still give the effort you'll race at more room than it does.

Are the workouts varied enough?

Distance runners tend to do well on a lot of easy running with clearly hard sessions mixed in. Keeping easy days easy and hard days hard is the pattern top runners use, and it may beat a steady diet of moderate running. It's how this plan is built.

The hard days come in several kinds, and each asks something different. Threshold runs teach you to hold a hard effort for 20 to 45 minutes without tipping over. Marathon-pace long runs teach race-day rhythm on legs that are already tiring. Repeats at 5K effort, from 600 meters up to 1,200, work the top end. And three tune-up races, from 8K to the half marathon, test all of it with a bib on. Around them sit long runs, midweek long runs, steady aerobic runs and recovery runs, each with its own purpose.

Strides show up in 15 of the 17 weeks before race week, and 10 to 12 second hill sprints in five of them. They cost almost nothing in fatigue. Strides themselves haven't been tested, but short, explosive work can make runners more economical. The schedule itself is easy to follow: one column per week, a range in miles and kilometers in every cell, and the name of the run in each.