Running Plan Review Greg McMillan Marathon: Intermediate-Advanced (Endurance Monster)

Does it build you up smartly?

The build has a clear shape, even though the schedule never names it. The first weeks lean on hills and steady running. Marathon goal pace is there from the first Sunday, at the end of the long run, then moves into the midweek runs, and by weeks 7 to 9 it has taken over the key days. That order heads straight for what the race will ask of you, and moving through phases like this tends to produce better racing than holding one load all the way to race day.

The lighter weeks are just as well placed. Weeks 4 and 8 ease off, then the running steps down through weeks 10 and 11 into the race. For a runner who would happily add miles every week, those breaks matter, because a lighter week is when recent training turns into fitness.

But the schedule keeps its reasoning to itself. The phases have no labels, and each session is printed as a bare instruction: run 70 to 90 minutes, make the last 15 to 25 fast. Why that run is there, and what it should feel like, is explained in another part of the book. If you want to understand the shape of your training as you go, you'll be putting it together yourself.

Does it protect you from injury?

Mostly. The plan handles the big things, but it has two gaps, and one thing to check before you start.

No two hard days ever touch, and the lighter weeks come every few weeks through the build. The book also teaches you to read the early warning signs and back off when they show up. That matters, because a nagging ache that won't clear between runs appears to raise the odds of an injury that stops you running.

But strength is missing from the calendar. The book offers a sample routine and a full program online, then leaves the scheduling to you. With five set runs and two optional days, there is room for it, but finding the slot each week is your job, and strength training substantially lowers the risk of sports injuries.

The other gap is two steep weeks. Week 5 bounces back from the lighter week with nearly half again as much running, and brings the first fast half-mile repeats with it. Week 7 is the real danger. It adds about a quarter more running than week 6, and it's the week a 22 to 26 mile long run meets 8 to 10 miles at goal pace on Thursday. Sharp jumps in weekly running raise injury risk. And miles at goal pace cost more than the mileage shows, so week 7 lands harder on your legs than its total suggests.

The thing to check is where the plan starts. It starts at cruising altitude: close to 50 miles in week 1, with a long run of 14 to 20 miles that finishes at goal pace. Week 1 should feel like a normal week, not a reach. If it isn't one for you, build up first.

What happens when you miss a day?

A plan shows what it's made of in the weeks that don't go to plan. Here, the book never says which runs to drop in a short week, or what to do with a week you missed: whether to run it late, drop it, or fold its long run into the next one. Long runs and the key workouts clearly matter most, but you'll be ranking them yourself, and reworking the weeks after a lost one is yours to do.

What the book does give you works well for a bad day. Besides the two optional days, nearly every run is a range, and the book tells you to take the low end when you're tired and to skip or move a key workout when the day goes wrong. Three of the long runs can also be swapped for a tune-up race.

Will it get you ready for race day?

The long run is the heart of marathon training. Runs longer than about 90 minutes teach your body things that shorter, faster sessions can't, and this plan is full of them. The Sunday runs climb to their peak in week 9, three weeks before race week, which leaves time to recover. So yes, this plan will get you ready, and then some.

The race-specific work is strong too. The Thursday goal-pace run grows from 6 to 8 miles, to 8 to 10, to 10 to 12. A midweek run that long at race effort is a big ask on its own, and by race day, holding that effort on tired legs feels familiar. Several long runs finish with 6 to 8 miles at goal pace as well. Tempo and steady runs lift the effort you can sustain, and running at that effort is what raises it. Then weeks 10 and 11 ease off and race week is light, and a taper like that tends to improve race performance by a few percent.

But the size of it is the gap. McMillan's logic is clear enough: an Endurance Monster's strength is mileage, so this version builds on what that runner does best. Still, the biggest week runs to about 66 miles, and the week 9 long run is set at 22 to 28 miles. The top of that range is longer than the marathon itself. Most runners at this level can be fully ready on less. The extra miles cost time and recovery, and if you're not already used to them, you may reach the taper worn down instead of fresh.

Are the workouts varied enough?

Yes. The plan mixes several kinds of running, and each one adds something.

Easy running carries most of the load and lets the body absorb the hard days. About 84 percent of this plan stays easy. Around it, the hard days keep changing: hill repeats, fartlek runs with short surges, progression runs that finish fast, tempo runs, fast half-mile repeats, and long blocks at goal pace.

The long runs vary too. Some are steady, some add surges, some alternate between two paces, and some finish at goal pace. For a runner who likes long and steady, that keeps the biggest day of the week from turning into the same run over and over. Strides, a handful of brief, loose sprints, are an option in the lighter weeks 4 and 8 and are on the schedule in race week, to keep your legs quick.