Running Plan Review Jack Daniels 2Q Marathon Training Plan, 41 to 55 Miles per Week

Does it build you up smartly?

Partly. The plan grows in the right direction, but it shifts its focus only in broad strokes and never tells you which stage you're in.

A marathon build usually moves through stages. Early weeks lean on one kind of hard work, later weeks shift to another, and the sessions nearest race day look most like the race itself. Plans that change their emphasis this way tend to race better than plans that keep the load the same throughout, though the edge is small.

This one changes its emphasis gradually rather than in clear blocks. Hard repeats arrive in week 4, marathon effort in week 5, and from then on threshold miles, repeats and marathon effort take turns until the taper. Week 7 and week 13 are nearly the same week, one a little smaller than the other. The rotation has its logic, since no kind of fitness goes untouched for long. But nothing on the schedule names a stage or says what it's building, so the shifts are yours to notice.

Still, the arc underneath is sound. Weekly running, the long run and the amount of hard work all climb through the middle of the plan before the taper. The start is gentle: 3 weeks of steady long runs and short threshold sessions before anything faster appears.

Does it protect you from injury?

Many running injuries seem to start suddenly, often right after a run that goes well past your recent longest, rather than building slowly over months. "We previously believed that injuries develop gradually over time," says Rasmus Nielsen, the Danish researcher who led that work, "but it turns out that many injuries occur because runners make training errors in a single training session." That makes the jump the thing to watch, since a sudden rise in running tends to raise injury risk.

This plan protects you well, with a couple of weak spots. Its hard days are well spaced, but its biggest jump lands early. In week 5 your running rises by about a fifth, and two new demands arrive in that same week: the first marathon-effort block, 8 miles of it after an hour of easy running, and the longest hard repeats so far. The mileage figure alone undersells a week like that, because the effort climbs along with the distance. If you start the plan near 35 miles a week, this is where it bites.

Breaks are scarce, too. In 16 weeks of building, week 11 is the only lighter week before the taper, and even that week keeps both hard days. Load that piles up without relief tends to raise the risk of injury and illness, so a plan you follow on your own needs a lighter week built in every few weeks. Weeks 5 through 10 run straight through without one. That's a surprise from a coach who preached rest. "My coach, Jack Daniels, always used to say that rest is a part of training. It's not avoiding training," recalls Olympic marathoner Magdalena Boulet, who trained under him.

Strength is left to you. The book lays out a program in the same chapter as its advice on time off, but the schedule never makes room for it, so you have to fit it beside two long hard days. That's a real gap, because strength training cuts injury risk more than stretching or balance work alone.

What the plan gets right is spacing. The two hard days never fall on consecutive days, with at least 2 easy days between them, and most weeks build gradually from the one before.

What happens when you miss a day?

Better at teaching than at adjusting. Most hard sessions come with a note on what they're for and how they should feel, so you can tell what Monday or Thursday is asking of you.

The easy days give the plan room to bend. Five days a week are easy running, and when a week gets crowded, an easy hour is the first thing to drop. Missing one costs little. The hard days are ranked, too: the book numbers them by priority, so in a week with room for only one, the first is the one to keep.

But the guidance runs out there. The schedule never spells out what else to trim or shorten in a short week, and a missed week gets no instructions at all, whether to repeat it, skip it, or fold its work into the next one. The book's tables cover longer layoffs, but the schedule assumes you run every day as written.

Because every day already holds a run, every shuffle also displaces something else. Move Thursday's repeats to Friday and Friday's easy hour needs a new home, and working that out is your job.

Will it get you ready for race day?

Two things carry a marathon. One is the long run, and early evidence suggests marathoners whose long runs go longer tend to finish faster, though nobody has tested whether shorter, harder sessions could stand in. The other is the effort you can hold for hours, which leans on your threshold: the effort you could sustain in a race of about an hour.

This plan gets the second right and falls short on the first. It also asks for more running than the goal needs. The biggest weeks come close to 60 miles, more than the 55 in the plan's name. That's more than most runners at this level need to race a marathon well, and every extra mile is tiredness you carry into the next hard day. Daniels himself urged runners to "train as easily as possible to achieve the benefits you are after," because "they usually give awards for faster race times, not for harder training sessions."

The long run has a ceiling as well. It's measured in time, not distance, and the steady ones top out at 150 minutes. The longest days on the calendar reach the high teens in miles, and nothing gets to 20. The plan builds them steadily, but race day will still take you well beyond anything you covered in training. For marathon great Eliud Kipchoge, a key session is "the long run, often of 40 km," about 25 miles, write two scientists who study elite runners.

Where the plan shines is the work itself. Threshold miles show up in most weeks, with some hard work aimed at the race in every one. For most recreational runners, marathon pace sits below threshold, so the plan also trains race effort directly: blocks of 8, 12 and 14 miles, and twice a block of 8 and then 6 with an easy mile between.

The order of those blocks is the surprise. The biggest, 14 miles, comes in week 7, twelve weeks before the race, and the later ones shrink and split. You learn the feel of race effort early, then practice finding it again when you're already tired. The final 2 weeks are lighter, and a taper like that tends to help runners race better.

Are the workouts varied enough?

Yes. The hard days cover a wide range, and the easy days carry most of the miles.

Endurance tends to grow a little better from easy running mixed with a few clearly hard sessions than from long stretches at one steady, middling effort. The easy miles are the base that carries the hard ones. Kenyan runners "are often mythologized for the high intensity of their training," but when sport scientists Stephen Seiler and Espen Tønnessen ran the numbers, Kenya's top 5K and 10K runners did about 85 percent of their running slower than threshold pace.

This plan gives you plenty of hard running. Over 18 weeks you'll run threshold repeats of 1, 2 and 3 miles, hard repeats of 3 and 4 minutes near 5K effort, and long blocks at marathon effort. The most distinctive session puts threshold miles before and after a full hour of easy running. The first set warms you up for the hour. The second set, on legs that have been running for well over an hour, is the real workout. About 84 percent of your miles are easy ones.

The schedule reads cleanly. Each hard day lists its warm-up, its repeats and its rests, and each one counts down the weeks left to the race.

The easy days earn their place by staying easy. Runners usually improve more when easy days are clearly easy and hard days clearly hard, and with just 2 hard days a week, this plan makes that line simple to keep.