Running Plan Review Jack Daniels 2Q Marathon Training Plan, 86 to 100 Miles per Week

Does it build you up smartly?

Marathon training tends to work best in blocks: a base, a build, then race-specific work. Shifting the emphasis from block to block tends to beat holding one steady kind of training, though the edge the research finds is small. Daniels gets the order right here but tells you little about it, and that's where the plan loses ground.

This plan has blocks, even if the schedule never names them. Through week 14 the work leans on threshold running. In weeks 15 and 16 the emphasis turns toward quicker repeats and the plan's longest run at marathon effort.

The book explains what each kind of run is for, but the schedule passes little of that on. Fewer than half the hard sessions say what they're for.

Does it protect you from injury?

Mostly, and much of the protection comes from who the plan is for.

Big mileage sounds risky, but the research tends to point the other way. Runners who keep their weekly mileage high and steady tend to get hurt less, not more, though that evidence is observational. Expert guidance also holds, though no study has tested it, that a plan should start near the mileage you already run. This plan asks for exactly that: months at 80 miles or more before week 1. From there, the weekly total never jumps steeply, the 2 hard days are never back to back, and every hard session opens with easy running, anywhere from 2 to 10 miles of it.

But the breaks never come. Apart from a dip in week 17, the weekly total holds roughly level from week 3 to week 16, and both hard sessions arrive at full size every week until race week. Most plans pull back every 3 to 5 weeks, an interval set by coaching practice rather than research. When load keeps building with no relief, injury and illness risk tend to rise, and a fixed schedule is where that relief has to live. You'd feel it by week 12, when Monday is 22 miles and Thursday holds 8 miles at threshold, and your legs haven't had a lighter week since the plan began. Because you set the length of your own easy days, you could make a lighter week yourself, but nothing on the schedule says when.

And mileage alone doesn't measure your load. On this schedule, the weekly totals barely move, but the stress inside them does. In week 14, Monday's 21 miles hold 13 at marathon effort, and Thursday's ladder adds 10 miles at threshold. That costs far more than the same miles run easy, and the plan stacks weeks like it with no lighter one between them.

Strength is the other gap. The book lays out a strength program in its chapter on strength and time off, but the schedule never makes room for it. With a run every day and 2 long, hard sessions a week, when to fit it in is your call, and strength training lowers sport injury risk more than stretching or balance work does. In a plan this heavy, that's a real hole.

What happens when you miss a day?

Yes, as long as you're the one doing the replanning.

The paces travel well. Every hard run is pinned to an effort, from marathon effort to threshold to 5K effort, and the book's tables turn a single race result into a pace for each. After a lost week, race again, and the tables hand you paces that fit the runner you are now. For longer breaks, the book has tables for how far to step back. It also lets an easy day become a rest day now and then.

But the schedule itself has no give. The 2 hard days are numbered, and the numbering hints that Monday's comes first, but nothing says what to drop when a week goes wrong. Miss a Monday like week 8's and you've lost 20 miles with 12 at marathon effort, in a week where every day already holds a run. Move it to Tuesday, and Thursday's threshold repeats land 2 days later on tired legs. Drop it, and the build loses one of its biggest steps. Whatever room you find has to come out of the easy days.

Will it get you ready for race day?

A marathon asks for two things: endurance, and an effort you can hold for hours. This plan builds both, and its one weak spot is the final fortnight.

Early evidence links longer long runs with faster marathons, though no study has tested whether shorter, faster sessions could do the same job. Here every Monday is a long run, even the hard ones.

Marathon effort holds at about 12 miles a session through the first half, reaches 13 in week 14, and 16 without a break in week 16, 3 weeks out. Threshold running fills most weeks too, often dropped inside the marathon effort runs, so you learn to surge and settle back. For most recreational marathoners, marathon effort and threshold running are different kinds of training, and either is a reasonable way to prepare, so a plan heavy in both covers the ground.

But the threshold work runs too close to the race. 2 weeks out, the plan still holds 2 threshold sessions with 17 miles of threshold between them. The easy miles dip that week, but only race week lets the legs freshen up. Runners who cut their training by roughly 40 to 60 percent over the last 1 to 3 weeks, while keeping some faster running, race better than runners who keep training through. With the hard work held until the final week, most of that benefit has to come from race week alone.

Are the workouts varied enough?

Yes. Few weeks in this plan feel like the one before.

Around 4 of every 5 miles are easy, and easy miles are the base that carries the hard training. On top of them, the hard days come in many shapes: long runs at marathon effort, threshold miles dropped inside them, ladders of 4, 3, 2 and 1 miles at threshold, and repeats near 5K effort, sometimes followed by short, fast repeats near mile effort. Mixing clearly hard sessions into mostly easy running may build endurance a little better than steady, moderate running, and this plan never blurs the line between easy and hard.

The variety runs on a rhythm, too. The long easy run every third Monday turns the week's focus back to plain endurance before the next block of race-specific work, so the training never sits on one note for long.