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

Does it build you up smartly?

Partly. The training comes in a smart order, but the schedule is thin, and its lighter weeks hardly lighten.

The order is right. The hard work changes as the race gets closer: hills and short fartlek first, then progression runs and tempo, then long stretches at goal pace. Plans that shift their emphasis in blocks like this race better than plans that keep the same load throughout, and the order suits this runner, who needs race-pace work most and gets the most of it at the end.

But the schedule gives you the workout and nothing more. Week 1's Tuesday is 6 or 7 surges of 2 minutes, with 2 minutes of jogging between them, and nothing on the schedule says how hard the surges should feel or why they're there. No hard day has a warm-up written on it either. The book explains the workouts in a separate chapter, so every session is something you look up before you run it.

The other gap is rest. The book allows a down week every fourth week, and weeks 4 and 8 do cut back in places: Tuesday's hard session becomes an easy run with optional strides, the easy runs get shorter, and week 4's long run drops to 90 minutes. But each of those weeks keeps a big goal-pace session, and week 8 still has a long run of 14 to 18 miles. The easy days shrink; the week doesn't. Lighter weeks matter because they're when built-up fatigue clears and the body absorbs the work before it. Until the taper starts in week 11, that chance doesn't come.

Does it protect you from injury?

For an Endurance Monster, the miles won't be the problem. This runner's legs are used to volume. The risk is the extra intensity landing on top of it, because weekly mileage misses much of the strain that faster running adds. Two weeks with the same mileage can ask very different things of your legs.

On most of the basics, this plan protects you well. There's no sudden spike in training anywhere in the 12 weeks, and the hard days are always kept apart, with an easy or optional day between them. The book also teaches the warning signs of trouble and how to respond to them. That matters, because a lingering niggle appears to raise the odds of a full injury that stops you running.

But strength isn't on the schedule. The book includes a sample routine and points you to a full program online, and none of it appears on the calendar, so finding days for it is your job. That's a real gap, because strength training substantially lowers injury risk in sport, more than stretching does.

The build itself has a fault too, and it's the one that matters most for this runner. Weekly mileage rises in a sawtooth that jumps by 13 to 16 percent in weeks 5, 7 and 9, and new workouts tend to arrive in those bigger weeks. The first progression run comes in week 3 as the mileage climbs, and the first tempo intervals land in week 5, when the total rises about 16 percent. Weeks 5, 7 and 9 also stack 3 hard days: Tuesday, Thursday, and a long run that finishes at tempo or goal pace. With no real lighter week until week 11, those are the weeks to treat with the most care.

What happens when you miss a day?

Better than the schedule alone suggests, but the plan has no rule for a missed week.

Most of the give lives in the book. Easy runs are ranges of minutes, and McMillan tells you to take the low end when you're tired. On a bad day, he lets you skip a key workout or move it, and the open days on Monday and Friday mean a session can slide by a day without crowding the next one. Every workout is described by effort as well as pace, using 4 training zones adapted from his mentor David Martin, and the book teaches what each kind of run is for.

But when a whole week falls apart, you're on your own. The long run and the 2 harder sessions clearly matter most, but there's no ranked order to fall back on, and nothing about whether a lost week should be repeated or written off. That bites hardest in the final build, where goal-pace sessions come every week. Lose 4 days to a cold in week 8, and whether 2 repeats of 4 miles at goal pace still belong in that week, or should wait for week 9's shorter repeats, is up to you.

A careful reader can make those calls well, because the book explains the reasons behind the workouts. They're still yours to make.

Will it get you ready for race day?

Fitness is usually measured on fresh legs. A half marathon gets decided later, in the final few miles, when you've been running for an hour or more and the question is how much speed is left. Coaches prepare runners for those miles with training at threshold and at race pace, and threshold gains are specific to the pace you train at.

Yes, this plan prepares you for exactly that, and the race-pace work grows as the race gets closer. Goal pace first appears in week 4 as repeats of 3 miles, and by week 10 it's 6 to 8 miles at goal pace without a break. Alongside, the long runs in weeks 7, 9 and 11 end with 2 to 4 miles at goal pace, the closest thing in training to the last miles of the race. For an Endurance Monster, those finishes are the most useful runs in the plan.

The long run goes well past race distance, to 14 to 18 miles in weeks 8 and 10, so 13.1 miles sits well inside what you've already run. Then weeks 11 and 12 ease off, with race week down to about a third of the biggest week, and a structured taper of 1 to 3 weeks improves race performance compared with training straight through. Each of the 3 finishing long runs can also be swapped for a 5K to 10K tune-up race, which doubles as a check on whether your goal is right.

Are the workouts varied enough?

Yes. Each block brings new kinds of hard running, and about 85 percent of the miles are easy.

The early weeks lean on the short, fast end: hill repeats of 60 to 75 seconds and brief fartlek surges. That's the speed this runner tends to lack, and it comes first, while the legs are fresh. Work like this is aimed at running economy, how efficiently you move at speed, and short, fast efforts tend to improve economy in distance runners.

The easy running is where the base that carries the hard work gets built. Steady running is kept to a few set sessions, like week 10's 80 to 90 minute Tuesday, rather than leaking into every day, and a mix of easy miles and distinctly hard sessions builds endurance better than long stretches of moderate running.

For a runner who already loves the long, steady miles, that range is what makes the plan worth running. Most weeks, Tuesday and Thursday ask for 2 different things, and the long run often asks for a third.