AI half-marathon coach

Train for 13.1 with a coach that dials in your threshold.

The half rewards sustained tempo and honest, even pacing more than any other distance. Vertical builds your plan around your real threshold, teaches race pace until it feels repeatable, and reshapes the week when life gets in the way.

No credit card required · Trusted by 200+ athletes

The gap

The half is won at threshold, and a PDF cannot see yours.

For most runners the half is lost to pacing, not a lack of fitness. You go out on adrenaline in the first 5k, bank time you think you need, and pay for it with a grim final 5k where the wheels come off. A generic plan cannot warn you, because it has no idea what pace you can actually hold. It hands you round numbers and hopes they fit.

The other gap is the work itself. The half sits right on your threshold, the effort you can hold for about an hour, and lifting that ceiling takes the right dose of tempo and cruise intervals week after week. Too little and race pace never feels controlled. Too much, too soon, and you arrive flat. Getting that balance right takes a coach that reads your training as it happens. A template printed before you ran a step cannot.

How Vertical coaches your half marathon

A plan built around the effort the half actually tests.

Threshold work, dosed to your fitness

Vertical derives your threshold from your watch data or a recent race, then progresses tempo runs and cruise intervals at the right effort. The dose grows as you adapt, so your sustainable pace keeps climbing week after week.

Long runs with a purpose

Vertical treats the long run as more than time on legs. It layers in blocks at goal pace and progressions that finish strong, teaching your body to hold effort when it is tired, which is exactly the bind you face in the final miles of 13.1.

Race pace that feels repeatable

The plan rehearses your target pace often enough that it stops feeling like a gamble on race day. Pair it with the free pace calculator and race pacing planner so your goal sits on your current fitness.

It reshapes around your real week

Sick for three days, traveling, or a session that felt far harder than the numbers suggest? Tell Vertical and it rebuilds the week for you. The plan bends to your life, so a rough stretch never quietly ends it.

The short version

What’s in your half marathon plan.

  • Threshold and tempo work progressed from your real fitness
  • Long runs with goal-pace segments and strong finishes
  • Even-pacing strategy so you do not blow up at 10 miles
  • Automatic reads from Garmin, COROS, Polar, or Suunto
  • A taper timed to leave you sharp and rested
AI half-marathon coach

Your tempo run held 4:15 pace with heart rate steady in your threshold zone, exactly the sustained effort the half rewards. Next week we stretch that block to 8k so goal pace starts to feel like cruising instead of pushing.

After your Thursday tempo · just now

In practice

From your first half to your fastest.

Stepping up from the 10K

If 13.1 is your next distance up, the jump is mostly about endurance at effort. Vertical extends your long runs sensibly and builds the threshold base the half demands, without turning easy days into a slog you cannot recover from.

Chasing a specific time

Targeting sub-1:45, sub-1:30, or a fresh PR? The plan works backward from that goal pace, checks it against what your data says is realistic, and rehearses it until race day feels like a repeat of training you have already done.

Training around a full life

When work travel or a bad night collides with your key session, you do not lose the week. Tell Vertical what happened and it reshuffles the priorities, protecting the threshold work that matters most while easing the rest.

How it works

From today to the start line.

01

Take the free assessment

Spend about two minutes connecting your watch or answering a few questions. You get a clear picture of where your fitness sits, what you are good at, what is holding you back, and the right next step. No card needed.

02

Get a plan from your real numbers

Vertical derives your threshold and paces from your data or a recent race, then periodizes the weeks from base through sharpening so the build peaks at the right time for your half.

03

Coach through every week by chat

Ask why a session is prescribed, how a run went, or what to do about a niggle. Vertical answers in plain language, drawing on your training and a library of 500-plus peer-reviewed studies.

04

Lock in your race pacing

As race week nears, use the pace calculator and race pacing planner to set an even-effort strategy for your course, so you run the smart 13.1 instead of the one adrenaline talks you into.

Common questions

How is this different from a free half marathon PDF plan?

A PDF is fixed the day it is printed and knows nothing about you. Vertical builds your plan from your actual threshold and paces, then adapts it as your training unfolds. Get sick or travel, and it reshapes the week for you.

How much threshold and tempo work will I actually do?

Enough to raise the pace you can hold for an hour, dosed to your own fitness. Vertical progresses tempo runs and cruise intervals as you adapt, and eases off when your data or how you felt says the load is too high.

How do I know my goal pace is realistic?

The assessment shows you where your current fitness sits, and the free pace calculator translates a recent race or your training data into an achievable half marathon target. If your goal is a stretch, Vertical says so and maps the path toward it.

What if I have only run 10Ks before?

That is a great starting point. The half is largely about holding effort longer, so Vertical extends your long runs gradually and builds the endurance base you need, without over-reaching. Many runners step up from 10K to their first strong half this way.

Which watches does it work with?

Garmin, COROS, Polar, and Suunto. Once connected, Vertical reads your runs automatically, so your threshold, paces, and progress stay current without any manual logging on your part.

Do I need to pay to see my plan?

The assessment is free and takes about two minutes with no card required. If you want the full plan plus daily coaching, there is an optional 7-day trial so you can experience the whole thing before deciding.

Get started

Run your smartest half marathon yet.

Get your free assessment in about two minutes, then your half marathon plan. No card required.

Free · About 2 minutes · Trusted by 200+ athletes