The marathon block: sixteen weeks your body has to agree to
The plan is written in advance. Your capacity to absorb it is decided night by night. How to run a block by Readiness and Load — and reach the start line ready, not merely finished.
Tafadzwa Moyo · 1 August 2026 · 7 min read
Most marathon blocks do not fail on race day. They fail quietly, somewhere around week nine — a cold that would not clear, a niggle that became a limp, three heavy weeks stacked on six bad nights. The plan was fine. The plan was also a guess about how you would absorb it.
The plan is a hypothesis
A training plan is written weeks in advance by someone who cannot see your sleep, your work deadlines or the taxi strike that turned Tuesday into a twelve-hour day. It assumes an average week. Readiness is the daily test of that assumption: it reads how you slept and how your heart recovered overnight, against your own baseline, and grades what today can absorb.
| Score | 54 of 100 |
|---|---|
| Zone | Moderate readiness |
| Meaning | How prepared your body is today, from sleep, resting heart rate and heart-rate variability. |
Run the hard days by the number
- Put quality where the Readiness is. Intervals and tempo belong on green mornings; moving a session two days is not weakness, it is scheduling.
- Keep the easy days genuinely easy. Load counts everything, including the 'recovery run' you accidentally raced.
- Watch Load against your own 14-day norm. The classic overreaching signature is Load creeping up while Readiness drifts down across three or four days. The fix is one easier day and one earlier night — taken immediately, not next week.
- Respect the long run's real cost. It shows up in tomorrow's numbers, not tonight's stiffness.
A taper you can see
The taper is where data earns its place. Volume falls, and for once the numbers should move in opposite directions: Load stepping down, week on week, while Readiness climbs. If Load is still flat ten days out, the taper is not happening — it is just a plan that says taper. If Readiness is not rising, look at your nights before you look at your legs.
Race week is a sleep event. The night before the race is usually nervous and short, and it matters far less than people fear. The bank is built Monday to Thursday — early nights, boring evenings, the same wake time. Kairo's brief will tell you whether the bank is filling.
You cannot cram fitness in the last three weeks. You can absolutely cram fatigue.
Tafadzwa Moyo, Head of Coaching Science
One honest note about pace
The band has no GPS of its own — your phone carries the map when you want one, and pace and distance sync when you are back in range. Kairo's job is the other twenty-three hours: whether the block is building you or burying you. That is the question that decides the last 10 km.
