Marathon training

By Coach Kamau Waweru

DO YOU REALLY HAVE TO RUN 6–7 DAYS A WEEK TO BREAK 3 HOURS?

Not necessarily. A marathon is not won by the number of days you run. It is won by developing the physiological adaptations required to sustain approximately 4:15/km for 42.2 km. In principle, a runner with an established aerobic base can train 3 times per week for 8 weeks, provided those sessions are intelligently structured to target the major determinants of marathon performance.

There is no magic. There is physiology + specificity + consistency.

What does the marathon actually require? Three major physiological characteristics are repeatedly identified in the scientific literature:

1. VO₂max ( aerobic power). This determines the upper limit of the body's ability to use oxygen. You don't necessarily need to maximize VO₂max. You need enough aerobic capacity so that marathon pace represents a manageable fraction of your maximum.

2. Lactate threshold ( sustainable aerobic intensity): This determines how fast you can run before metabolic disturbance begins to rise rapidly. Training around threshold improves your ability to sustain a high percentage of your aerobic capacity without accumulating fatigue too quickly.

3. Running economy: This is hugely important. Two runners can have similar VO₂max values but require different amounts of oxygen to run at 4:15/km. The runner who uses less oxygen at the same pace is effectively more economical. That means: Less energy cost → less glycogen consumption → less muscular fatigue → better ability to maintain pace late in the marathon. These three factors are central to marathon performance.

So what could 3 runs per week look like?

SESSION 1 — THRESHOLD:

Example: 3 × 3–4 km around threshold with controlled recovery. Purpose:

• Raise lactate threshold.
• Improve aerobic metabolic capacity.
• Increase sustainable running speed.
• Improve tolerance to prolonged work.

SESSION 2 — MARATHON-SPECIFIC WORK:

Example: 2–3 × 5–8 km around marathon pace: or a progression such as: 10 km easy + 10–12 km around MP + 3–5 km controlled

Purpose:

• Improve running economy at marathon pace.
• Develop specific muscular endurance.
• Teach the body to maintain economical mechanics under fatigue.
• Practice fueling and pacing.

SESSION 3 — LONG RUN

25–35 km depending on experience and training history. Some weeks can include controlled marathon -pace work inside the long run.

Purpose:

• Increase peripheral endurance.
• Improve fatigue resistance.
• Develop muscular durability.
• Practice carbohydrate utilization and fueling.
• Build psychological confidence.

Long runs are particularly useful because the marathon is not simply an aerobic test,it is also a prolonged muscular and metabolic stress.

BUT HERE IS THE IMPORTANT PART:

Three runs per week does NOT mean three hard runs. The quality of the sessions must be carefully controlled. & an 8-week block doesn't create years of aerobic development overnight. The 8 weeks are better understood as a specific adaptation block placed on top of an existing endurance base.

That distinction matters.

A runner with years of consistent training can potentially respond dramatically to a short, highly specific block.

A runner starting from low mileage cannot simply copy the same 8-week program and expect the same result.

The real principle:

You don't train to collect running days.

You train to create adaptations. If the available training time is limited, every session should have a physiological purpose:

VO₂max → threshold → economy → muscular endurance → marathon specificity → fueling → fatigue resistance.

Research also supports the idea that lower-frequency marathon programs can work when the three sessions are appropriately designed; established 3-day programs commonly combine an interval session, tempo/threshold work and a long run.

So the question shouldn't simply be:

"How many days do I run?"

The better question is:

"Have I trained the systems that allow me to run 42.2 km at 4:15/km?"

That's the science.

No magic. No secret workout. Correct stimulus + recovery + adaptation + consistency.

And when the aerobic foundation is already there, sometimes 8 weeks of highly specific training can reveal fitness that was already waiting to be expressed. STAY HARD.