Stage 4 of 8 · The Big Intervals

Run 4 × 5 minutes with only 90-second walks

Five-minute runs with only 90 seconds of walking never let your heart rate fully recover. That's deliberate: it teaches your body to keep running while mildly tired — the exact sensation of the back half of any race you'll run, met here in safe, fenced-off doses.

Who this stage is for

"I can run three minutes at a time" — if that's you, this is your starting stage.

The training week

Three sessions, at least a day apart, roughly half an hour each. Every session starts with a five-minute easy walk and ends the same way.

Run A · Key session — 4 × (5 min run / 90 s walk). Start each run slower than feels necessary.
walk 5 min, run 5 min, walk 1:30 min, run 5 min, walk 1:30 min, run 5 min, walk 1:30 min, run 5 min, walk 5 min
Run B · Surges — 6 × (2 min smooth run / 1 min walk). 'Smooth' means slightly quicker, never straining.
walk 5 min, pickup run 2 min, walk 1 min, pickup run 2 min, walk 1 min, pickup run 2 min, walk 1 min, pickup run 2 min, walk 1 min, pickup run 2 min, walk 1 min, pickup run 2 min, walk 5 min
Run C · Relaxed — 3 × (5 min run / 2 min walk) with the generous rests back.
walk 5 min, run 5 min, walk 2 min, run 5 min, walk 2 min, run 5 min, walk 5 min

Repeat weeks: Repeat weeks: extend Run A's runs by one minute each (5 → 6 → 7) while keeping the 90-second walks.

The test

Run 4 × 5 minutes with only 90-second walks.

If you need to stretch a walk break past 90 seconds, log it as a 'not yet' — the trend chart will show how close you came.

Coach's notes

The short 90-second walks are the point, not a flaw. Running on incomplete recovery in fenced-off doses teaches your body the exact sensation of a race's back half, months before you run one.

"Twenty minutes of running just happened inside one workout. You noticed, right?" — Coach

Safety