Four-Pace Zone Run: Structured 10km Progression Session

Session Overview

A structured 10km run that moves sequentially through all four training zones in timed blocks. This session teaches your body to shift gears efficiently and builds aerobic range — ideal for mid-season when your base is solid and race pace is within reach.

What You’ll Need

• Running shoes
• GPS watch with heart rate monitoring (recommended)
• Flat to gently rolling route of at least 4km in one direction
• Water bottle at start/finish for post-session hydration

Warm-Up (10 minutes)

10 minutes easy jogging at conversational pace (Zone 1, RPE 3–4). Finish with 4 x 20-second strides at around 85% effort, walking 30 seconds between each to activate your fast-twitch fibres before the structured blocks begin.

Main Set

Run each block back-to-back without stopping. Transitions between zones should be gradual — ease up or ease in over 30–60 seconds rather than changing pace abruptly:

• Block 1 — 10 minutes at Zone 2: easy aerobic pace, full conversation possible, RPE 4–5
• Block 2 — 10 minutes at Zone 3: steady/marathon pace, conversation becomes harder, RPE 5–6
• Block 3 — 10 minutes at Zone 4: threshold effort, only short phrases, RPE 7–8
• Block 4 — 5 minutes at Zone 5: race pace or slightly faster, breathing very hard, RPE 9

Cool-Down (5 minutes)

5 minutes easy jogging back down to Zone 1 or a brisk walk. Total session time is 50–55 minutes including warm-up. Stretch calves, hamstrings, and hip flexors afterwards.

Coaching Notes

• Use a GPS watch to keep honest splits — it’s easy to drift into Zone 4 too early during Block 2
• If heart rate is elevated from heat or fatigue, use RPE as your primary guide rather than pace
• To scale down: shorten each block to 7 minutes and drop Zone 5 entirely
• To scale up: after the cool-down, add a second pass through Zones 2–3 for an extra 20 minutes
• This session pairs well with a brick the following day — the Zone 4–5 work primes your legs for race-pace efforts off the bike