Training Pace Zones Calculator
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Threshold pace (per km)
How training pace zones work
Enter your threshold pace — roughly the pace you could hold for an hour — and the calculator derives easy, marathon, threshold, interval and repetition paces as ranges around it.
Frequently asked questions
- What is threshold pace?
- Threshold pace is the fastest pace you can sustain for about an hour, near your lactate threshold.
- Why train in zones?
- Different paces develop different systems; mixing easy, threshold and interval work builds fitness while limiting injury risk.