Zones 1 to 3 are the only steady-state zones, which means your physiology can reach a relative balance of supply and demand.

To start off, I put on a “Stryd” running power meter and did a few tests in the lab a couple of weeks before the race. Based on my data...

A simple way to check your training intensity distribution is to use your ‘time in zones’ for the last 28 - 90 days.

Running power meters such as Stryd can remove the pitfalls of heart rate and pace (GPS).

Pacing in endurance sport is one of the most essential aspects of performance. Regardless of your ability, if you start the race beyond your