That said, fatigue (or environmental conditions changes, or illness, or niggle) within the plan may impact testing performance. If auto-CP does not change over the course of 4 weeks or even 8 weeks, it does not mean that your fitness has not improved. It could simply mean that your test performances are confounded by these or other factors. (once again - do not change your Stryd weight setting throughout the course of the plan)

The progression in your long run duration, or in the duration/volume of intervals/tempo at a given intensity, are measures of your improving fatigue resistance.

Stryd PowerCenter provides various metrics that can further supplement your fitness tracking.

Stryd PowerCenter’s ‘Training Distribution’ chart can provide insights.

Track your training load metrics (such as PowerCenter’s “42-day avg” and RSB).

While auto-CP progression is fundamental in race performance between distances of 5K to the marathon, it is not the only measure of fitness progress.