Metric glossary
Form over the run (fatigue)
How your running form changed from the first third to the last third of a run.
- Pods needed
- Depends on the number (shins for most)
- Usual confidence
- Medium what this means
What it is
As you tire, form often changes: steps slow down, feet stay longer on the ground, the foot lands further forward, the knee straightens at landing, or you bounce more. This finding compares the first third with the last third of your running strides.
How we measure it
We take the middle value of each number in the first third and in the last third, and show start → end. We check:
- steps per minute (drop, %)
- time on the ground (rise, %)
- where your foot lands (rise, °)
- knee bend at landing (drop, °)
- bounce (rise, cm)
It needs at least 2.5 minutes of running.
Typical range
| Band | Change % | Change ° | Change cm |
|---|---|---|---|
| Good | 3 % or less | 2° or less | 0.7 cm or less |
| Watch | up to 6 % | up to 4° | up to 1.5 cm |
Bigger changes stay at "watch". A change is only shown when it is bigger than normal stride-to-stride variation.
How sure we are
Medium. Hills, stops and pace changes also change form, so compare steady runs. See how confidence works.
What you can try
Cue: "hold your cadence in the last third". Do a short form check-in every few km on long runs.
Good to know
Today the app compares thirds. Per-km splits and the exact km where form started to change are planned.
Updated 1 November 2026.
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ReadMyMove shows how you move. It does not assess injuries or health. If you have pain, see a health professional. If you're pain-free, there's no need to change something just because it differs from a typical range.