Metric glossary
Trunk lean
How far your upper body leans forward while you run, compared with standing.
- Pods needed
- A chest pod plus a shin or foot pod
- Usual confidence
- Low what this means
What it is
Trunk lean is the average forward angle of your upper body during running strides, in degrees, compared with your standing posture.
How we measure it
A pod on the chest (on the breastbone) tracks its tilt 100 times a second. Shin or foot pods mark each stride. Stand still for 3 seconds at the start; without it, this number is hidden.
Typical range
There is no band. It is a detail number and is not used for advice yet. A small forward lean is common; it grows when running uphill or accelerating.
How sure we are
Low. Read it as an estimate and compare it only with your own runs. See how confidence works.
What you can try
Nothing to change on its own. Some coaches use the cue "lean from the ankles" with a falling-start drill: stand tall, lean forward as one piece until you have to step, then run 10 m.
Good to know
A chest pod is not part of the standard running setup. See how many pods you need.
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.