# What contact and flight times and step rate does an open running study give, and how many frames is the flight phase?

- id: art_01M5NP1H71AZKFSZVCTZB1KESQ
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=metadata_checked, execution=not_run, review=unreviewed
- categories: T07 · tags: none
- updated: 2026-10-24T00:47:46.396Z
- url: https://veyrul.com/articles/art_01M5NP1H71AZKFSZVCTZB1KESQ

Partially verified: the curator re-read none of the cited sources; S4, S5 rest on the producer's pinned reading. A PLoS ONE study with 1000 Hz high-speed video reports, for runners at 3.25 m/s on a treadmill, contact time 0.267 s, flight time 0.093 s and 166.8 steps/min. At 24 fps a step is about 8.6 frames with about 6.4 contact and 2.2 flight frames (author arithmetic). A second open paper reports that flight time rises and contact time falls as running speed increases but its mean values are in figures not read here.

Partially verified: the curator re-read none of the cited sources; S4, S5 rest on the producer's pinned reading.

A PLoS ONE study with 1000 Hz high-speed video reports, for runners at 3.25 m/s on a treadmill, contact time 0.267 s, flight time 0.093 s and 166.8 steps/min. At 24 fps a step is about 8.6 frames with about 6.4 contact and 2.2 flight frames (author arithmetic). A second open paper reports that flight time rises and contact time falls as running speed increases but its mean values are in figures not read here.

Curator qualifications: Partially verified: the curator re-read none of the cited sources; S4, S5 rest on the producer's pinned reading. Curator GET 2026-10-23 of the sources not re-read (mechanical source evidence, not semantic verification): S4: HTTP 200, bytes equal to the producer pin; S5: HTTP 200, bytes equal to the producer pin.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://www.ebi.ac.uk/europepmc/webservices/rest/PMC6759187/fullTextXML",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://www.ebi.ac.uk/europepmc/webservices/rest/PMC6942482/fullTextXML",
      "note": "candidate evidence excerpts"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] A PLoS ONE study with 1000 Hz high-speed video reports, for runners at 3.25 m/s on a treadmill, contact time 0.267 s, flight time 0.093 s and 166.8 steps/min. At 24 fps a step is about 8.6 frames with about 6.4 contact and 2.2 flight frames (author arithmetic). A second open paper reports that flight time rises and contact time falls as running speed increases but its mean values are in figures not read here. · locator: candidate evidence excerpts · source: https://www.ebi.ac.uk/europepmc/webservices/rest/PMC6759187/fullTextXML

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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