{
  "abstract": "Markerless (ML) motion capture is a practical alternative to marker-based (MB) systems, yet its ability to estimate joint kinetics during team sport-specific movements remains unclear. This study evaluated the agreement between ML and MB lower extremity joint moment estimates during change-of-direction (COD) tasks. Nineteen team sport athletes performed straight running and four COD movements (45-, 90-, 135-, 180-degrees) at different speeds. Joint moments at the hip, knee, and ankle were computed from synchronized force-plate data and either ML video data (Theia3D) or MB motion-capture data. Agreement was assessed using an extended Bland–Altman approach with linear mixed-effects models for peak joint moments and bootstrapped functional prediction bands for the entire stance phase. Substantial random and systematic differences were observed between systems exceeding the defined threshold of ≤ 10% in relative limits of agreement (LoAs) and in average MB signal range × 100% stance. LoAs for peak joint moments ranged from ± 0.38 Nm/kg at the ankle to ± 1.21 Nm/kg at the hip, indicating that difference between systems was of similar magnitude to, or larger than, the underlying MB-derived peak moments. Relative random differences ranged from 92 to 128% across movement planes. Agreement did not show a consistent pattern across movement directions or direction-specific speed categories. These findings indicate that ML- and MB-derived joint kinetics cannot be used interchangeably.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "name": "Janina Helwig",
      "orcid": "0000-0001-9467-8506"
    },
    {
      "name": "Jos Vanrenterghem"
    },
    {
      "name": "Daniel Koska"
    },
    {
      "name": "Albert Gollhofer"
    },
    {
      "name": "Steffen Willwacher"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1gdq784shfqhn.bib",
  "cited_by": 0,
  "doi": "10.1038/s41598-026-72910-3",
  "fulltext_url": null,
  "id": "1gdq784shfqhn",
  "issns": [
    "2045-2322"
  ],
  "landing_url": "https://www.nature.com/articles/s41598-026-72910-3",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2204|Lower Extremity Biomechanics and Pathologies"
    ]
  ],
  "openalex": "W7220833248",
  "pdf_url": "https://www.nature.com/articles/s41598-026-72910-3.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-07",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/1gdq784shfqhn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:24Z",
      "native_id": "10.1038/s41598-026-72910-3",
      "source": "crossref",
      "url": "https://www.nature.com/articles/s41598-026-72910-3"
    }
  ],
  "subjects": [],
  "title": "Agreement of markerless and marker-based joint kinetics in team sport-specific change-of-direction movements",
  "title_text": "Agreement of markerless and marker-based joint kinetics in team sport-specific change-of-direction movements",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:24Z",
  "url": "https://research.draconitic.com/paper/1gdq784shfqhn",
  "venue": "Scientific Reports",
  "versions": []
}