---
_id: '59599'
abstract:
- lang: eng
  text: 'Background: Agility is crucial in game sports, requiring both motor and cognitive
    skills. Athletes must perceive and process information to adapt movements, yet
    traditional agility tests often lack cognitive and multidirectional demands. Additionally,
    modern test systems are mostly stationary. This study evaluated the novel and
    portable “Functional Agility Square Test” (FAST) for validity, reliability, and
    usefulness. Methods: To assess discriminant validity, 22 game sports (GS) and
    22 non-game sports (NGS) athletes participated in one session. Test–retest reliability
    was examined with 36 GS athletes (20 female) across three sessions. Participants
    performed cognitive (FAST_COG), preplanned (FAST_MOT), and randomized (FAST_SAT)
    reactive change-of-direction tasks, each repeated three times per session. Results:
    Results showed significantly lower response times (RTs) in GS compared to NGS
    (p < 0.05). Mean RTs indicated moderate relative reliability (ICC 0.50–0.74),
    while medians showed moderate to good reliability (ICC 0.59–0.83). Usefulness
    was evident from the first session (FAST_MOT) or from the third session (FAST_SAT)
    based on median RTs. Conclusions: Thus, the FAST seems to be valid, reliable,
    and sensitive for GS-based agility assessment. Its portable setup enables ecologically
    valid field testing. Future research should further increase task complexity to
    better simulate game conditions.</jats:p>'
article_number: '126'
author:
- first_name: Romina Desiree
  full_name: Müller, Romina Desiree
  id: '62569'
  last_name: Müller
- first_name: Daniel
  full_name: Büchel, Daniel
  id: '41088'
  last_name: Büchel
- first_name: Jochen
  full_name: Baumeister, Jochen
  id: '46'
  last_name: Baumeister
  orcid: 0000-0003-2683-5826
citation:
  ama: Müller RD, Büchel D, Baumeister J. Validation, Reliability, and Usefulness
    of the Functional Agility Square Test [FAST]. <i>Journal of Functional Morphology
    and Kinesiology</i>. 2025;10(2). doi:<a href="https://doi.org/10.3390/jfmk10020126">10.3390/jfmk10020126</a>
  apa: Müller, R. D., Büchel, D., &#38; Baumeister, J. (2025). Validation, Reliability,
    and Usefulness of the Functional Agility Square Test [FAST]. <i>Journal of Functional
    Morphology and Kinesiology</i>, <i>10</i>(2), Article 126. <a href="https://doi.org/10.3390/jfmk10020126">https://doi.org/10.3390/jfmk10020126</a>
  bibtex: '@article{Müller_Büchel_Baumeister_2025, title={Validation, Reliability,
    and Usefulness of the Functional Agility Square Test [FAST]}, volume={10}, DOI={<a
    href="https://doi.org/10.3390/jfmk10020126">10.3390/jfmk10020126</a>}, number={2126},
    journal={Journal of Functional Morphology and Kinesiology}, publisher={MDPI AG},
    author={Müller, Romina Desiree and Büchel, Daniel and Baumeister, Jochen}, year={2025}
    }'
  chicago: Müller, Romina Desiree, Daniel Büchel, and Jochen Baumeister. “Validation,
    Reliability, and Usefulness of the Functional Agility Square Test [FAST].” <i>Journal
    of Functional Morphology and Kinesiology</i> 10, no. 2 (2025). <a href="https://doi.org/10.3390/jfmk10020126">https://doi.org/10.3390/jfmk10020126</a>.
  ieee: 'R. D. Müller, D. Büchel, and J. Baumeister, “Validation, Reliability, and
    Usefulness of the Functional Agility Square Test [FAST],” <i>Journal of Functional
    Morphology and Kinesiology</i>, vol. 10, no. 2, Art. no. 126, 2025, doi: <a href="https://doi.org/10.3390/jfmk10020126">10.3390/jfmk10020126</a>.'
  mla: Müller, Romina Desiree, et al. “Validation, Reliability, and Usefulness of
    the Functional Agility Square Test [FAST].” <i>Journal of Functional Morphology
    and Kinesiology</i>, vol. 10, no. 2, 126, MDPI AG, 2025, doi:<a href="https://doi.org/10.3390/jfmk10020126">10.3390/jfmk10020126</a>.
  short: R.D. Müller, D. Büchel, J. Baumeister, Journal of Functional Morphology and
    Kinesiology 10 (2025).
date_created: 2025-04-16T09:15:59Z
date_updated: 2025-04-16T09:19:31Z
doi: 10.3390/jfmk10020126
intvolume: '        10'
issue: '2'
language:
- iso: eng
publication: Journal of Functional Morphology and Kinesiology
publication_identifier:
  issn:
  - 2411-5142
publication_status: published
publisher: MDPI AG
status: public
title: Validation, Reliability, and Usefulness of the Functional Agility Square Test
  [FAST]
type: journal_article
user_id: '62569'
volume: 10
year: '2025'
...