{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T01:53:06Z","timestamp":1790819586476,"version":"4.1.0"},"reference-count":25,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T00:00:00Z","timestamp":1783468800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100015351","name":"Universit\u00e4tsbibliothek Bielefeld","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100015351","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Physiol."],"abstract":"<jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>HYROX is a rapidly growing fitness format combining 8\u00a0km of running with 8 standardized workout stations. Despite its rapid growth, empirical evidence on performance correlates of success remains scarce. The purpose of this study is to investigate overall performance and its evolution as well as the specific contributions of the different components of individual performance in HYROX PRO and ELITE races.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>The analysis is based on publicly available data about race results (females: n = 11,842; males: n = 27,854) from individual PRO and ELITE competitions from the first seven seasons (2018\/19-2024\/25). Empirical cumulative distribution functions were used to derive season-specific percentile curves of PRO results. Changes in discipline performance were assessed for the top 100 results per season. Discipline importance was further examined using rank-based reshuffling metrics and quantile regression models. ELITE performance trends, performance convergence and Top-5 retention were additionally analyzed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Between seasons 4-7, male and female PRO performances improved by ~8-10 min at the median, with larger gains at the 25\n                      <jats:sup>th<\/jats:sup>\n                      -75\n                      <jats:sup>th<\/jats:sup>\n                      percentiles than at the 90\n                      <jats:sup>th<\/jats:sup>\n                      percentile. In the Top 100, total race time improved by ~13 min (\u224819%) in males and ~17min (\u224821%) in females between seasons 1-7. These improvements were largely associated with faster running (males: ~8 min; females: ~10 min), which consistently accounted for ~50% of total race time and showed a low discrepancy between discipline-specific and overall rankings. Strength-determined stations exhibited greater rank reshuffling and stronger quantile-dependent effects, indicating larger absolute increases in total race time among slower performers. ELITE median performance improved from 01:06:24 to 00:57:17 h in males and from 01:11:09 to 01:03:22 h in females, while the coefficient of variation declined from &amp;gt;10% to &amp;lt;5%, indicating increasing competitive density.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion<\/jats:title>\n                    <jats:p>HYROX has rapidly evolved into a highly competitive, sport in which overall performance is most strongly associated with running performance, alongside meaningful contributions from the strength-based stations.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fphys.2026.1847569","type":"journal-article","created":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T04:34:35Z","timestamp":1783485275000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Longitudinal performance development in PRO and ELITE HYROX competitions across the first seven competitive seasons"],"prefix":"10.3389","volume":"17","author":[{"given":"Ludwig","family":"Rappelt","sequence":"first","affiliation":[{"name":"Department of Applied Exercise Science, German Sport University Cologne","place":["Cologne, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tim","family":"Wiedenmann","sequence":"additional","affiliation":[{"name":"Department of Applied Exercise Science, German Sport University Cologne","place":["Cologne, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steffen","family":"Held","sequence":"additional","affiliation":[{"name":"Department of Sport and Management, IST University of Applied Sciences","place":["D\u00fcsseldorf, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lars","family":"Heinke","sequence":"additional","affiliation":[{"name":"Department of Movement and Training Science, University of Wuppertal","place":["Wuppertal, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Florian","family":"Micke","sequence":"additional","affiliation":[{"name":"Department of Sport and Management, IST University of Applied Sciences","place":["D\u00fcsseldorf, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pamela","family":"Wicker","sequence":"additional","affiliation":[{"name":"Department of Sports Science, Bielefeld University","place":["Bielefeld, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lars","family":"Donath","sequence":"additional","affiliation":[{"name":"Department of Applied Exercise Science, German Sport University Cologne","place":["Cologne, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,7,8]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"779","DOI":"10.2165\/11317780-000000000-00000","article-title":"The quantification of training load, the training response and the effect on performance","volume":"39","author":"Borresen","year":"2009","journal-title":"Sports Med."},{"key":"B2","doi-asserted-by":"publisher","DOI":"10.3389\/fphys.2025.1519240","article-title":"Acute physiological responses and performance determinants in Hyrox\u00a9 \u2013 a new running-focused high intensity functional fitness trend","volume":"16","author":"Brandt","year":"2025","journal-title":"Front. 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