{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T06:39:41Z","timestamp":1792478381264,"version":"4.5.0"},"reference-count":37,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T00:00:00Z","timestamp":1792368000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T00:00:00Z","timestamp":1792368000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["European Journal of Sport Science"],"published-print":{"date-parts":[[2026,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    This study examined wearable\u2010derived running power and biomechanical variables as indicators of durability during prolonged dual\u2010intensity exercise in trained trail runners. Twelve trained trail runners completed a 216\u2010min treadmill protocol of three repeated 72\u2010min blocks (60\u00a0min steady\u2010state running at 85% of lactate threshold speed plus a 12\u2010min uphill time trial [+12% incline]), plus an unfatigued control trial. A foot\u2010mounted running power metre (Stryd Next Gen, Stryd Inc., CO, USA; firmware version 2.1.32.1.1) continuously recorded power output, duty factor, ground contact time, form power, cadence, vertical oscillation and leg stiffness. Repeated\u2010measures ANCOVA with running speed as a covariate compared biomechanical across time trials at a common, model\u2010adjusted running speed. During the uphill time trials, duty factor, ground contact time, leg stiffness, vertical oscillation and form power changed significantly after controlling for speed (all\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0&lt;\u00a00.05;\n                    <jats:italic>\u03b7<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0=\u00a00.23\u20130.41), reflecting neuromechanical fatigue and a shift towards a lower\u2010stiffness, higher\u2010contact\u2010duration gait. In contrast, absolute power, normalised power and %CP declined in proportion to running speed and did not reach significance after covariate adjustment. During steady\u2010state running, biomechanical and physiological variables remained stable except duty factor, which increased modestly but significantly from 60 to 180\u00a0min (71.3\u00a0\u00b1\u00a01.6% to 72.7\u00a0\u00b1\u00a01.7%;\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0=\u00a00.014,\n                    <jats:italic>\u03b7<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0=\u00a00.32), the sole wearable\u2010detected indicator of mechanical drift at submaximal intensity. Running cost remained preserved throughout both exercise conditions. These findings suggest that the duty factor is the most sensitive wearable\u2010derived marker of fatigue\u2010related mechanical reorganisation during prolonged trail running, and that a wearable device can capture both the neuromechanical and performance dimensions of durability.\n                  <\/jats:p>","DOI":"10.1002\/ejsc.70275","type":"journal-article","created":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T05:52:32Z","timestamp":1792475552000},"source":"Crossref","is-referenced-by-count":0,"title":["Power\u2010Based Running Durability in Trained Runners: Preliminary Evidence of Speed\u2010Adjusted Mechanical Drift as a Marker of Fatigue"],"prefix":"10.1002","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5551-6037","authenticated-orcid":false,"given":"Antonio","family":"Cart\u00f3n\u2010Llorente","sequence":"first","affiliation":[{"name":"Faculty of Health Sciences Universidad San Jorge  Zaragoza Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7518-8234","authenticated-orcid":false,"given":"Felipe","family":"Garc\u00eda\u2010Pinillos","sequence":"additional","affiliation":[{"name":"Department of Physical Education and Sports Faculty of Sport Sciences University of Granada  Granada Spain"},{"name":"Sport and Health University Research Center (iMUDS) University of Granada  Granada Spain"},{"name":"Department of Physical Education Sports and Recreation Universidad de La Frontera  Temuco Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0588-0871","authenticated-orcid":false,"given":"Diego","family":"Ja\u00e9n\u2010Carrillo","sequence":"additional","affiliation":[{"name":"Department of Sport Science University of Innsbruck  Innsbruck Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,19]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1123\/ijspp.2025\u20100579"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1186\/s40798\u2010015\u20100007\u2010y"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1097\/00005768\u2010200001000\u201000012"},{"key":"e_1_2_11_5_1","volume-title":"Borg\u2019s Perceived Exertion and Pain Scales","author":"Borg G.","year":"1998"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.3389\/fphys.2018.01320"},{"key":"e_1_2_11_7_1","doi-asserted-by":"publisher","DOI":"10.1249\/mss.0000000000000929"},{"key":"e_1_2_11_8_1","doi-asserted-by":"publisher","DOI":"10.3758\/bf03193146"},{"key":"e_1_2_11_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.gaitpost.2018.11.037"},{"key":"e_1_2_11_10_1","doi-asserted-by":"publisher","DOI":"10.1519\/jsc.0000000000002595"},{"key":"e_1_2_11_11_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00421\u2010016\u20103437\u20104"},{"key":"e_1_2_11_12_1","doi-asserted-by":"publisher","DOI":"10.1152\/japplphysiol.00546.2015"},{"key":"e_1_2_11_13_1","doi-asserted-by":"publisher","DOI":"10.1080\/02640414.2025.2567780"},{"key":"e_1_2_11_14_1","doi-asserted-by":"publisher","DOI":"10.3390\/sports8070103"},{"key":"e_1_2_11_15_1","doi-asserted-by":"publisher","DOI":"10.1123\/ijspp.2025\u20100607"},{"key":"e_1_2_11_16_1","doi-asserted-by":"publisher","DOI":"10.1111\/sms.70299"},{"key":"e_1_2_11_17_1","doi-asserted-by":"publisher","DOI":"10.3390\/s26103244"},{"key":"e_1_2_11_18_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00421\u2010025\u201005840\u2010z"},{"key":"e_1_2_11_19_1","article-title":"Stryd Biomechanical Parameters as Indicators of Running Economy and Performance","author":"Ja\u00e9n\u2010Carrillo D.","year":"2024","journal-title":"Proceedings of the Institution of Mechanical Engineers, Part P, Journal of Sports Engineering and Technology"},{"key":"e_1_2_11_20_1","volume-title":"Sport Nutrition","author":"Jeukendrup A.","year":"2019"},{"key":"e_1_2_11_21_1","doi-asserted-by":"publisher","DOI":"10.1113\/jp284205"},{"key":"e_1_2_11_22_1","doi-asserted-by":"publisher","DOI":"10.14814\/phy2.14098"},{"key":"e_1_2_11_23_1","doi-asserted-by":"publisher","DOI":"10.1152\/jappl.1991.70.2.683"},{"key":"e_1_2_11_24_1","doi-asserted-by":"publisher","DOI":"10.1055\/s\u20102003\u201042020"},{"key":"e_1_2_11_25_1","doi-asserted-by":"publisher","DOI":"10.1111\/sms.12057"},{"key":"e_1_2_11_26_1","doi-asserted-by":"publisher","DOI":"10.1007\/s40279\u2010021\u201001459\u20100"},{"issue":"6","key":"e_1_2_11_27_1","doi-asserted-by":"crossref","first-page":"793","DOI":"10.1007\/s40279-016-0474-4","article-title":"Is There an Economical Running Technique? 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