{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,26]],"date-time":"2026-02-26T06:38:19Z","timestamp":1772087899889,"version":"3.50.1"},"reference-count":60,"publisher":"Human Kinetics","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,2,1]]},"abstract":"<jats:p>\n                    <jats:italic>\n                      <jats:bold>Purpose<\/jats:bold>\n                      :\n                    <\/jats:italic>\n                    Given the growing evidence of the importance of durability in endurance performance, this study aimed to investigate the reliability of a triathlon-specific test protocol for assessing physiological determinants of fatigued running performance, that is, after strenuous cycling in well-trained triathletes of both sexes.\n                    <jats:italic>\n                      <jats:bold>Methods<\/jats:bold>\n                      :\n                    <\/jats:italic>\n                    On 2 occasions, 10 triathletes (5 females; maximal oxygen uptake [\n                    <jats:inline-formula\/>\n                    ] 60.4 [6.0]\u00a0mL\u00b7min\n                    <jats:sup>\u22121<\/jats:sup>\n                    \u00b7kg\n                    <jats:sup>\u22121<\/jats:sup>\n                    ) completed an incremental cycling test (\u223c2\u00a0W\u00b7kg\n                    <jats:sup>\u22121<\/jats:sup>\n                    , +20\u00a0W, 3\u00a0min) to exhaustion followed by a constant-workload segment at 85% of power at lactate threshold 2 (LT2) to reach 20\u00a0kJ\u00b7kg\n                    <jats:sup>\u22121<\/jats:sup>\n                    (males) or 15\u00a0kJ\u00b7kg\n                    <jats:sup>\u22121<\/jats:sup>\n                    (females) of total mechanical work. Subsequently, they performed an incremental running test to exhaustion (2.8\u00a0m\u00b7s\n                    <jats:sup>\u22121<\/jats:sup>\n                    , +0.4\u00a0m\u00b7s\n                    <jats:sup>\u22121<\/jats:sup>\n                    , 5\u00a0min\u2009+\u200930-s rest) to assess fatigued\n                    <jats:inline-formula\/>\n                    , oxygen cost, and lactate thresholds. Energy expenditure and carbohydrate\/fat oxidation were calculated during all submaximal work rates.\n                    <jats:italic>\n                      <jats:bold>Results<\/jats:bold>\n                      :\n                    <\/jats:italic>\n                    All diagnostic determinants of fatigued running performance showed good to excellent reliability (intraclass correlation coefficient [ICC]\u2009\u2265\u2009.845), except for fractional utilization of\n                    <jats:inline-formula\/>\n                    at LT2 (ICC\u2009=\u2009.193), along with small measurement errors (typical error\u2009\u2264\u20093.6%) for all determinants. In contrast to the excellent reliability of energy expenditure during constant-workload cycling (ICC\u2009=\u2009.940, typical error\u2009=\u20093.4%), substrate oxidation demonstrated limited reliability during constant cycling and submaximal fatigued running (ICC\u2009=\u2009.560\u2013.928, typical error\u2009=\u20096.3%\u201319.6%).\n                    <jats:italic>\n                      <jats:bold>Conclusion<\/jats:bold>\n                      :\n                    <\/jats:italic>\n                    The triathlon-specific test protocol demonstrated high reliability for measures of\u00a0fatigued running performance, comparable to fresh measurements in previous reliability studies, making it suitable for regular evaluation of triathletes.\n                  <\/jats:p>","DOI":"10.1123\/ijspp.2025-0240","type":"journal-article","created":{"date-parts":[[2026,1,6]],"date-time":"2026-01-06T06:31:20Z","timestamp":1767681080000},"page":"322-329","source":"Crossref","is-referenced-by-count":1,"title":["Reliability of a Triathlon-Specific Test Protocol to Assess Physiological Determinants of Fatigued Running Performance"],"prefix":"10.1123","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6845-9067","authenticated-orcid":true,"given":"Sebastian","family":"Keller","sequence":"first","affiliation":[{"name":"Section Exercise Physiology, German Sport University, Cologne, Germany"},{"name":"German Research Centre of Elite Sport, German Sport University, Cologne, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-0986-8613","authenticated-orcid":true,"given":"Greta","family":"R\u00f6hrs","sequence":"additional","affiliation":[{"name":"Section Exercise Physiology, German Sport University, Cologne, Germany"},{"name":"German Research Centre of Elite Sport, German Sport University, Cologne, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8682-5916","authenticated-orcid":true,"given":"Patrick","family":"Wahl","sequence":"additional","affiliation":[{"name":"Section Exercise Physiology, German Sport University, Cologne, Germany"},{"name":"German Research Centre of Elite Sport, German Sport University, Cologne, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"100","reference":[{"issue":"8","key":"r1","series-title":"Sports Med","doi-asserted-by":"publisher","first-page":"1619","DOI":"10.1007\/s40279-021-01459-0","article-title":"The importance of \u201cdurability\u201d in the physiological profiling of endurance athletes","volume":"51","author":"Maunder E","year":"2021","unstructured":"Maunder E, Seiler S, Mildenhall MJ, Kilding AE, Plews DJ. 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