{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T18:28:47Z","timestamp":1790101727517,"version":"4.0.1"},"reference-count":45,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2025,5,12]],"date-time":"2025-05-12T00:00:00Z","timestamp":1747008000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,5,12]],"date-time":"2025-05-12T00:00:00Z","timestamp":1747008000000},"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":[[2025,6]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:label\/>\n                    <jats:p>\n                      Aerobic fitness is crucial to team sport performance and can be practically estimated through field\u2010based assessments of maximal aerobic speed (MAS) in soccer players. However, method comparisons are underexplored. This study compared MAS estimation via a 6\u2010min distance trial (6minDT), 1800\u2010m time trial (1800mTT) and 30\u201015 intermittent fitness test (30\u201015IFT) and qualitative preferences in academy soccer players. Twenty\u2010six male players (age: 17.2\u00a0\u00b1\u00a00.6\u00a0years; stature: 178.4\u00a0\u00b1\u00a05.1\u00a0cm; body mass: 71.8\u00a0\u00b1\u00a07.7\u00a0kg) completed a 30\u201015IFT, 6minDT and 1800mTT in a counterbalanced order. Total distance was measured via 10\u00a0Hz global positioning system units, with MAS defined as 87% of 30\u201015IFT finishing speed (\n                      <jats:italic>v<\/jats:italic>\n                      IFT) and distance divided by time to completion for the 6minDT and 1800mTT. Pearson's correlations calculated associations between MAS estimates, and a robust repeated measures ANOVA estimated marginal mean differences between tests. A very large association was observed between performance in the 1800mTT and 6minDT (\n                      <jats:italic>r<\/jats:italic>\n                      \u00a0=\u00a00.72; 95% confidence interval, 0.46 to 0.86). Large associations were observed between the 30\u201015IFT and 6minDT and 1800mTT (6minDT:\n                      <jats:italic>r<\/jats:italic>\n                      \u00a0=\u00a00.65; 0.35 to 0.83; 1800mTT: 0.66, 0.37 to 0.84), respectively. MAS estimated from the 30\u201015IFT was significantly higher than the 6minDT (0.57, 0.50 to 0.65\u00a0m\u00b7s\n                      <jats:sup>\u22121<\/jats:sup>\n                      ,\n                      <jats:italic>p<\/jats:italic>\n                      \u00a0&lt;\u00a00.0001) and 1800mTT (0.45, 0.37 to 0.52\u00a0m\u00b7s\n                      <jats:sup>\u22121<\/jats:sup>\n                      ,\n                      <jats:italic>p<\/jats:italic>\n                      \u00a0&lt;\u00a00.0001). MAS estimated from the 6minDT was lower than the 1800mTT (\u22120.13, \u22120.21 to \u22120.05\u00a0m\u00b7s\n                      <jats:sup>\u22121<\/jats:sup>\n                      ,\n                      <jats:italic>p<\/jats:italic>\n                      \u00a0=\u00a00.0002). In conclusion, although associations between 6minDT\u2010, 1800mTT\u2010 and 30\u201015IFT\u2010derived MAS exist, all tests provide distinct estimations of MAS.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Trial Registration<\/jats:title>\n                    <jats:p>\n                      This study was pre\u2010registered on 11\/03\/2024. The preregistration for this study can be found on OSF registries at the following Registration DOI:\n                      <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"https:\/\/doi.org\/10.17605\/OSF.IO\/F3Z5U\">https:\/\/doi.org\/10.17605\/OSF.IO\/F3Z5U<\/jats:ext-link>\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/ejsc.12315","type":"journal-article","created":{"date-parts":[[2025,5,12]],"date-time":"2025-05-12T23:23:30Z","timestamp":1747092210000},"source":"Crossref","is-referenced-by-count":2,"title":["Estimating Maximal Aerobic Speed in Academy Soccer Players: A Comparison Between Time Trial Methods and the 30\u201015 Intermittent Fitness Test"],"prefix":"10.1002","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8804-7668","authenticated-orcid":false,"given":"Kieran","family":"Smith","sequence":"first","affiliation":[{"name":"Middlesbrough FC  Middlesbrough UK"},{"name":"School of Health and Life Sciences Teesside University  Middlesbrough UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4909-4162","authenticated-orcid":false,"given":"Matthew D.","family":"Wright","sequence":"additional","affiliation":[{"name":"School of Health and Life Sciences Teesside University  Middlesbrough UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9432-0675","authenticated-orcid":false,"given":"Paul","family":"Chesterton","sequence":"additional","affiliation":[{"name":"School of Health and Life Sciences Teesside University  Middlesbrough UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8016-1407","authenticated-orcid":false,"given":"Jonathan M.","family":"Taylor","sequence":"additional","affiliation":[{"name":"School of Health and Life Sciences Teesside University  Middlesbrough UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,5,12]]},"reference":[{"key":"e_1_2_15_2_1","doi-asserted-by":"publisher","DOI":"10.1177\/1754337120976660"},{"key":"e_1_2_15_3_1","doi-asserted-by":"publisher","DOI":"10.3389\/fspor.2020.549897"},{"key":"e_1_2_15_4_1","doi-asserted-by":"publisher","DOI":"10.3389\/fphys.2024.1376047"},{"issue":"7","key":"e_1_2_15_5_1","first-page":"60","article-title":"Review of the Literature Normative Data for Maximal Aerobic Speed for Field Sport Athletes: A Brief Review","volume":"23","author":"Baker D.","year":"2015","journal-title":"Journal of Australian Strength and Conditioning"},{"key":"e_1_2_15_6_1","doi-asserted-by":"publisher","DOI":"10.1123\/ijspp.1.1.50"},{"key":"e_1_2_15_7_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00421\u2010015\u20103233\u20106"},{"key":"e_1_2_15_8_1","doi-asserted-by":"publisher","DOI":"10.2165\/00007256\u2010200333060\u201000005"},{"key":"e_1_2_15_9_1","doi-asserted-by":"publisher","DOI":"10.1080\/2159676x.2019.1628806"},{"key":"e_1_2_15_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jml.2019.104047"},{"key":"e_1_2_15_11_1","doi-asserted-by":"publisher","DOI":"10.1519\/jsc.0b013e3181635b2e"},{"issue":"9","key":"e_1_2_15_12_1","first-page":"278","article-title":"The 30\u201315 Intermittent Fitness Test: 10 Year Review","volume":"1","author":"Buchheit M.","year":"2010","journal-title":"Myorobie J"},{"issue":"148","key":"e_1_2_15_13_1","first-page":"1","article-title":"The 30\u201015 Intermittent Fitness Test\u2014Two Decades of Learnings","volume":"1","author":"Buchheit M.","year":"2021","journal-title":"Sport Performance & Science Reports"},{"key":"e_1_2_15_14_1","doi-asserted-by":"publisher","DOI":"10.1007\/s40279\u2010013\u20100029\u2010x"},{"key":"e_1_2_15_15_1","doi-asserted-by":"publisher","DOI":"10.1080\/02640414.2013.792947"},{"key":"e_1_2_15_16_1","unstructured":"Catapult Sports.2023. \u201cVector Data Integrity.\u201d Accessed March 31 2025. 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