{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,11]],"date-time":"2026-04-11T11:54:49Z","timestamp":1775908489923,"version":"3.50.1"},"reference-count":28,"publisher":"Human Kinetics","issue":"9","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,9,1]]},"abstract":"\n \n Purpose<\/jats:bold>\n :\n <\/jats:italic>\n We examined changes in stride temporal parameters and spring-mass model characteristics during repeated sprints following a 3-week period of \u201clive high\u2013train low and high\u201d (LHTLH)\u00a0altitude training in team-sport players.\n \n Methods<\/jats:bold>\n :\n <\/jats:italic>\n While residing under normobaric hypoxia (\u226514\u00a0h\/d; inspired oxygen fraction [FiO\n 2<\/jats:sub>\n ] 14.5%\u201314.2%) for 14\u00a0days, elite field hockey players performed, in addition to their regular field hockey practice in normoxia, 6 sessions (4\u2009\u00d7\u20095\u2009\u00d7\u20095-s maximal sprints; 25-s passive recovery; 5-min rest) under either normobaric hypoxia (LHTLH; FiO\n 2<\/jats:sub>\n \u223c14.5%, n\u2009=\u200911) or normoxia (live high\u2013train low; FiO\n 2<\/jats:sub>\n 20.9%, n\u2009=\u200912). A control group (live low\u2013train low; FiO\n 2<\/jats:sub>\n \u223c20.9%, n\u2009=\u20099) residing in normoxia without additional repeated-sprint training was included. Before (Pre)\u00a0and a few days (Post-1) and 3\u00a0weeks (Post-2) after the intervention, stride mechanics were assessed during an overground repeated-sprint test (8\u2009\u00d7\u200920\u00a0m, 20-s recovery). Two-way repeated-measures analysis of variance (time [Pre, Post-1, and Post-2]\u2009\u00d7\u2009condition [LHTLH, live high\u2013train low, and live low\u2013train low]) were conducted.\n \n Results<\/jats:bold>\n :\n <\/jats:italic>\n Peak sprinting speed increased in LHTLH from Pre to Post-1 (+2.2% [2.0%];\n P<\/jats:italic>\n \u2009=\u2009.002) and Post-2 (+2.0% [2.4%];\n P<\/jats:italic>\n \u2009=\u2009.025), with no significant changes in live high\u2013train low and live low\u2013train low. There was no main effect of time (all\n P<\/jats:italic>\n \u2009\u2265\u2009.062), condition (all\n P<\/jats:italic>\n \u2009\u2265\u2009.771), or a significant time\u2009\u00d7\u2009condition interaction (all\n P<\/jats:italic>\n \u2009\u2265\u2009.230) for any stride temporal variable (contact time, flight time, stride frequency, and stride length) or spring-mass model characteristics (vertical and leg stiffness).\n \n Conclusions<\/jats:bold>\n :\n <\/jats:italic>\n Peak sprinting speed improved in elite field hockey players following LHTLH altitude training, while stride mechanical adjustments to repeated overground sprints remained unchanged for at least 3\u00a0weeks postintervention.\n <\/jats:p>","DOI":"10.1123\/ijspp.2024-0028","type":"journal-article","created":{"date-parts":[[2024,7,24]],"date-time":"2024-07-24T15:35:21Z","timestamp":1721835321000},"page":"958-962","source":"Crossref","is-referenced-by-count":0,"title":["Does \u201cLive High\u2013Train Low and High\u201d Hypoxic Training Alter Stride Mechanical Pattern During Repeated Sprints in Elite Team-Sport Players?"],"prefix":"10.1123","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4797-182X","authenticated-orcid":true,"given":"Olivier","family":"Girard","sequence":"first","affiliation":[{"name":"School of Human Sciences (Exercise and Sport Science), University of Western Australia, Crawley, WA, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8081-4423","authenticated-orcid":true,"given":"Gr\u00e9goire P.","family":"Millet","sequence":"additional","affiliation":[{"name":"ISSUL, Institute of Sports Sciences, University of Lausanne, Lausanne, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0808-7986","authenticated-orcid":true,"given":"Franck","family":"Brocherie","sequence":"additional","affiliation":[{"name":"Laboratory Sport, Expertise and Performance (EA 7370), Research Department, French Institute of Sport (INSEP), Paris, France"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"100","reference":[{"issue":"4","key":"r1","series-title":"Eur J Appl Physiol","doi-asserted-by":"publisher","first-page":"1049","DOI":"10.1007\/s00421-020-04589-x","article-title":"Hypoxic re-exposure retains hematological but not performance adaptations post-altitude training","volume":"121","author":"Yan B","year":"2021","unstructured":"Yan B, Ge X, Yu J, Hu Y, Girard O. Hypoxic re-exposure retains hematological but not performance adaptations post-altitude training. Eur J Appl Physiol. 2021;121(4):1049\u20131059. PubMed ID: 33426576 doi:10.1007\/s00421-020-04589-x"},{"issue":"7","key":"r2","series-title":"J Appl Physiol","doi-asserted-by":"publisher","first-page":"837","DOI":"10.1152\/japplphysiol.00663.2013","article-title":"Timing of return from altitude training for optimal sea level performance","volume":"116","author":"Chapman RF","year":"2014","unstructured":"Chapman RF, Laymon Stickford AS, Lundby C, Levine BD. Timing of return from altitude training for optimal sea level performance. J Appl Physiol. 2014;116(7):837\u2013843. 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