{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T04:07:30Z","timestamp":1750219650969,"version":"3.41.0"},"reference-count":13,"publisher":"Human Kinetics","issue":"7","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2025,7,1]]},"abstract":"Purpose<\/jats:bold>:<\/jats:italic> To examine the effect of repeated-sprint training in hypoxia (RSH) on oxygenation kinetics in the vastus lateralis muscle using statistical parametric mapping during repeated treadmill sprints in world-class female Rugby Sevens players. Methods:<\/jats:bold><\/jats:italic> All players performed 4 repeated-sprint cycle-training sessions in either normobaric hypoxia (RSH, exercise, and interset rest at inspired oxygen fraction of 10.6% and 20.9%, respectively; n\u2009=\u200912) or normoxia (n\u2009=\u200911) during a 9-day training camp before international competition. Repeated-sprint ability (8\u2009\u00d7\u20095-s treadmill sprints with 25-s recovery) was assessed preintervention and postintervention in normoxia only. Continuous assessment of tissue saturation index (TSI) in the vastus lateralis muscle was conducted using near-infrared spectroscopy. Results<\/jats:bold>:<\/jats:italic> There was a difference in TSI signal amplitude between conditions during the last second of the 5-second sprint phase and the first 3.7\u00a0seconds of the 25-second recovery phase. In the RSH group, TSI magnitude during the sprints and recovery phases was lower after compared with before the intervention (from 4.3 to 8.7\u00a0s; P<\/jats:italic>\u2009<\u2009.001). The cumulated distance covered in sprints 1 to 8 significantly increased from preintervention to postintervention (pooled values: +1.9% [3.0]%; P<\/jats:italic>\u2009=\u2009.019), regardless of the condition (P<\/jats:italic>\u2009=\u2009.149). Conclusion:<\/jats:bold><\/jats:italic> Statistical parametric mapping analysis revealed a noticeable change in TSI in the RSH group toward the end of both the active and the early recovery phase of a normoxic repeated-treadmill-sprints test, whereas no differences were detected in the normoxic group postintervention. Despite improvements in repeated-sprint ability in both groups, addition of severe hypoxia during repeated-sprint training did not yield further performance enhancement.<\/jats:p>","DOI":"10.1123\/ijspp.2024-0487","type":"journal-article","created":{"date-parts":[[2025,5,30]],"date-time":"2025-05-30T17:32:27Z","timestamp":1748626347000},"page":"1013-1016","source":"Crossref","is-referenced-by-count":0,"title":["Statistical Parametric Mapping Analysis of Muscle-Oxygenation Kinetics in Response to Repeated-Sprint Training in Hypoxia"],"prefix":"10.1123","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4813-3868","authenticated-orcid":true,"given":"Clint","family":"Hansen","sequence":"first","affiliation":[{"name":"Department of Neurology, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany"}],"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 of Sport, Expertise, and Performance (EA 7370), French Institute of Sport (INSEP), Paris, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0348-4744","authenticated-orcid":true,"given":"S\u00e9bastien","family":"Racinais","sequence":"additional","affiliation":[{"name":"Environmental Stress Unit, CREPS Montpellier-Font Romeu, Montpellier, France"},{"name":"DMEM, University of Montpellier, INRAE, Montpellier, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2328-4638","authenticated-orcid":true,"given":"Nathan","family":"Townsend","sequence":"additional","affiliation":[{"name":"College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4669-6595","authenticated-orcid":true,"given":"Scott","family":"Cocking","sequence":"additional","affiliation":[{"name":"Department of Sport Science, Aspire Academy for Sports Excellence, Doha, Qatar"},{"name":"Chelsea Fooball Club, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9422-8211","authenticated-orcid":true,"given":"Anthony","family":"Couderc","sequence":"additional","affiliation":[{"name":"Laboratoire Jeunesse\u2013Activit\u00e9 Physique et Sportive\u2013Sant\u00e9 (J-AP2S), Toulon University, Toulon, France"},{"name":"RC Toulon SASP, Toulon, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Julien","family":"Piscione","sequence":"additional","affiliation":[{"name":"Department of Research, French Rugby Union Federation (FFR), Marcoussis, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4797-182X","authenticated-orcid":true,"given":"Olivier","family":"Girard","sequence":"additional","affiliation":[{"name":"School of Human Science (Exercise and Sport Sciences), University of Western Australia, Perth, WA, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"100","reference":[{"issue":"8","key":"r1","series-title":"Sports Med","doi-asserted-by":"publisher","first-page":"1651","DOI":"10.1007\/s40279-017-0685-3","article-title":"Effects of repeated-sprint training in hypoxia on sea-level performance: a meta-analysis","volume":"47","author":"Brocherie F","year":"2017","unstructured":"Brocherie F, Girard O, Faiss R, Millet GP. 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