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dc.contributor.authorHamlin, Michael J.en
dc.contributor.authorOlsen, P. D.en
dc.contributor.authorMarshall, H. C.en
dc.contributor.authorLizamore, Catherineen
dc.contributor.authorElliot, Catherineen
dc.identifier.citationHamlin, M.J., Olsen. P.D., Marshall. H.C., Lizamore, C.A., & Elliot, C.A. (2017). Hypoxic repeat sprint training improves rugby player's repeated sprint but not endurance performance. Frontiers in Physiology, 8:24. doi:10.3389/fphys.2017.00024en
dc.description.abstractThis study aims to investigate the performance changes in 19 well-trained male rugby players after repeat-sprint training (six sessions of four sets of 5 × 5 s sprints with 25 s and 5 min of active recovery between reps and sets, respectively) in either normobaric hypoxia (HYP; n = 9; F₁O₂ = 14.5%) or normobaric normoxia (NORM; n = 10; F₁O₂ = 20.9%). Three weeks after the intervention, 2 additional repeat-sprint training sessions in hypoxia (F₁O₂ = 14.5%) was investigated in both groups to gauge the efficacy of using "top-up" sessions for previously hypoxic-trained subjects and whether a small hypoxic dose would be beneficial for the previously normoxic-trained group. Repeated sprint (8 × 20 m) and Yo-Yo Intermittent Recovery Level 1 (YYIR1) performances were tested twice at baseline (Pre 1 and Pre 2) and weekly after (Post 1-3) the initial intervention (intervention 1) and again weekly after the second "top-up" intervention (Post 4-5). After each training set, heart rate, oxygen saturation, and rate of perceived exertion were recorded. Compared to baseline (mean of Pre 1 and Pre 2), both the hypoxic and normoxic groups similarly lowered fatigue over the 8 sprints 1 week after the intervention (Post 1: -1.8 ± 1.6%, -1.5 ± 1.4%, mean change ± 90% CI in HYP and NORM groups, respectively). However, from Post 2 onwards, only the hypoxic group maintained the performance improvement compared to baseline (Post 2: -2.1 ± 1.8%, Post 3: -2.3 ± 1.7%, Post 4: -1.9 ± 1.8%, and Post 5: -1.2 ± 1.7%). Compared to the normoxic group, the hypoxic group was likely to have substantially less fatigue at Post 3-5 (-2.0 ± 2.4%, -2.2 ± 2.4%, -1.6 ± 2.4% Post 3, Post 4, Post 5, respectively). YYIR1 performances improved throughout the recovery period in both groups (13-37% compared to baseline) with unclear differences found between groups. The addition of two sessions of "top-up" training after intervention 1, had little effect on either group. Repeat-sprint training in hypoxia for six sessions increases repeat sprint ability but not YYIR1 performance in well-trained rugby players.en
dc.publisherFrontiers Mediaen
dc.relationThe original publication is available from - Frontiers Media -
dc.rights© 2017 Hamlin, Olsen, Marshall, Lizamore and Elliot. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.en
dc.subjectnormobaric hypoxiaen
dc.subjectYo-Yo intermittent recovery testen
dc.subjectteam sportsen
dc.subjectrepeated sprint abilityen
dc.subjectintermittent hypoxic trainingen
dc.titleHypoxic repeat sprint training improves rugby player's repeated sprint but not endurance performanceen
dc.typeJournal Article
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Environment, Society and Designen
lu.contributor.unitDepartment of Tourism, Sport and Societyen
dc.subject.anzsrc1106 Human Movement and Sports Sciencesen
dc.subject.anzsrc11 Medical and Health Sciencesen
dc.subject.anzsrc0606 Physiologyen
dc.subject.anzsrc060604 Comparative Physiologyen
dc.subject.anzsrc110602 Exercise Physiologyen
dc.subject.anzsrc1116 Medical Physiologyen
dc.subject.anzsrc1701 Psychologyen
dc.relation.isPartOfFrontiers in Physiologyen
pubs.notesArticle 24en
pubs.organisational-group/LU/Faculty of Environment, Society and Design
pubs.organisational-group/LU/Faculty of Environment, Society and Design/DTSS
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/PE20
pubs.organisational-group/LU/Research Management Office/QE18

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