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Low-level laser therapy improves the VO2 kinetics in competitive cyclists

2017Journal article Restricted access
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dc.contributor.authorLanferdini, Fábio J.
dc.contributor.authorKrüger, Renata L.
dc.contributor.authorBaroni, Bruno M.
dc.contributor.authorLazzari, Caetano
dc.contributor.authorFigueiredo, Pedro
dc.contributor.authorReischak-Oliveira, Alvaro
dc.contributor.authorVaz, Marco A.
dc.date.accessioned2021-04-29T14:16:16Z
dc.date.available2021-04-29T14:16:16Z
dc.date.issued2017
dc.description.abstractSome evidence supports that low-level laser therapy (LLLT) reduces neuromuscular fatigue, so incrementing sports performance. A previous randomized controlled trial of our group showed increased exercise tolerance in male competitive cyclists treated with three different LLLT doses (3, 6, and 9 J/diode; or 135, 270, and 405 J/thigh) before time-to-exhaustion cycling tests. Now, the present study was designed to evaluate the effects of these LLLT doses on the VO2 kinetics of athletes during cycling tests. Twenty male competitive cyclists (29 years) participated in a crossover, randomized, double-blind, and placebo-controlled trial. On the first day, the participants performed an incremental cycling test to exhaustion to determine maximal oxygen uptake (VO2MAX) and maximal power output (POMAX), as well as a familiarization with the time-to-exhaustion test. In the following days (2 to 5), all participants performed time-to-exhaustion tests at POMAX. Before the exhaustion test, different doses of LLLT (3, 6, and 9 J/diode; or 135, 270, and 405 J/thigh, respectively) or placebo were applied bilaterally to the quadriceps muscle. All exhaustion tests were monitored online by an open-circuit spirometry system in order to analyze the VO2 amplitude, VO2 delay time, time constant (tau), and O2 deficit. Tau and O2 deficit were decreased with LLLT applications compared to the placebo condition (p < 0.05). No differences (p > 0.05) were found between the experimental conditions for VO2 amplitude and VO2 delay time. In conclusion, LLLT decreases tau and O2 deficit during time-to-exhaustion tests in competitive cyclists, and these changes in VO2 kinetics response can be one of the possible mechanisms to explain the ergogenic effect induced by LLLT.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1007/s10103-017-2347-ypt_PT
dc.identifier.urihttp://hdl.handle.net/10400.24/1819
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectAdultpt_PT
dc.subjectCross-Over Studiespt_PT
dc.subjectDouble-Blind Methodpt_PT
dc.subjectExercisept_PT
dc.subjectExercise Testpt_PT
dc.subjectHumanspt_PT
dc.subjectKineticspt_PT
dc.subjectLow-Level Light Therapypt_PT
dc.subjectMalept_PT
dc.subjectBicyclingpt_PT
dc.subjectOxygen Consumptionpt_PT
dc.titleLow-level laser therapy improves the VO2 kinetics in competitive cyclistspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage460pt_PT
oaire.citation.issue3pt_PT
oaire.citation.startPage453pt_PT
oaire.citation.titleLasers in Medical Sciencept_PT
oaire.citation.volume33pt_PT
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT

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