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dc.contributor.authorOliveira, Murilo X
dc.contributor.authorToma, Renata L
dc.contributor.authorJones, Brett JL
dc.contributor.authorCyprien, Thomas P
dc.contributor.authorTier, Matthew R
dc.contributor.authorWallace, Cameron A
dc.contributor.authorRenno, Ana CM
dc.contributor.authorSabapathy, Surendran
dc.contributor.authorLaakso, E-Liisa
dc.contributor.editorHamblin, MR
dc.contributor.editorCarroll, JD
dc.contributor.editorArany, P
dc.date.accessioned2017-07-27T01:30:19Z
dc.date.available2017-07-27T01:30:19Z
dc.date.issued2017
dc.identifier.isbn978-1-5106-0538-1
dc.identifier.issn0277-786X
dc.identifier.doi10.1117/12.2253585
dc.identifier.urihttp://hdl.handle.net/10072/342506
dc.description.abstractPhotobiomodulation therapy (PBMt) has been used to increase muscle performance and improve recovery when applied before exercise. We aimed to evaluate the effects of PBMt using LASER on muscle oxygenation and performance. The study was a randomized, participant and assessor-blinded, within-subject crossover trial with placebo control to test the viability of the methods. Five physically active young women were randomly assigned to either placebo, or active PBMt (12 diode cluster probe; 904 nm; 60 mW; 250 Hz; 43.2 J per site, 129.6 J total) in contact over rectus femoris (RF) muscle of the dominant limb immediately before an isokinetic fatigue protocol. A one-week wash-out period preceded cross-over. Electromyography and isokinetic performance measures were evaluated. Absolute concentrations of deoxygenated haemoglobin and myoglobin (deoxy[Hb + Mb]) of the RF, an index of local microvascular fractional O2 extraction, was monitored continuously by near-infrared spectroscopy (NIRS). Total haemoglobin concentration as an indicator of microvascular haematocrit was calculated as the sum of the deoxy[Hb + Mb] and oxy[Hb + Mb] signals. PBMt pre-conditioning reduced time to peak torque when compared to placebo (P<0.05). PBMt resulted in a noticeably reduced trend in deoxy[Hb + Mb] during exercise compared to placebo (P>0.05). PBMt before exercise improves indicators of muscle performance, potentially by increasing local matching of bulk and microvascular O2 delivery relative to skeletal muscle O2 utilisation. Further work is required to understand the effect of PBMt on haemodynamic and metabolic characteristics of muscle. © (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherSociety of Photo-Optical Instrumentation Engineers (SPIE)
dc.publisher.placeUnited States
dc.relation.ispartofconferencenameConference on Mechanisms of Photobiomodulation Therapy XII
dc.relation.ispartofconferencetitleMECHANISMS OF PHOTOBIOMODULATION THERAPY XII
dc.relation.ispartofdatefrom2017-01-28
dc.relation.ispartofdateto2017-01-29
dc.relation.ispartoflocationSan Francisco, CA
dc.relation.ispartofpagefrom9 pages
dc.relation.ispartofpageto9 pages
dc.relation.ispartofvolume10048
dc.subject.fieldofresearchPhysiotherapy
dc.subject.fieldofresearchcode110317
dc.titleEffects of photobiomodulation therapy (pulsed LASER 904 nm) on muscle oxygenation and performance in exercise-induced skeletal muscle fatigue in young women: a pilot study
dc.typeConference output
dc.type.descriptionE1 - Conferences
dc.type.codeE - Conference Publications
dc.description.versionVersion of Record (VoR)
gro.rights.copyright© 2017 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
gro.hasfulltextFull Text
gro.griffith.authorSabapathy, Surendran
gro.griffith.authorLaakso, Liisa
gro.griffith.authorTier, Matthew
gro.griffith.authorWallace, Cameron
gro.griffith.authorCyprien, Thomas
gro.griffith.authorJones, Brett


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