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dc.contributor.authorFulford, J
dc.contributor.authorLiepa, A
dc.contributor.authorBarker, AR
dc.contributor.authorMeakin, Judith R.
dc.date.accessioned2015-04-14T08:38:59Z
dc.date.accessioned2017-03-30T09:20:00Z
dc.date.issued2014-12-01
dc.description.abstractPhosphorous magnetic resonance spectroscopy (31P-MRS) and near-infra red spectroscopy (NIRS) provide methods for measuring spinal muscle function non-invasively but their reliability is not established. The aim of this study was assess the reliability (ICC) and error magnitude (CV%) of measurements of muscle phosphocreatine (PCr), tissue oxygenation index (TOI), and muscle deoxyhaemoglobin (HHb) acquired during fatigue and in recovery after 24 s exercise in the lumbar muscles. Ten healthy participants (19-25 years, 5 male, 5 female) performed exercise that involved holding the upper body unsupported in slight extension until fatigue and then, after 30 minutes of rest, for repeated bursts of 24 seconds. ICCs indicated good to excellent reliability of baseline measures (TOI:0.75) and of amplitude changes during fatigue (PCr:0.73, TOI:0.69, HHb:0.80), and recovery (HHb:0.96) and poor to fair reliability for time constants describing rates of change during fatigue (PCr:0.11) and recovery (PCr:0.31, HHb:0.47). CV% indicated varying relative measurement error across baseline measures (TOI:5%), amplitude changes during fatigue (PCr:7%, TOI:38%, HHb:31%) and recovery (HHb:31%), and in time constants for fatigue (PCr:39%) and recovery (PCr:20%, HHb:37%). The results suggested that reliability would be sufficient for future studies on spinal muscle function but that measurement error may be too large to evaluate individuals.en_GB
dc.description.sponsorshipNIHRen_GB
dc.description.sponsorshipEPSRCen_GB
dc.identifier.citationVol. 35, Issue 13, pp. 1078 - 1083en_GB
dc.identifier.doi10.1055/s-0034-1372639
dc.identifier.grantnumberEP/I001433/1en_GB
dc.identifier.urihttp://hdl.handle.net/10871/26855
dc.language.isoenen_GB
dc.publisherThieme Publishingen_GB
dc.relation.replaceshttp://hdl.handle.net/10871/16771
dc.relation.replaces10871/16771
dc.relation.urlhttp://www.ncbi.nlm.nih.gov/pubmed/24977950en_GB
dc.rights.embargoreasonPublisher's policyen_GB
dc.rights© Georg Thieme Verlag KG Stuttgart · New Yorken_GB
dc.subjectLumbar spine musclesen_GB
dc.subjectPhosphocreatineen_GB
dc.subjectTissue oxygenation indexen_GB
dc.subjectDeoxyhaemoglobinen_GB
dc.titleThe reliability of 31P-MRS and NIRS measurements of spinal muscle functionen_GB
dc.typeArticleen_GB
dc.identifier.issn0172-4622
dc.descriptionThis is the accepted, peer reviewed version of the article, which has been published in final form at doi: 10.1055/s-0034-1372639en_GB
dc.identifier.journalInternational Journal of Sports Medicineen_GB


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