Validity and inter-day reliability of a free-oscillation test to measure knee extensor and knee flexor musculo-articular stiffness

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dc.contributor.author Ditroilo, Massimiliano en_US
dc.contributor.author Watsford, Mark en_US
dc.contributor.author Devito, Guiseppe en_US
dc.contributor.editor en_US
dc.date.accessioned 2012-10-12T03:34:26Z
dc.date.available 2012-10-12T03:34:26Z
dc.date.issued 2011 en_US
dc.identifier 2011000842 en_US
dc.identifier.citation Ditroilo Massimiliano, Watsford Mark, and Devito Guiseppe 2011, 'Validity and inter-day reliability of a free-oscillation test to measure knee extensor and knee flexor musculo-articular stiffness', Elsevier, vol. 21, no. 3, pp. 492-498. en_US
dc.identifier.issn 1050-6411 en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/18626
dc.description.abstract The purpose of this study was to assess the validity and inter-day reliability of musculo-articular stiffness (MAS) in the knee-extensor (KE) and knee-flexor (KF) muscle groups, measured with a free-oscillation technique. Fourteen participants were measured, on two occasions, for KE and KF maximal isometric voluntary contraction, rate of torque development (RTD) and electromechanical delay (EMD), along with MAS using multiple sub-maximal loads relative to the individual?s maximal voluntary contraction (MAS%MVC). Furthermore, 18 participants were tested for MAS using one fixed assessment load for each muscle group (MASFL) during a separate series of tests on three occasions. MAS%MVC was significantly increased as load increased both in KE and in KF (p < 0.01) fitting a curvilinear relationship as depicted in similar studies. Validity was demonstrated relating MAS%MVC to RTD (r = 0.51?0.71, p < 0.05) and to EMD (r = 0.56 to 0.67, p < 0.05). While MAS%MVC reliability (ICC = 0.62?0.89; CV = 8.1?13.1%) was questionable to acceptable, MASFL exhibited good to excellent reliability (ICC = 0.81?0.94; CV = 3.7? 6.5%). No significant systematic bias was detected for any of the variables considered. The assessment of KE and KF MAS using the free-oscillation technique appears to be valid and reliable, with the use of MASFL yielding higher reliability than the use of MASMVC. en_US
dc.language en_US
dc.publisher Elsevier en_US
dc.relation.isbasedon en_US
dc.relation.isbasedon http://dx.doi.org/10.1016/j.jelekin.2010.11.004 en_US
dc.title Validity and inter-day reliability of a free-oscillation test to measure knee extensor and knee flexor musculo-articular stiffness en_US
dc.parent Journal of Electromyography & Kinesiology en_US
dc.journal.volume 21 en_US
dc.journal.number 3 en_US
dc.publocation USA en_US
dc.identifier.startpage 492 en_US
dc.identifier.endpage 498 en_US
dc.cauo.name BUS.School of Leisure, Sport and Tourism en_US
dc.conference Verified OK en_US
dc.for 110600 en_US
dc.personcode 0000073129 en_US
dc.personcode 990028 en_US
dc.personcode 0000073126 en_US
dc.percentage 100 en_US
dc.classification.name Human Movement and Sports Science en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords Free-oscillation test Musculo-articular stiffness Rate of torque development Electromechanical delay en_US


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