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, M
dc.contributor.author Watsford, ML
dc.contributor.author DeVito, G
dc.date.accessioned 2012-10-12T03:34:26Z
dc.date.issued 2011-01
dc.identifier.citation Journal of Electromyography & Kinesiology, 2011, 21 (3), pp. 492 - 498
dc.identifier.issn 1050-6411
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 individuals 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 = 0.510.71, p < 0.05) and to EMD (r = 0.56 to 0.67, p < 0.05). While MAS%MVC reliability (ICC = 0.620.89; CV = 8.113.1%) was questionable to acceptable, MASFL exhibited good to excellent reliability (ICC = 0.810.94; 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.
dc.publisher Elsevier
dc.relation.isbasedon 10.1016/j.jelekin.2010.11.004
dc.subject Free-oscillation test Musculo-articular stiffness Rate of torque development Electromechanical delay, Sport Sciences
dc.subject Free-oscillation test Musculo-articular stiffness Rate of torque development Electromechanical delay; Sport Sciences
dc.title Validity and inter-day reliability of a free-oscillation test to measure knee extensor and knee flexor musculo-articular stiffness
dc.type Journal Article
dc.parent Journal of Electromyography & Kinesiology
dc.journal.volume 3
dc.journal.volume 21
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 1106 Human Movement and Sports Science
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
dc.description.keywords Free-oscillation test Musculo-articular stiffness Rate of torque development Electromechanical delay
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Health
pubs.organisational-group /University of Technology Sydney/Strength - Cosmopolitan Civil Societies
pubs.organisational-group /University of Technology Sydney/Strength - Health Services and Practice Research


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