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dc.contributor.authorDiamond, Laura E
dc.contributor.authorWrigley, Tim V
dc.contributor.authorHinman, Rana S
dc.contributor.authorHodges, Paul W
dc.contributor.authorO'Donnell, John
dc.contributor.authorTakla, Amir
dc.contributor.authorBennell, Kim L
dc.date.accessioned2018-08-29T04:32:12Z
dc.date.available2018-08-29T04:32:12Z
dc.date.issued2016
dc.identifier.issn1440-2440
dc.identifier.doi10.1016/j.jsams.2015.10.002
dc.identifier.urihttp://hdl.handle.net/10072/172383
dc.description.abstractObjectives: This study investigated isometric and isokinetic hip strength in individuals with and without symptomatic femoroacetabular impingement (FAI). The specific aims were to: (i) determine whether differences exist in isometric and isokinetic hip strength measures between groups; (ii) compare hip strength agonist/antagonist ratios between groups; and (iii) examine relationships between hip strength and self-reported measures of either hip pain or function in those with FAI. Design: Cross-sectional. Methods: Fifteen individuals (11 males; 25 ± 5 years) with symptomatic FAI (clinical examination and imaging (alpha angle >55◦ (cam FAI), and lateral centre edge angle >39◦ and/or positive crossover sign (combined FAI))) and 14 age- and sex-matched disease-free controls (no morphological FAI on magnetic resonance imaging) underwent strength testing. Maximal voluntary isometric contraction strength of hip muscle groups and isokinetic hip internal (IR) and external rotation (ER) strength (20◦/s) were measured. Groups were compared with independent t-tests and Mann–Whitney U tests. Results: Participants with FAI had 20% lower isometric abduction strength than controls (p = 0.04). There were no significant differences in isometric strength for other muscle groups or peak isokinetic ER or IR strength. The ratio of isometric, but not isokinetic, ER/IR strength was significantly higher in the FAI group (p = 0.01). There were no differences in ratios for other muscle groups. Angle of peak IR torque was the only feature correlated with symptoms. Conclusions: Individuals with symptomatic FAI demonstrate isometric hip abductor muscle weakness and strength imbalance in the hip rotators. Strength measurement, including agonist/antagonist ratios, may be relevant for clinical management of FAI.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofpagefrom696
dc.relation.ispartofpageto701
dc.relation.ispartofissue9
dc.relation.ispartofjournalJournal of Science and Medicine in Sport
dc.relation.ispartofvolume19
dc.subject.fieldofresearchHuman Movement and Sports Science not elsewhere classified
dc.subject.fieldofresearchHuman Movement and Sports Sciences
dc.subject.fieldofresearchMedical Physiology
dc.subject.fieldofresearchPublic Health and Health Services
dc.subject.fieldofresearchcode110699
dc.subject.fieldofresearchcode1106
dc.subject.fieldofresearchcode1116
dc.subject.fieldofresearchcode1117
dc.titleIsometric and isokinetic hip strength and agonist/antagonist ratios in symptomatic femoroacetabular impingement
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorDiamond, Laura


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