{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,11]],"date-time":"2026-11-11T06:02:13Z","timestamp":1794376933204,"version":"4.9.0"},"reference-count":45,"publisher":"National Athletic Trainers' Association","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2009,11]]},"abstract":"<jats:title>Abstract<\/jats:title>\n        <jats:sec>\n          <jats:title>Objective:<\/jats:title>\n          <jats:p>To determine whether concentric evertor muscle weakness was associated with functional ankle instability (FAI).<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Data Sources:<\/jats:title>\n          <jats:p>We conducted an electronic search through November 2007, limited to English, and using PubMed, Pre-CINAHL, CINAHL, and SPORTDiscus. A forward search was conducted using the Science Citation Index on studies from the electronic search. Finally, we conducted a hand search of all selected studies and contacted the respective authors to identify additional studies. We included peer-reviewed manuscripts, dissertations, and theses.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Study Selection:<\/jats:title>\n          <jats:p>We evaluated the titles and abstracts of studies identified by the electronic searches. Studies were selected by consensus and reviewed only if they included participants with FAI or chronic ankle instability and strength outcomes. Studies were included in the analysis if means and SDs (or other relevant statistical information, such as <jats:italic>P<\/jats:italic> values or <jats:italic>t<\/jats:italic> values and group n's) were reported for FAI and stable groups (or ankles).<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Data Extraction:<\/jats:title>\n          <jats:p>Data were extracted by the authors independently, cross-checked for accuracy, and limited to outcomes of concentric eversion strength. We rated each study for quality. Outcomes were coded as either fast or slow velocity (ie, equal to or greater than 110\u00b0\/s or less than 110\u00b0\/s, respectively).<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Data Synthesis:<\/jats:title>\n          <jats:p>Data included the means, SDs, and group sample sizes (or other appropriate statistical information) for the FAI and uninjured groups (or ankles). The standard difference in the means (SDM) for each outcome was calculated using the pooled SD. We tested individual and overall SDMs using the Z statistic and comparisons between fast and slow velocities using the Q statistic. Our analysis revealed that ankles with FAI were weaker than stable ankles (SDM \u200a=\u200a 0.224, Z \u200a=\u200a 4.0, <jats:italic>P<\/jats:italic> &lt; .001, 95% confidence interval \u200a=\u200a 0.115, 0.333). We found no difference between the fast- and slow-velocity SDMs (SDM<jats:sub>Fast<\/jats:sub> \u200a=\u200a 0.189, SDM<jats:sub>Slow<\/jats:sub> \u200a=\u200a 0.244, Q \u200a=\u200a 29.9, <jats:italic>df<\/jats:italic> \u200a=\u200a 24, <jats:italic>P<\/jats:italic> \u200a=\u200a .187). Because of the small SDM, this method of measuring ankle strength in the clinical setting may need to be reevaluated.<\/jats:p>\n        <\/jats:sec>","DOI":"10.4085\/1062-6050-44.6.653","type":"journal-article","created":{"date-parts":[[2009,12,30]],"date-time":"2009-12-30T15:36:39Z","timestamp":1262187399000},"page":"653-662","source":"Crossref","is-referenced-by-count":130,"title":["Concentric Evertor Strength Differences and Functional Ankle Instability: A Meta-Analysis"],"prefix":"10.4085","volume":"44","author":[{"given":"Brent L.","family":"Arnold","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shelley W.","family":"Linens","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sarah J.","family":"de la Motte","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Scott E.","family":"Ross","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2557","reference":[{"issue":"2","key":"i1062-6050-44-6-653-Hootman1","series-title":"J Athl Train","first-page":"311","article-title":"Epidemiology of collegiate injuries for 15 sports: summary and recommendations for injury prevention initiatives.","volume":"42","author":"Hootman, J. 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G.BorgesJr. Lateral ankle sprain: isokinetic test reliability and comparison between invertors and evertors.Clin Biomech (Bristol, Avon)2004. 198:868\u2013871."},{"issue":"5","key":"i1062-6050-44-6-653-Aydog1","series-title":"Knee Surg Sports Traumatol Arthrosc","first-page":"478","article-title":"Reliability of isokinetic ankle inversion- and eversion-strength measurement in neutral foot position, using the Biodex dynamometer.","volume":"12","author":"Aydog, E.","year":"2004","unstructured":"Aydog, E., S. T.Aydog, A.Cakci, and M. N.Doral. Reliability of isokinetic ankle inversion- and eversion-strength measurement in neutral foot position, using the Biodex dynamometer.Knee Surg Sports Traumatol Arthrosc2004. 125:478\u2013481."},{"issue":"1","key":"i1062-6050-44-6-653-Klein1","series-title":"J Biomech","first-page":"21","article-title":"Moment arm length variations of selected muscles acting on talocrural and subtalar joints during movement: an in vitro study.","volume":"29","author":"Klein, P.","year":"1996","unstructured":"Klein, P., S.Mattys, and M.Rooze. Moment arm length variations of selected muscles acting on talocrural and subtalar joints during movement: an in vitro study.J Biomech1996. 291:21\u201330."}],"container-title":["Journal of Athletic Training"],"original-title":[],"link":[{"URL":"https:\/\/nata.kglmeridian.com\/view\/journals\/attr\/44\/6\/article-p653.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/meridian.allenpress.com\/jat\/article-pdf\/44\/6\/653\/1455321\/1062-6050-44_6_653.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/nata.kglmeridian.com\/downloadpdf\/journals\/attr\/44\/6\/article-p653.xml","content-type":"text\/html","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/nata.kglmeridian.com\/downloadpdf\/journals\/attr\/44\/6\/article-p653.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,12]],"date-time":"2025-06-12T00:37:38Z","timestamp":1749688658000},"score":1,"resource":{"primary":{"URL":"https:\/\/nata.kglmeridian.com\/view\/journals\/attr\/44\/6\/article-p653.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2009,11]]},"references-count":45,"journal-issue":{"issue":"6"},"URL":"https:\/\/doi.org\/10.4085\/1062-6050-44.6.653","relation":{},"ISSN":["1062-6050"],"issn-type":[{"value":"1062-6050","type":"print"}],"subject":[],"published":{"date-parts":[[2009,11]]}}}