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However, the reliability of this test under dual-task conditions has not been investigated in fibromyalgia. Methods: A total of 10 women with fibromyalgia participated in this study. Participants completed the concentric\/concentric test. The dual-task condition involved subtracting two by two while performing the test. Results: Reliability analysis under the single condition showed \u201cpoor\u201d to \u201cexcellent\u201d values for maximum peak torque in knee extension and \u201cmoderate\u201d to \u201cexcellent\u201d values for average. \u201cPoor\u201d to \u201cexcellent\u201d reliability values were found in knee flexion for the maximum and average. Dual-task condition in knee extension ranged from \u201cmoderate\u201d to \u201cexcellent\u201d for maximum and average values, and in knee flexion, it ranged from \u201cpoor\u201d to \u201cexcellent\u201d for maximum value and from \u201cmoderate\u201d to \u201cexcellent\u201d for average value. Conclusions: Isokinetic dynamometry demonstrated sufficient reliability for measuring strength in knee extension maximum and average during single-task and dual-task conditions, along with knee flexion dual-task average in fibromyalgia. For knee flexion single-task maximum and average and knee flexion dual-task maximum, we did not obtain sufficiently reliable measurements. Only the concentric\/concentric test has been studied, and future studies with a larger sample size are needed in order to generalize the results.<\/jats:p>","DOI":"10.3390\/jcm13051288","type":"journal-article","created":{"date-parts":[[2024,2,26]],"date-time":"2024-02-26T03:34:04Z","timestamp":1708918444000},"page":"1288","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Test\u2013Retest Reliability of Isokinetic Strength in Lower Limbs under Single and Dual Task Conditions in Women with Fibromyalgia"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7366-5738","authenticated-orcid":false,"given":"Mari Carmen","family":"Gomez-Alvaro","sequence":"first","affiliation":[{"name":"Physical Activity and Quality of Life Research Group (AFYCAV), Faculty of Sport Sciences, University of Extremadura, 10003 C\u00e1ceres, Spain"},{"name":"Institute for Research and Innovation in Sport Sciences, University of Extremadura, 10003 C\u00e1ceres, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0757-5937","authenticated-orcid":false,"given":"Juan Luis","family":"Leon-Llamas","sequence":"additional","affiliation":[{"name":"Physical Activity and Quality of Life Research Group (AFYCAV), Faculty of Sport Sciences, University of Extremadura, 10003 C\u00e1ceres, Spain"},{"name":"Institute for Research and Innovation in Sport Sciences, University of Extremadura, 10003 C\u00e1ceres, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1434-6750","authenticated-orcid":false,"given":"Maria","family":"Melo-Alonso","sequence":"additional","affiliation":[{"name":"Physical Activity and Quality of Life Research Group (AFYCAV), Faculty of Sport Sciences, University of Extremadura, 10003 C\u00e1ceres, Spain"},{"name":"Institute for Research and Innovation in Sport Sciences, University of Extremadura, 10003 C\u00e1ceres, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0784-1753","authenticated-orcid":false,"given":"Santos","family":"Villafaina","sequence":"additional","affiliation":[{"name":"Physical Activity and Quality of Life Research Group (AFYCAV), Faculty of Sport Sciences, University of Extremadura, 10003 C\u00e1ceres, Spain"},{"name":"Institute for Research and Innovation in Sport Sciences, University of Extremadura, 10003 C\u00e1ceres, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5388-2009","authenticated-orcid":false,"given":"Francisco Javier","family":"Dom\u00ednguez-Mu\u00f1oz","sequence":"additional","affiliation":[{"name":"Physical Activity and Quality of Life Research Group (AFYCAV), Faculty of Sport Sciences, University of Extremadura, 10003 C\u00e1ceres, Spain"},{"name":"Institute for Research and Innovation in Sport Sciences, University of Extremadura, 10003 C\u00e1ceres, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1001-8883","authenticated-orcid":false,"given":"Narcis","family":"Gusi","sequence":"additional","affiliation":[{"name":"Physical Activity and Quality of Life Research Group (AFYCAV), Faculty of Sport Sciences, University of Extremadura, 10003 C\u00e1ceres, Spain"},{"name":"Institute for Research and Innovation in Sport Sciences, University of Extremadura, 10003 C\u00e1ceres, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,2,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"356","DOI":"10.1016\/j.rbr.2016.10.004","article-title":"Prevalence of fibromyalgia: Literature review update","volume":"57","author":"Marques","year":"2017","journal-title":"Rev. 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