{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T11:21:07Z","timestamp":1791458467199,"version":"4.3.4"},"reference-count":31,"publisher":"Human Kinetics","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,5,1]]},"abstract":"<jats:p><jats:italic><jats:bold>Context<\/jats:bold>:<\/jats:italic> The hamstrings are the most commonly injured muscle in sports and are especially injury prone in lengthened positions. Measuring knee muscle strength in such positions could be relevant to establish injury risk. Handheld dynamometry has been shown to be a valid, reliable, and practical tool to measure isometric muscle strength clinically. The aim of this study was to assess the validity and reliability of the assessment of isometric knee muscle strength with a handheld dynamometer (HHD) at various muscle lengths, by modifying the hip and knee angles during testing. <jats:italic><jats:bold>Design<\/jats:bold>:<\/jats:italic> Concurrent validity and test\u2013retest reliability. <jats:italic><jats:bold>Methods<\/jats:bold>:<\/jats:italic> Thirty young healthy participants were recruited. Hamstring and quadriceps isometric strength was measured with a HHD and with an isokinetic dynamometer, over 2 testing sessions, in a randomized order. Isometric strength was measured on the right lower limb in 6 different positions, with the hip at either 0\u00b0 or 80\u00b0 of flexion and the knee at either 30\u00b0, 60\u00b0, or 90\u00b0 of flexion. Pearson and Spearman correlations were used to assess the validity, and intraclass correlation coefficients were calculated to establish the test\u2013retest reliability of the HHD. <jats:italic><jats:bold>Results<\/jats:bold>:<\/jats:italic> Good to excellent reliability and moderate to high validity were found in all the tested muscle length positions, except for the hamstrings in a seated position with the knee extended at 30\u00b0. <jats:italic><jats:bold>Conclusions<\/jats:bold>:<\/jats:italic> The use of a HHD is supported in the clinical setting to measure knee muscle strength at varying muscle lengths in healthy adults, but not for the hamstrings in a lengthened position (hip flexed and knee extended). These results will have to be confirmed in sport-specific populations.<\/jats:p>","DOI":"10.1123\/jsr.2023-0256","type":"journal-article","created":{"date-parts":[[2024,4,1]],"date-time":"2024-04-01T19:10:38Z","timestamp":1711998638000},"page":"267-274","source":"Crossref","is-referenced-by-count":10,"title":["Validity and Reliability of Handheld Dynamometry to Assess Isometric Hamstrings and Quadriceps Strength at Varying Muscle Lengths"],"prefix":"10.1123","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9767-4815","authenticated-orcid":true,"given":"Margaux","family":"Baron","sequence":"first","affiliation":[{"name":"School of Health Sciences (HESAV), HES-SO University of Applied Sciences and Arts Western Switzerland, Lausanne, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gilles","family":"Divernois","sequence":"additional","affiliation":[{"name":"School of Health Sciences (HESAV), HES-SO University of Applied Sciences and Arts Western Switzerland, Lausanne, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Beno\u00eet","family":"Grandjean","sequence":"additional","affiliation":[{"name":"School of Health Sciences (HESAV), HES-SO University of Applied Sciences and Arts Western Switzerland, Lausanne, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0917-9687","authenticated-orcid":true,"given":"Kenny","family":"Guex","sequence":"additional","affiliation":[{"name":"School of Health Sciences (HESAV), HES-SO University of Applied Sciences and Arts Western Switzerland, Lausanne, Switzerland"},{"name":"Swiss Athletics, Haus des Sports, Ittigen, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"100","reference":[{"issue":"7","key":"r1","series-title":"Br J Sports Med","doi-asserted-by":"publisher","first-page":"505","DOI":"10.1136\/bjsports-2012-091008","article-title":"Determination of future prevention strategies in elite track and field: analysis of Daegu 2011 IAAF Championships injuries and illnesses surveillance","volume":"46","author":"Alonso JM","year":"2012","unstructured":"Alonso JM, Edouard P, Fischetto G, Adams B, Depiesse F, Mountjoy M. 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