{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,29]],"date-time":"2026-03-29T07:47:00Z","timestamp":1774770420198,"version":"3.50.1"},"reference-count":25,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2022,2,25]],"date-time":"2022-02-25T00:00:00Z","timestamp":1645747200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["UIDB\/04585\/2020"],"award-info":[{"award-number":["UIDB\/04585\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JFMK"],"abstract":"<jats:p>Isokinetic tests have been highly valuable to athletic analysis, but their cost and technical operation turn them inaccessible. The purpose of this study was to verify the correlation between unilateral countermovement jump variables and isokinetic data. Thirty-two male professional soccer players were subjected to the isokinetic testing of both knee extensors and flexors in concentric and eccentric muscle contractions. They also executed unilateral countermovement vertical jumps (UCMJ) to compare maximum height, ground reaction force, and impulse power with isokinetic peak torque. Data analysis was conducted through Pearson correlation and linear regression. A high correlation was found between dominant unilateral extensor concentric peak torque and the UCMJ maximum height of the dominant leg. The non-dominant leg jump showed a moderate correlation. No other variable showed statistical significance. Linear regression allowed the generation of two formulae to estimate the peak torque from UCMJ for dominant and non-dominant legs. Although few studies were found to compare our results, leading to more studies being needed, a better understanding of the unilateral countermovement jump may be used in the future as a substitute to the expensive and technically demanding isokinetic testing when it is unavailable, allowing the assessment of lower limb physical asymmetries in athletic or rehabilitation environments.<\/jats:p>","DOI":"10.3390\/jfmk7010025","type":"journal-article","created":{"date-parts":[[2022,2,27]],"date-time":"2022-02-27T20:47:17Z","timestamp":1645994837000},"page":"25","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Association between Concentric and Eccentric Isokinetic Torque and Unilateral Countermovement Jump Variables in Professional Soccer Players"],"prefix":"10.3390","volume":"7","author":[{"given":"Bruno Mazziotti Oliveira","family":"Alves","sequence":"first","affiliation":[{"name":"Masters and Doctoral Program in Physiotherapy, University City of Sao Paulo (Unicid), Sao Paulo 03071-000, Brazil"},{"name":"Department of Physical Therapy and Biomechanics, Arsenal Football Club, London N7-7AJ, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2500-5388","authenticated-orcid":false,"given":"Robson Dias","family":"Scoz","sequence":"additional","affiliation":[{"name":"Masters and Doctoral Program in Physiotherapy, University City of Sao Paulo (Unicid), Sao Paulo 03071-000, Brazil"}]},{"given":"Ricardo Lima","family":"Burigo","sequence":"additional","affiliation":[{"name":"Masters and Doctoral Program in Physiotherapy, University City of Sao Paulo (Unicid), Sao Paulo 03071-000, Brazil"}]},{"given":"Isabella Christina","family":"Ferreira","sequence":"additional","affiliation":[{"name":"Masters and Doctoral Program in Physiotherapy, University City of Sao Paulo (Unicid), Sao Paulo 03071-000, Brazil"}]},{"given":"Ana Paula Silveira","family":"Ramos","sequence":"additional","affiliation":[{"name":"Physiotherapy Department, University of South of Santa Catarina (Unisul), Sao Jose 88137-270, Brazil"}]},{"given":"Jose Joao Baltazar","family":"Mendes","sequence":"additional","affiliation":[{"name":"Laboratory of Physical and Functional Assessment (LAFF), Interdisciplinary Center of Investigation Egas Monis (CiiEM), Caparica, 2829-511 Setubal, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7536-9193","authenticated-orcid":false,"given":"Luciano Maia Alves","family":"Ferreira","sequence":"additional","affiliation":[{"name":"Laboratory of Physical and Functional Assessment (LAFF), Interdisciplinary Center of Investigation Egas Monis (CiiEM), Caparica, 2829-511 Setubal, Portugal"}]},{"given":"Cesar Ferreira","family":"Amorim","sequence":"additional","affiliation":[{"name":"Masters and Doctoral Program in Physiotherapy, University City of Sao Paulo (Unicid), Sao Paulo 03071-000, Brazil"},{"name":"Laboratory of Physical and Functional Assessment (LAFF), Interdisciplinary Center of Investigation Egas Monis (CiiEM), Caparica, 2829-511 Setubal, Portugal"},{"name":"Lab Corinthians R9, Sport Club Corinthians Paulista, Sao Paulo 03828-000, Brazil"},{"name":"Laboratoire de Recherche BioNR, Universit\u00e9 du Quebec, Saguenay, QC G7H-2B1, Canada"}]}],"member":"1968","published-online":{"date-parts":[[2022,2,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1519\/SSC.0000000000000054","article-title":"Strength and Conditioning for Soccer Players","volume":"36","author":"Turner","year":"2014","journal-title":"Strength Cond. 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