{"id":2430,"date":"2018-09-07T13:56:32","date_gmt":"2018-09-07T13:56:32","guid":{"rendered":"https:\/\/andreasphysioblog.com\/?p=2430"},"modified":"2021-06-16T20:06:55","modified_gmt":"2021-06-16T20:06:55","slug":"quadriceps-strength-and-functional-performance-after-anterior-cruciate-ligament-reconstruction-in-professional-soccer-players-at-time-of-return-to-sport","status":"publish","type":"post","link":"https:\/\/andreasphysioblog.com\/?p=2430","title":{"rendered":"Quadriceps Strength and Functional Performance After Anterior Cruciate Ligament Reconstruction in Professional Soccer players at Time of Return to Sport"},"content":{"rendered":"<header class=\"entry-header\">\n<h1 class=\"entry-title\">Quadriceps Strength and Functional Performance After Anterior Cruciate Ligament Reconstruction in Professional Soccer players at Time of Return to\u00a0Sport<\/h1>\n<\/header>\n<div class=\"entry-body\">\n<div class=\"entry-meta\"><\/div>\n<div class=\"entry-content\">\n<div id=\"ej-journal-doi\">doi: 10.1519\/JSC.0000000000002749,\u00a0<span id=\"ej-journal-date-volume-issue-pg\"><a href=\"https:\/\/journals.lww.com\/nsca-jscr\/toc\/9000\/00000\">August 17, 2018<\/a><\/span><img decoding=\"async\" class=\"alignnone size-full wp-image-14338\" src=\"https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-19-47.png?w=825\" sizes=\"(max-width: 825px) 100vw, 825px\" srcset=\"https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-19-47.png?w=825 825w, https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-19-47.png?w=150 150w, https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-19-47.png?w=300 300w, https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-19-47.png?w=768 768w, https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-19-47.png?w=1024 1024w, https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-19-47.png 1522w\" alt=\"Sk\u00e6rmbillede 2018-09-07 kl. 11.19.47.png\" data-attachment-id=\"14338\" data-permalink=\"https:\/\/physioblogandreasbjerregaard.com\/2018\/09\/07\/quadriceps-strength-and-functional-performance-after-anterior-cruciate-ligament-reconstruction-in-professional-soccer-players-at-time-of-return-to-sport\/skaermbillede-2018-09-07-kl-11-19-47\/\" data-orig-file=\"https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-19-47.png\" data-orig-size=\"1522,466\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Sk\u00e6rmbillede 2018-09-07 kl. 11.19.47\" data-image-description=\"\" data-medium-file=\"https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-19-47.png?w=300\" data-large-file=\"https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-19-47.png?w=825\" \/><\/div>\n<div>Background<\/div>\n<div>Poor quadriceps strength has been associated with poor outcome after anterior cruciate ligament (ACL) reconstruction (ACLR).<\/div>\n<div><strong>Aim<\/strong><\/div>\n<div>This study aims to assess quadriceps strength, muscle\u00a0<span class=\"ej-keyword\">inhibition<\/span>, and hop test performance in professional soccer players after ACLR.<\/div>\n<div><strong>Who<\/strong><\/div>\n<div>15 professional soccer players (age 22.3 \u00b1 3.1 years, body mass 81.0 \u00b1 11.5 kg, and height 1.75 \u00b1 0.1 m) who had undergone ACLR participated.\u00a0<span class=\"ej-keyword\">Isometric<\/span>,\u00a0<span class=\"ej-keyword\">eccentric<\/span>, and\u00a0<span class=\"ej-keyword\">concentric<\/span>\u00a0quadriceps strength was assessed, along with quadriceps\u00a0<span class=\"ej-keyword\">inhibition<\/span>\u00a0and single and cross-over hop performance, at the time of return to full-time unrestricted play.<\/div>\n<div><strong>Result<\/strong><\/div>\n<div>In comparison with the uninjured leg, the ACLR leg demonstrated large significant (<em>d<\/em>\u00a0\u2265 0.84,\u00a0<em>p<\/em>\u00a0&lt; 0.01) deficits in\u00a0<span class=\"ej-keyword\">isometric<\/span>,\u00a0<span class=\"ej-keyword\">eccentric<\/span>, and\u00a0<span class=\"ej-keyword\">concentric<\/span>\u00a0quadriceps strength, quadriceps\u00a0<span class=\"ej-keyword\">inhibition<\/span>, and hop distance.<\/div>\n<div>Over 80% of the players failed to exceed the limb symmetry criteria of \u226590% for strength tests, although 75% of the cohort passed the \u226590% criteria for hop tests.<\/div>\n<div>The outcome from ACLR in professional soccer players who received full-time intensive rehabilitation has not previously been reported in detail.<\/div>\n<div><strong>Conclusion<\/strong><\/div>\n<div>There were significant deficits in quadriceps strength at the time of return to sport, whereas hop testing, a commonly used outcome measure, failed to show the same levels of deficit. These deficits in quadriceps function may have implications for the development of ongoing knee symptoms and risk of future ACL injury.<\/div>\n<div><\/div>\n<div><img decoding=\"async\" class=\"alignnone size-full wp-image-14340\" src=\"https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-29-09.png?w=825\" sizes=\"(max-width: 825px) 100vw, 825px\" srcset=\"https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-29-09.png?w=825 825w, https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-29-09.png?w=1650 1650w, https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-29-09.png?w=150 150w, https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-29-09.png?w=300 300w, https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-29-09.png?w=768 768w, https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-29-09.png?w=1024 1024w\" alt=\"Sk\u00e6rmbillede 2018-09-07 kl. 11.29.09.png\" data-attachment-id=\"14340\" data-permalink=\"https:\/\/physioblogandreasbjerregaard.com\/2018\/09\/07\/quadriceps-strength-and-functional-performance-after-anterior-cruciate-ligament-reconstruction-in-professional-soccer-players-at-time-of-return-to-sport\/skaermbillede-2018-09-07-kl-11-29-09\/\" data-orig-file=\"https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-29-09.png\" data-orig-size=\"2206,948\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Sk\u00e6rmbillede 2018-09-07 kl. 11.29.09\" data-image-description=\"\" data-medium-file=\"https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-29-09.png?w=300\" data-large-file=\"https:\/\/andreasbjerregaard.files.wordpress.com\/2018\/09\/skc3a6rmbillede-2018-09-07-kl-11-29-09.png?w=825\" \/><\/div>\n<div id=\"jp-post-flair\" class=\"sharedaddy sd-like-enabled sd-sharing-enabled\">\n<div class=\"sharedaddy sd-sharing-enabled\">\n<div class=\"robots-nocontent sd-block sd-social sd-social-icon-text sd-sharing\">\n<h3 class=\"sd-title\">Share this:<\/h3>\n<div class=\"sd-content\">\n<ul data-sharing-events-added=\"true\">\n<li class=\"share-twitter\"><a class=\"share-twitter sd-button share-icon\" title=\"Click to share on Twitter\" href=\"https:\/\/physioblogandreasbjerregaard.com\/2018\/09\/07\/quadriceps-strength-and-functional-performance-after-anterior-cruciate-ligament-reconstruction-in-professional-soccer-players-at-time-of-return-to-sport\/?share=twitter&amp;nb=1\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-twitter-14337\">Twitter<\/a><\/li>\n<li class=\"share-facebook\"><a class=\"share-facebook sd-button share-icon\" title=\"Click to share on Facebook\" href=\"https:\/\/physioblogandreasbjerregaard.com\/2018\/09\/07\/quadriceps-strength-and-functional-performance-after-anterior-cruciate-ligament-reconstruction-in-professional-soccer-players-at-time-of-return-to-sport\/?share=facebook&amp;nb=1\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" data-shared=\"sharing-facebook-14337\">Facebook<\/a><\/li>\n<li class=\"share-end\"><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"like-post-wrapper-49480562-14337-60c60eaaa433b\" class=\"sharedaddy sd-block sd-like jetpack-likes-widget-wrapper jetpack-likes-widget-loaded\" data-src=\"\/\/widgets.wp.com\/likes\/index.html?ver=20210413#blog_id=49480562&amp;post_id=14337&amp;origin=andreasbjerregaard.wordpress.com&amp;obj_id=49480562-14337-60c60eaaa433b&amp;domain=physioblogandreasbjerregaard.com\" data-name=\"like-post-frame-49480562-14337-60c60eaaa433b\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Quadriceps Strength and Functional Performance After Anterior Cruciate Ligament Reconstruction in Professional Soccer players at Time of Return to\u00a0Sport doi: 10.1519\/JSC.0000000000002749,\u00a0August 17, 2018 Background Poor quadriceps strength has been associated with poor outcome after anterior cruciate ligament (ACL) reconstruction (ACLR). Aim This study aims to assess quadriceps strength, muscle\u00a0inhibition, and hop test performance in professional soccer players after ACLR. Who 15 professional soccer players (age 22.3 \u00b1 3.1 years, body mass 81.0 \u00b1 11.5 kg, and height 1.75 \u00b1 0.1 m) who had undergone ACLR participated.\u00a0Isometric,\u00a0eccentric, and\u00a0concentric\u00a0quadriceps strength was assessed, along with quadriceps\u00a0inhibition\u00a0and single and cross-over hop performance, at the time of return to full-time unrestricted play. Result In comparison with the uninjured leg, the ACLR leg demonstrated large significant (d\u00a0\u2265 0.84,\u00a0p\u00a0&lt; 0.01) deficits in\u00a0isometric,\u00a0eccentric, and\u00a0concentric\u00a0quadriceps strength, quadriceps\u00a0inhibition, and hop distance. Over 80% of the players failed to exceed the limb symmetry criteria of \u226590% for strength tests, although 75% of the cohort passed the \u226590% criteria for hop tests. The outcome from ACLR in professional soccer players who received full-time intensive rehabilitation has not previously been reported in detail. Conclusion There were significant deficits in quadriceps strength at the time of return to sport, whereas hop testing, a commonly used outcome measure, failed to show the same levels of deficit. These deficits in quadriceps function may have implications for the development of ongoing knee symptoms and risk of future ACL injury. 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