{"id":4231,"date":"2023-06-20T15:10:22","date_gmt":"2023-06-20T15:10:22","guid":{"rendered":"https:\/\/scian.cl\/scientific-image-analysis\/?p=4231"},"modified":"2023-06-20T15:10:22","modified_gmt":"2023-06-20T15:10:22","slug":"effects-of-knee-flexor-submaximal-isometric-contraction-until-exhaustion-on-semitendinosus-and-biceps-femoris-long-head-shear-modulus-in-healthy-individuals","status":"publish","type":"post","link":"https:\/\/scian.cl\/scientific-image-analysis\/effects-of-knee-flexor-submaximal-isometric-contraction-until-exhaustion-on-semitendinosus-and-biceps-femoris-long-head-shear-modulus-in-healthy-individuals\/","title":{"rendered":"Effects of knee flexor submaximal isometric contraction until exhaustion on semitendinosus and biceps femoris long head shear modulus in healthy individuals"},"content":{"rendered":"\n<p>Scientific Reports<\/p>\n\n\n\n<p>Mendes, B., Firmino, T., Oliveira, R., Neto, T., Cruz-Montecinos, C., Cerda, M., \u2026 &amp; Freitas, S. R.<\/p>\n\n\n\n<p><strong>ABSTRACT<\/strong><br>This study examined whether a knee flexor isometric contraction at 20% of maximal voluntary isometric contraction until exhaustion would alter the biceps femoris long head (BFlh) and semitendinosus (ST) active stiffness, assessed using ultrasound-based shear wave elastography. Twelve healthy individuals participated in 2 sessions separated by 7 days. Time to exhaustion was similar in both sessions (day 1: 443.8\u2009\u00b1\u2009192.5 s; day 2: 474.6\u2009\u00b1\u2009131.7 s; p\u2009=\u20090.323). At the start of the fatigue task, the ST showed greater active stiffness than the BFlh (p\u2009&lt;\u20090.001), with no differences between days (p\u2009=\u20090.08). The ST active stiffness then decreased from 40% of the task time to exhaustion (\u2212 2.2 to \u2212 13.3%, p\u2009=\u20090.027) until the end of the task (\u2212 16.1 to \u2212 22.9%, p\u2009=\u20090.012), while no significant changes were noted in the BFlh (p\u2009=\u20090.771). Immediately after the fatigue task, a decrease in active stiffness was observed in the ST (\u2212 11.8 to \u2212 17.8%, p\u2009&lt;\u20090.001), but not in the BFlh (p\u2009=\u20090.551). Results were consistent between the 2 testing sessions (p\u2009=\u20090.07\u20130.959). The present results indicate that fatigue alters the hamstring active stiffness pattern.<\/p>\n\n\n\n<p><a href=\"https:\/\/doi.org\/10.1038\/s41598-020-73433-1\">https:\/\/doi.org\/10.1038\/s41598-020-73433-1<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mendes, B., Firmino, T., Oliveira, R., Neto, T., Cruz-Montecinos, C., Cerda, M., &#8230; &#038; Freitas, S. R. (2020). Effects of knee flexor submaximal isometric contraction until exhaustion on semitendinosus and biceps femoris long head shear modulus in healthy individuals. Scientific Reports, 10(1), 16433.<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[8],"tags":[],"class_list":["post-4231","post","type-post","status-publish","format-standard","hentry","category-publications-2020"],"_links":{"self":[{"href":"https:\/\/scian.cl\/scientific-image-analysis\/wp-json\/wp\/v2\/posts\/4231","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/scian.cl\/scientific-image-analysis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/scian.cl\/scientific-image-analysis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/scian.cl\/scientific-image-analysis\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/scian.cl\/scientific-image-analysis\/wp-json\/wp\/v2\/comments?post=4231"}],"version-history":[{"count":3,"href":"https:\/\/scian.cl\/scientific-image-analysis\/wp-json\/wp\/v2\/posts\/4231\/revisions"}],"predecessor-version":[{"id":4234,"href":"https:\/\/scian.cl\/scientific-image-analysis\/wp-json\/wp\/v2\/posts\/4231\/revisions\/4234"}],"wp:attachment":[{"href":"https:\/\/scian.cl\/scientific-image-analysis\/wp-json\/wp\/v2\/media?parent=4231"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/scian.cl\/scientific-image-analysis\/wp-json\/wp\/v2\/categories?post=4231"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/scian.cl\/scientific-image-analysis\/wp-json\/wp\/v2\/tags?post=4231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}