Effects of knee flexor submaximal isometric contraction until exhaustion on semitendinosus and biceps femoris long head shear modulus in healthy individuals
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 individ...
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| Veröffentlicht in: | Scientific reports 2020-10, Vol.10 (1), p.16433-16433, Article 16433 |
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| description | 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 ± 192.5 s; day 2: 474.6 ± 131.7 s; p = 0.323). At the start of the fatigue task, the ST showed greater active stiffness than the BFlh (p |
| doi_str_mv | 10.1038/s41598-020-73433-1 |
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Twelve healthy individuals participated in 2 sessions separated by 7 days. Time to exhaustion was similar in both sessions (day 1: 443.8 ± 192.5 s; day 2: 474.6 ± 131.7 s; p = 0.323). At the start of the fatigue task, the ST showed greater active stiffness than the BFlh (p < 0.001), with no differences between days (p = 0.08). The ST active stiffness then decreased from 40% of the task time to exhaustion (− 2.2 to − 13.3%, p = 0.027) until the end of the task (− 16.1 to − 22.9%, p = 0.012), while no significant changes were noted in the BFlh (p = 0.771). Immediately after the fatigue task, a decrease in active stiffness was observed in the ST (− 11.8 to − 17.8%, p < 0.001), but not in the BFlh (p = 0.551). Results were consistent between the 2 testing sessions (p = 0.07–0.959). The present results indicate that fatigue alters the hamstring active stiffness pattern.</description><identifier>ISSN: 2045-2322</identifier><identifier>EISSN: 2045-2322</identifier><identifier>DOI: 10.1038/s41598-020-73433-1</identifier><identifier>PMID: 33009453</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>692/698/1671/1668/1973 ; 692/700/1421/1860 ; Adult ; Elasticity Imaging Techniques - methods ; Electromyography - methods ; Fatigue ; Femur Head - physiology ; Humanities and Social Sciences ; Humans ; Isometric ; Isometric Contraction - physiology ; Knee ; Knee - physiology ; Knee Joint - physiology ; Male ; multidisciplinary ; Muscle contraction ; Muscle, Skeletal - physiology ; Range of Motion, Articular - physiology ; Science ; Science (multidisciplinary) ; Ultrasonography - methods ; Ultrasound ; Young Adult</subject><ispartof>Scientific reports, 2020-10, Vol.10 (1), p.16433-16433, Article 16433</ispartof><rights>The Author(s) 2020</rights><rights>The Author(s) 2020. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c522t-fb358be8ac7798df3e2e51e9063c7f36d46c4cc6545e4cc92a3616cc956571453</citedby><cites>FETCH-LOGICAL-c522t-fb358be8ac7798df3e2e51e9063c7f36d46c4cc6545e4cc92a3616cc956571453</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7532170/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7532170/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,864,885,27924,27925,41120,42189,51576,53791,53793</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33009453$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Mendes, Bruno</creatorcontrib><creatorcontrib>Firmino, Telmo</creatorcontrib><creatorcontrib>Oliveira, Raúl</creatorcontrib><creatorcontrib>Neto, Tiago</creatorcontrib><creatorcontrib>Cruz-Montecinos, Carlos</creatorcontrib><creatorcontrib>Cerda, Mauricio</creatorcontrib><creatorcontrib>Correia, José P.</creatorcontrib><creatorcontrib>Vaz, João R.</creatorcontrib><creatorcontrib>Freitas, Sandro R.</creatorcontrib><title>Effects of knee flexor submaximal isometric contraction until exhaustion on semitendinosus and biceps femoris long head shear modulus in healthy individuals</title><title>Scientific reports</title><addtitle>Sci Rep</addtitle><addtitle>Sci Rep</addtitle><description>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 ± 192.5 s; day 2: 474.6 ± 131.7 s; p = 0.323). At the start of the fatigue task, the ST showed greater active stiffness than the BFlh (p < 0.001), with no differences between days (p = 0.08). The ST active stiffness then decreased from 40% of the task time to exhaustion (− 2.2 to − 13.3%, p = 0.027) until the end of the task (− 16.1 to − 22.9%, p = 0.012), while no significant changes were noted in the BFlh (p = 0.771). Immediately after the fatigue task, a decrease in active stiffness was observed in the ST (− 11.8 to − 17.8%, p < 0.001), but not in the BFlh (p = 0.551). Results were consistent between the 2 testing sessions (p = 0.07–0.959). The present results indicate that fatigue alters the hamstring active stiffness pattern.</description><subject>692/698/1671/1668/1973</subject><subject>692/700/1421/1860</subject><subject>Adult</subject><subject>Elasticity Imaging Techniques - methods</subject><subject>Electromyography - methods</subject><subject>Fatigue</subject><subject>Femur Head - physiology</subject><subject>Humanities and Social Sciences</subject><subject>Humans</subject><subject>Isometric</subject><subject>Isometric Contraction - physiology</subject><subject>Knee</subject><subject>Knee - physiology</subject><subject>Knee Joint - physiology</subject><subject>Male</subject><subject>multidisciplinary</subject><subject>Muscle contraction</subject><subject>Muscle, Skeletal - physiology</subject><subject>Range of Motion, Articular - physiology</subject><subject>Science</subject><subject>Science (multidisciplinary)</subject><subject>Ultrasonography - methods</subject><subject>Ultrasound</subject><subject>Young Adult</subject><issn>2045-2322</issn><issn>2045-2322</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>C6C</sourceid><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp9kc1u1DAUhSMEolXpC3SBLLFhk-Lf_GyQUFWgUqVuYG15nOsZF8cefJNq-i59WJxOWwqLWpHv1fXnk5ycqjph9JRR0X1CyVTf1ZTTuhVSiJq9qg45larmgvPXz_qD6hjxmpaleC9Z_7Y6EILSXipxWN2dOwd2QpIc-RUBiAuwS5ngvBrNzo8mEI9phCl7S2yKUzZ28imSOU4-ENhtzIz3g_IgjH6COPiYcEZi4kBW3sIWiYMxZY8kpLgmGzADwbJnMqZhDgX1cZmGaXNb2sHf-GE2Ad9Vb1wpcPxQj6qfX89_nH2vL6--XZx9uayt4nyq3UqobgWdsW3bd4MTwEEx6GkjbOtEM8jGSmsbJRWU2nMjGtaURjWqZeU3HFWf97rb4hoGC4vNoLe5-M-3Ohmv_z2JfqPX6Ua3SnDW0iLw8UEgp98z4KRHjxZCMBHSjJpL2UnGecMK-uE_9DrNORZ7C1VCkZ0SheJ7yuaEmME9fQyjeslf7_PXJX99n79epN8_t_F05THtAog9gOUoriH_ffcLsn8A-gO_2Q</recordid><startdate>20201002</startdate><enddate>20201002</enddate><creator>Mendes, Bruno</creator><creator>Firmino, Telmo</creator><creator>Oliveira, Raúl</creator><creator>Neto, Tiago</creator><creator>Cruz-Montecinos, Carlos</creator><creator>Cerda, Mauricio</creator><creator>Correia, José P.</creator><creator>Vaz, João R.</creator><creator>Freitas, Sandro R.</creator><general>Nature Publishing Group UK</general><general>Nature Publishing Group</general><scope>C6C</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7X7</scope><scope>7XB</scope><scope>88A</scope><scope>88E</scope><scope>88I</scope><scope>8FE</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>LK8</scope><scope>M0S</scope><scope>M1P</scope><scope>M2P</scope><scope>M7P</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20201002</creationdate><title>Effects of knee flexor submaximal isometric contraction until exhaustion on semitendinosus and biceps femoris long head shear modulus in healthy individuals</title><author>Mendes, Bruno ; Firmino, Telmo ; Oliveira, Raúl ; Neto, Tiago ; Cruz-Montecinos, Carlos ; Cerda, Mauricio ; Correia, José P. ; Vaz, João R. ; Freitas, Sandro R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c522t-fb358be8ac7798df3e2e51e9063c7f36d46c4cc6545e4cc92a3616cc956571453</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>692/698/1671/1668/1973</topic><topic>692/700/1421/1860</topic><topic>Adult</topic><topic>Elasticity Imaging Techniques - methods</topic><topic>Electromyography - methods</topic><topic>Fatigue</topic><topic>Femur Head - physiology</topic><topic>Humanities and Social Sciences</topic><topic>Humans</topic><topic>Isometric</topic><topic>Isometric Contraction - physiology</topic><topic>Knee</topic><topic>Knee - physiology</topic><topic>Knee Joint - physiology</topic><topic>Male</topic><topic>multidisciplinary</topic><topic>Muscle contraction</topic><topic>Muscle, Skeletal - physiology</topic><topic>Range of Motion, Articular - physiology</topic><topic>Science</topic><topic>Science (multidisciplinary)</topic><topic>Ultrasonography - methods</topic><topic>Ultrasound</topic><topic>Young Adult</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mendes, Bruno</creatorcontrib><creatorcontrib>Firmino, Telmo</creatorcontrib><creatorcontrib>Oliveira, Raúl</creatorcontrib><creatorcontrib>Neto, Tiago</creatorcontrib><creatorcontrib>Cruz-Montecinos, Carlos</creatorcontrib><creatorcontrib>Cerda, Mauricio</creatorcontrib><creatorcontrib>Correia, José P.</creatorcontrib><creatorcontrib>Vaz, João R.</creatorcontrib><creatorcontrib>Freitas, Sandro R.</creatorcontrib><collection>Springer Nature OA Free Journals</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Biology Database (Alumni Edition)</collection><collection>Medical Database (Alumni Edition)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>Biological Science Collection</collection><collection>ProQuest Central</collection><collection>Natural Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Central Student</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>ProQuest Biological Science Collection</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>Science Database</collection><collection>Biological Science Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central Basic</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Scientific reports</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mendes, Bruno</au><au>Firmino, Telmo</au><au>Oliveira, Raúl</au><au>Neto, Tiago</au><au>Cruz-Montecinos, Carlos</au><au>Cerda, Mauricio</au><au>Correia, José P.</au><au>Vaz, João R.</au><au>Freitas, Sandro R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of knee flexor submaximal isometric contraction until exhaustion on semitendinosus and biceps femoris long head shear modulus in healthy individuals</atitle><jtitle>Scientific reports</jtitle><stitle>Sci Rep</stitle><addtitle>Sci Rep</addtitle><date>2020-10-02</date><risdate>2020</risdate><volume>10</volume><issue>1</issue><spage>16433</spage><epage>16433</epage><pages>16433-16433</pages><artnum>16433</artnum><issn>2045-2322</issn><eissn>2045-2322</eissn><abstract>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 ± 192.5 s; day 2: 474.6 ± 131.7 s; p = 0.323). At the start of the fatigue task, the ST showed greater active stiffness than the BFlh (p < 0.001), with no differences between days (p = 0.08). The ST active stiffness then decreased from 40% of the task time to exhaustion (− 2.2 to − 13.3%, p = 0.027) until the end of the task (− 16.1 to − 22.9%, p = 0.012), while no significant changes were noted in the BFlh (p = 0.771). Immediately after the fatigue task, a decrease in active stiffness was observed in the ST (− 11.8 to − 17.8%, p < 0.001), but not in the BFlh (p = 0.551). Results were consistent between the 2 testing sessions (p = 0.07–0.959). The present results indicate that fatigue alters the hamstring active stiffness pattern.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>33009453</pmid><doi>10.1038/s41598-020-73433-1</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | 692/698/1671/1668/1973 692/700/1421/1860 Adult Elasticity Imaging Techniques - methods Electromyography - methods Fatigue Femur Head - physiology Humanities and Social Sciences Humans Isometric Isometric Contraction - physiology Knee Knee - physiology Knee Joint - physiology Male multidisciplinary Muscle contraction Muscle, Skeletal - physiology Range of Motion, Articular - physiology Science Science (multidisciplinary) Ultrasonography - methods Ultrasound Young Adult |
| title | Effects of knee flexor submaximal isometric contraction until exhaustion on semitendinosus and biceps femoris long head shear modulus in healthy individuals |
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