Electromechanical delay of the knee extensor muscles: comparison among young, middle-age and older individuals
Summary The aim of this study was to investigate the effects of the ageing process in the electromechanical delay (EMD), rate of torque development (RTD) and peak torque (PT) of the knee extensor muscles. The volunteers were assigned to three groups: young group (YG – 23·44 ± 4·74 years, 78·14 ± 15·...
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| Veröffentlicht in: | Clinical physiology and functional imaging 2015-07, Vol.35 (4), p.245-249 |
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| creator | Libardi, Cleiton A. Souza, Thiago M. F. Conceição, Miguel S. Bonganha, Valéria Chacon-Mikahil, Mara Patricia T. Cavaglieri, Cláudia R. de Moraes, Antonio C. Ugrinowitsch, Carlos |
| description | Summary
The aim of this study was to investigate the effects of the ageing process in the electromechanical delay (EMD), rate of torque development (RTD) and peak torque (PT) of the knee extensor muscles. The volunteers were assigned to three groups: young group (YG – 23·44 ± 4·74 years, 78·14 ± 15·11 kg, 1·72 ± 0·05 m), middle‐aged group (MAG – 49·56 ± 6·06 years, 72·01 ± 14·07 kg, 1·67 ± 0·06 m) and elderly group (EG – 68·67 ± 9·06 years, 67·96 ± 7·60 kg, 1·64 ± 0·07 m). The PT and RTD were assessed during maximal voluntary ballistic isometric contractions (MVBIC) in the isokinetic dynamometer. Muscle electrical activity was recorded (EMG) during MVBIC in the vastus lateralis (VL), vastus medialis (VM) and rectus femoris (RF) muscles. The EMD was calculated during the MVBIC, through the time interval between the EMG onset and torque onset. The PT and RTD were higher in the YG than in the MAG (P = 0·02; P = 0·01, respectively) and in the EG (P = 0·002; P = 0·0004, respectively). There were no significant differences in EMD among the three age groups for the VL, VM and RF (P>0·05) muscles. We conclude that age affects the PT and RTD, but not EMD of the VL, VM and RF muscles. |
| doi_str_mv | 10.1111/cpf.12157 |
| format | Article |
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The aim of this study was to investigate the effects of the ageing process in the electromechanical delay (EMD), rate of torque development (RTD) and peak torque (PT) of the knee extensor muscles. The volunteers were assigned to three groups: young group (YG – 23·44 ± 4·74 years, 78·14 ± 15·11 kg, 1·72 ± 0·05 m), middle‐aged group (MAG – 49·56 ± 6·06 years, 72·01 ± 14·07 kg, 1·67 ± 0·06 m) and elderly group (EG – 68·67 ± 9·06 years, 67·96 ± 7·60 kg, 1·64 ± 0·07 m). The PT and RTD were assessed during maximal voluntary ballistic isometric contractions (MVBIC) in the isokinetic dynamometer. Muscle electrical activity was recorded (EMG) during MVBIC in the vastus lateralis (VL), vastus medialis (VM) and rectus femoris (RF) muscles. The EMD was calculated during the MVBIC, through the time interval between the EMG onset and torque onset. The PT and RTD were higher in the YG than in the MAG (P = 0·02; P = 0·01, respectively) and in the EG (P = 0·002; P = 0·0004, respectively). There were no significant differences in EMD among the three age groups for the VL, VM and RF (P>0·05) muscles. We conclude that age affects the PT and RTD, but not EMD of the VL, VM and RF muscles.</description><identifier>ISSN: 1475-0961</identifier><identifier>EISSN: 1475-097X</identifier><identifier>DOI: 10.1111/cpf.12157</identifier><identifier>PMID: 24797398</identifier><identifier>CODEN: CPFICA</identifier><language>eng</language><publisher>England: Blackwell Publishing Ltd</publisher><subject>Adult ; Aged ; Aging - physiology ; ballistic ; elderly ; electromechanical delay ; Electromyography ; Excitation Contraction Coupling - physiology ; Female ; Humans ; Isometric Contraction - physiology ; Knee Joint - physiology ; Male ; Middle Aged ; Muscle, Skeletal - physiology ; peak torque ; Physical Endurance - physiology ; rate of torque development ; Reproducibility of Results ; Sensitivity and Specificity ; Torque ; Young Adult</subject><ispartof>Clinical physiology and functional imaging, 2015-07, Vol.35 (4), p.245-249</ispartof><rights>2014 Scandinavian Society of Clinical Physiology and Nuclear Medicine. Published by John Wiley & Sons Ltd</rights><rights>2014 Scandinavian Society of Clinical Physiology and Nuclear Medicine. Published by John Wiley & Sons Ltd.</rights><rights>Copyright © 2015 Scandinavian Society of Clinical Physiology and Nuclear Medicine</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4617-bc642d085ea6170c3d303cf5b2f57a5e8a239e2a82c80a6e23fa99b713df0e4d3</citedby><cites>FETCH-LOGICAL-c4617-bc642d085ea6170c3d303cf5b2f57a5e8a239e2a82c80a6e23fa99b713df0e4d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fcpf.12157$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fcpf.12157$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24797398$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Libardi, Cleiton A.</creatorcontrib><creatorcontrib>Souza, Thiago M. F.</creatorcontrib><creatorcontrib>Conceição, Miguel S.</creatorcontrib><creatorcontrib>Bonganha, Valéria</creatorcontrib><creatorcontrib>Chacon-Mikahil, Mara Patricia T.</creatorcontrib><creatorcontrib>Cavaglieri, Cláudia R.</creatorcontrib><creatorcontrib>de Moraes, Antonio C.</creatorcontrib><creatorcontrib>Ugrinowitsch, Carlos</creatorcontrib><title>Electromechanical delay of the knee extensor muscles: comparison among young, middle-age and older individuals</title><title>Clinical physiology and functional imaging</title><addtitle>Clin Physiol Funct Imaging</addtitle><description>Summary
The aim of this study was to investigate the effects of the ageing process in the electromechanical delay (EMD), rate of torque development (RTD) and peak torque (PT) of the knee extensor muscles. The volunteers were assigned to three groups: young group (YG – 23·44 ± 4·74 years, 78·14 ± 15·11 kg, 1·72 ± 0·05 m), middle‐aged group (MAG – 49·56 ± 6·06 years, 72·01 ± 14·07 kg, 1·67 ± 0·06 m) and elderly group (EG – 68·67 ± 9·06 years, 67·96 ± 7·60 kg, 1·64 ± 0·07 m). The PT and RTD were assessed during maximal voluntary ballistic isometric contractions (MVBIC) in the isokinetic dynamometer. Muscle electrical activity was recorded (EMG) during MVBIC in the vastus lateralis (VL), vastus medialis (VM) and rectus femoris (RF) muscles. The EMD was calculated during the MVBIC, through the time interval between the EMG onset and torque onset. The PT and RTD were higher in the YG than in the MAG (P = 0·02; P = 0·01, respectively) and in the EG (P = 0·002; P = 0·0004, respectively). There were no significant differences in EMD among the three age groups for the VL, VM and RF (P>0·05) muscles. We conclude that age affects the PT and RTD, but not EMD of the VL, VM and RF muscles.</description><subject>Adult</subject><subject>Aged</subject><subject>Aging - physiology</subject><subject>ballistic</subject><subject>elderly</subject><subject>electromechanical delay</subject><subject>Electromyography</subject><subject>Excitation Contraction Coupling - physiology</subject><subject>Female</subject><subject>Humans</subject><subject>Isometric Contraction - physiology</subject><subject>Knee Joint - physiology</subject><subject>Male</subject><subject>Middle Aged</subject><subject>Muscle, Skeletal - physiology</subject><subject>peak torque</subject><subject>Physical Endurance - physiology</subject><subject>rate of torque development</subject><subject>Reproducibility of Results</subject><subject>Sensitivity and Specificity</subject><subject>Torque</subject><subject>Young Adult</subject><issn>1475-0961</issn><issn>1475-097X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp1kUlvFDEQhS0EIgsc-APIEhci0YmXdrs7NzTKhsIiFJab5bGrJ07c9sTuDpl_H4dJ5oBEXV6V9NVTqR5CbyjZp6UOzLLfp4wK-Qxt01qKinTy9_NN39AttJPzFSFU8lq-RFuslp3kXbuNwpEHM6Y4gLnUwRntsQWvVzj2eLwEfB0AMNyNEHJMeJiy8ZAPsYnDUieXY8B6iGGBV3EKiw94cNZ6qPQCsA4WR28hYResu3V20j6_Qi_6IvD6UXfRj-Oji9lpdf715Gz28bwydUNlNTdNzSxpBegyEsMtJ9z0Ys56IbWAVjPeAdMtMy3RDTDe666bS8ptT6C2fBe9X_suU7yZII9qcNmA9zpAnLKiTdtxShsmCvruH_QqTimU6x4oKRtBSF2ovTVlUsw5Qa-WyQ06rRQl6iEEVUJQf0Mo7NtHx2k-gN2QT18vwMEa-OM8rP7vpGbfjp8sq_WGyyPcbTZ0ulaN5FKoX19O1Pefp_TThfysJL8HftqgkA</recordid><startdate>201507</startdate><enddate>201507</enddate><creator>Libardi, Cleiton A.</creator><creator>Souza, Thiago M. F.</creator><creator>Conceição, Miguel S.</creator><creator>Bonganha, Valéria</creator><creator>Chacon-Mikahil, Mara Patricia T.</creator><creator>Cavaglieri, Cláudia R.</creator><creator>de Moraes, Antonio C.</creator><creator>Ugrinowitsch, Carlos</creator><general>Blackwell Publishing Ltd</general><general>Wiley Subscription Services, Inc</general><scope>BSCLL</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>7QP</scope><scope>7TS</scope><scope>7U5</scope><scope>8FD</scope><scope>K9.</scope><scope>L7M</scope><scope>7X8</scope></search><sort><creationdate>201507</creationdate><title>Electromechanical delay of the knee extensor muscles: comparison among young, middle-age and older individuals</title><author>Libardi, Cleiton A. ; Souza, Thiago M. F. ; Conceição, Miguel S. ; Bonganha, Valéria ; Chacon-Mikahil, Mara Patricia T. ; Cavaglieri, Cláudia R. ; de Moraes, Antonio C. ; Ugrinowitsch, Carlos</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4617-bc642d085ea6170c3d303cf5b2f57a5e8a239e2a82c80a6e23fa99b713df0e4d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Adult</topic><topic>Aged</topic><topic>Aging - physiology</topic><topic>ballistic</topic><topic>elderly</topic><topic>electromechanical delay</topic><topic>Electromyography</topic><topic>Excitation Contraction Coupling - physiology</topic><topic>Female</topic><topic>Humans</topic><topic>Isometric Contraction - physiology</topic><topic>Knee Joint - physiology</topic><topic>Male</topic><topic>Middle Aged</topic><topic>Muscle, Skeletal - physiology</topic><topic>peak torque</topic><topic>Physical Endurance - physiology</topic><topic>rate of torque development</topic><topic>Reproducibility of Results</topic><topic>Sensitivity and Specificity</topic><topic>Torque</topic><topic>Young Adult</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Libardi, Cleiton A.</creatorcontrib><creatorcontrib>Souza, Thiago M. F.</creatorcontrib><creatorcontrib>Conceição, Miguel S.</creatorcontrib><creatorcontrib>Bonganha, Valéria</creatorcontrib><creatorcontrib>Chacon-Mikahil, Mara Patricia T.</creatorcontrib><creatorcontrib>Cavaglieri, Cláudia R.</creatorcontrib><creatorcontrib>de Moraes, Antonio C.</creatorcontrib><creatorcontrib>Ugrinowitsch, Carlos</creatorcontrib><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Calcium & Calcified Tissue Abstracts</collection><collection>Physical Education Index</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Clinical physiology and functional imaging</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Libardi, Cleiton A.</au><au>Souza, Thiago M. F.</au><au>Conceição, Miguel S.</au><au>Bonganha, Valéria</au><au>Chacon-Mikahil, Mara Patricia T.</au><au>Cavaglieri, Cláudia R.</au><au>de Moraes, Antonio C.</au><au>Ugrinowitsch, Carlos</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electromechanical delay of the knee extensor muscles: comparison among young, middle-age and older individuals</atitle><jtitle>Clinical physiology and functional imaging</jtitle><addtitle>Clin Physiol Funct Imaging</addtitle><date>2015-07</date><risdate>2015</risdate><volume>35</volume><issue>4</issue><spage>245</spage><epage>249</epage><pages>245-249</pages><issn>1475-0961</issn><eissn>1475-097X</eissn><coden>CPFICA</coden><abstract>Summary
The aim of this study was to investigate the effects of the ageing process in the electromechanical delay (EMD), rate of torque development (RTD) and peak torque (PT) of the knee extensor muscles. The volunteers were assigned to three groups: young group (YG – 23·44 ± 4·74 years, 78·14 ± 15·11 kg, 1·72 ± 0·05 m), middle‐aged group (MAG – 49·56 ± 6·06 years, 72·01 ± 14·07 kg, 1·67 ± 0·06 m) and elderly group (EG – 68·67 ± 9·06 years, 67·96 ± 7·60 kg, 1·64 ± 0·07 m). The PT and RTD were assessed during maximal voluntary ballistic isometric contractions (MVBIC) in the isokinetic dynamometer. Muscle electrical activity was recorded (EMG) during MVBIC in the vastus lateralis (VL), vastus medialis (VM) and rectus femoris (RF) muscles. The EMD was calculated during the MVBIC, through the time interval between the EMG onset and torque onset. The PT and RTD were higher in the YG than in the MAG (P = 0·02; P = 0·01, respectively) and in the EG (P = 0·002; P = 0·0004, respectively). There were no significant differences in EMD among the three age groups for the VL, VM and RF (P>0·05) muscles. We conclude that age affects the PT and RTD, but not EMD of the VL, VM and RF muscles.</abstract><cop>England</cop><pub>Blackwell Publishing Ltd</pub><pmid>24797398</pmid><doi>10.1111/cpf.12157</doi><tpages>5</tpages></addata></record> |
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| ispartof | Clinical physiology and functional imaging, 2015-07, Vol.35 (4), p.245-249 |
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| source | MEDLINE; Wiley Online Library All Journals |
| subjects | Adult Aged Aging - physiology ballistic elderly electromechanical delay Electromyography Excitation Contraction Coupling - physiology Female Humans Isometric Contraction - physiology Knee Joint - physiology Male Middle Aged Muscle, Skeletal - physiology peak torque Physical Endurance - physiology rate of torque development Reproducibility of Results Sensitivity and Specificity Torque Young Adult |
| title | Electromechanical delay of the knee extensor muscles: comparison among young, middle-age and older individuals |
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