The Influence of Myosin Heavy Chain Isoform Composition and Training Status on the Patterns of Responses for Mechanomyographic Amplitude versus Isometric Torque
The purpose of this study was to examine the influence of myosin heavy chain (MHC) isoform composition and training status on the mechanomyographic (MMG) amplitude versus isometric torque relationship for the vastus lateralis. Five resistance-trained (mean ± SD age = 23.2 ± 3.7 years), 5 aerobically...
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| Veröffentlicht in: | Journal of strength and conditioning research 2008-05, Vol.22 (3), p.818-825 |
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| container_title | Journal of strength and conditioning research |
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| creator | Beck, Travis W Housh, Terry J Fry, Andrew C Cramer, Joel T Weir, Joseph P Schilling, Brian K Falvo, Michael J Moore, Christopher A |
| description | The purpose of this study was to examine the influence of myosin heavy chain (MHC) isoform composition and training status on the mechanomyographic (MMG) amplitude versus isometric torque relationship for the vastus lateralis. Five resistance-trained (mean ± SD age = 23.2 ± 3.7 years), 5 aerobically trained (mean ± SD age = 32.6 ± 5.2 years), and 5 sedentary (mean ± SD age = 23.4 ± 4.1 years) men performed isometric muscle actions of the leg extensors in 20% increments from 20% to 100% of the maximum voluntary contraction. Biopsies from the vastus lateralis revealed that the MHC composition for the resistance-trained subjects was 59.0 ± 4.2% Type IIa, 0.1 ± 0.1% Type IIx, and 40.9 ± 4.3% Type I. The aerobically-trained subjects had 27.4 ± 7.8% Type IIa, 0.0 ± 0.0% Type IIx, and 72.6 ± 7.8% Type I MHC. The sedentary subjects had 42.1 ± 7.8% Type IIa, 17.8 ± 6.4% Type IIx, and 40.1 ± 10.9% Type I MHC. There were no consistent patterns of responses for the resistance-trained, aerobically trained, or sedentary subjects for MMG amplitude versus torque. Thus, differences in MHC isoform composition and training status did not explain the unique torque-related patterns for MMG amplitude. |
| doi_str_mv | 10.1519/JSC.0b013e3181660f3f |
| format | Article |
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Five resistance-trained (mean ± SD age = 23.2 ± 3.7 years), 5 aerobically trained (mean ± SD age = 32.6 ± 5.2 years), and 5 sedentary (mean ± SD age = 23.4 ± 4.1 years) men performed isometric muscle actions of the leg extensors in 20% increments from 20% to 100% of the maximum voluntary contraction. Biopsies from the vastus lateralis revealed that the MHC composition for the resistance-trained subjects was 59.0 ± 4.2% Type IIa, 0.1 ± 0.1% Type IIx, and 40.9 ± 4.3% Type I. The aerobically-trained subjects had 27.4 ± 7.8% Type IIa, 0.0 ± 0.0% Type IIx, and 72.6 ± 7.8% Type I MHC. The sedentary subjects had 42.1 ± 7.8% Type IIa, 17.8 ± 6.4% Type IIx, and 40.1 ± 10.9% Type I MHC. There were no consistent patterns of responses for the resistance-trained, aerobically trained, or sedentary subjects for MMG amplitude versus torque. Thus, differences in MHC isoform composition and training status did not explain the unique torque-related patterns for MMG amplitude.</description><identifier>ISSN: 1064-8011</identifier><identifier>EISSN: 1533-4287</identifier><identifier>DOI: 10.1519/JSC.0b013e3181660f3f</identifier><identifier>PMID: 18438235</identifier><language>eng</language><publisher>United States: National Strength and Conditioning Association</publisher><subject>Adult ; Anthropometry ; Biopsy, Needle ; Cohort Studies ; Electromyography - methods ; Humans ; Isometric Contraction - physiology ; Linear Models ; Male ; Muscle Fatigue ; Muscular system ; Myosin Heavy Chains - analysis ; Myosin Heavy Chains - metabolism ; Physical Education and Training - methods ; Physical Endurance ; Physical fitness ; Probability ; Quadriceps Muscle - metabolism ; Quadriceps Muscle - pathology ; Quadriceps Muscle - physiology ; Reference Values ; Sensitivity and Specificity ; Torque ; Training</subject><ispartof>Journal of strength and conditioning research, 2008-05, Vol.22 (3), p.818-825</ispartof><rights>2008 National Strength and Conditioning Association</rights><rights>Copyright Allen Press Publishing Services May 2008</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4234-8ada8e55238bf50e64c259559e425fa1235ff4d2d57f31342ddc64b9df7d1e3c3</citedby><cites>FETCH-LOGICAL-c4234-8ada8e55238bf50e64c259559e425fa1235ff4d2d57f31342ddc64b9df7d1e3c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/18438235$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Beck, Travis W</creatorcontrib><creatorcontrib>Housh, Terry J</creatorcontrib><creatorcontrib>Fry, Andrew C</creatorcontrib><creatorcontrib>Cramer, Joel T</creatorcontrib><creatorcontrib>Weir, Joseph P</creatorcontrib><creatorcontrib>Schilling, Brian K</creatorcontrib><creatorcontrib>Falvo, Michael J</creatorcontrib><creatorcontrib>Moore, Christopher A</creatorcontrib><title>The Influence of Myosin Heavy Chain Isoform Composition and Training Status on the Patterns of Responses for Mechanomyographic Amplitude versus Isometric Torque</title><title>Journal of strength and conditioning research</title><addtitle>J Strength Cond Res</addtitle><description>The purpose of this study was to examine the influence of myosin heavy chain (MHC) isoform composition and training status on the mechanomyographic (MMG) amplitude versus isometric torque relationship for the vastus lateralis. Five resistance-trained (mean ± SD age = 23.2 ± 3.7 years), 5 aerobically trained (mean ± SD age = 32.6 ± 5.2 years), and 5 sedentary (mean ± SD age = 23.4 ± 4.1 years) men performed isometric muscle actions of the leg extensors in 20% increments from 20% to 100% of the maximum voluntary contraction. Biopsies from the vastus lateralis revealed that the MHC composition for the resistance-trained subjects was 59.0 ± 4.2% Type IIa, 0.1 ± 0.1% Type IIx, and 40.9 ± 4.3% Type I. The aerobically-trained subjects had 27.4 ± 7.8% Type IIa, 0.0 ± 0.0% Type IIx, and 72.6 ± 7.8% Type I MHC. The sedentary subjects had 42.1 ± 7.8% Type IIa, 17.8 ± 6.4% Type IIx, and 40.1 ± 10.9% Type I MHC. There were no consistent patterns of responses for the resistance-trained, aerobically trained, or sedentary subjects for MMG amplitude versus torque. Thus, differences in MHC isoform composition and training status did not explain the unique torque-related patterns for MMG amplitude.</description><subject>Adult</subject><subject>Anthropometry</subject><subject>Biopsy, Needle</subject><subject>Cohort Studies</subject><subject>Electromyography - methods</subject><subject>Humans</subject><subject>Isometric Contraction - physiology</subject><subject>Linear Models</subject><subject>Male</subject><subject>Muscle Fatigue</subject><subject>Muscular system</subject><subject>Myosin Heavy Chains - analysis</subject><subject>Myosin Heavy Chains - metabolism</subject><subject>Physical Education and Training - methods</subject><subject>Physical Endurance</subject><subject>Physical fitness</subject><subject>Probability</subject><subject>Quadriceps Muscle - metabolism</subject><subject>Quadriceps Muscle - pathology</subject><subject>Quadriceps Muscle - physiology</subject><subject>Reference Values</subject><subject>Sensitivity and Specificity</subject><subject>Torque</subject><subject>Training</subject><issn>1064-8011</issn><issn>1533-4287</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>BENPR</sourceid><recordid>eNpdkc9u1DAQxiNERUvhDRCyOHBL6_GfxDlWEdBFrUB0OVveeNykJHawk1b7NjwqrrpSpR4sj2a--Y3HX1F8AHoGEprz7zftGd1R4MhBQVVRx92r4gQk56Vgqn6dY1qJUlGA4-JtSneUMiklf1McgxJcMS5Pin_bHsnGu3FF3yEJjlzvQxo8uURzvydtb3K8ScGFOJE2THMuLkPwxHhLtjFXB39LbhazrInk9JJxP82yYPTpkfYL0xx8wkQygVxj1xsfpn24jWbuh45cTPM4LKtFco8xZUaeNeESc2kb4t8V3xVHzowJ3x_u0-L31y_b9rK8-vFt015clZ1gPG9prFEoJeNq5yTFSnRMNlI2KJh0BvKyzgnLrKwdBy6YtV0ldo11tQXkHT8tPj9x5xjy2LToaUgdjqPxGNaka6iEUNBk4acXwruwRp_fphlwKmsFkEXiSdTFkFJEp-c4TCbuNVD9aJ_O9umX9uW2jwf2upvQPjcd_HrmPoQx_3H6M64PGHWPZlx6TSkwwWpVMkoVlZTSMh8m-H8z76lG</recordid><startdate>200805</startdate><enddate>200805</enddate><creator>Beck, Travis W</creator><creator>Housh, Terry J</creator><creator>Fry, Andrew C</creator><creator>Cramer, Joel T</creator><creator>Weir, Joseph P</creator><creator>Schilling, Brian K</creator><creator>Falvo, Michael J</creator><creator>Moore, Christopher A</creator><general>National Strength and Conditioning Association</general><general>Lippincott Williams & Wilkins Ovid Technologies</general><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>7RV</scope><scope>7TS</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>88I</scope><scope>8AO</scope><scope>8C1</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>K9.</scope><scope>KB0</scope><scope>LK8</scope><scope>M0R</scope><scope>M0S</scope><scope>M1P</scope><scope>M2P</scope><scope>M7P</scope><scope>NAPCQ</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope><scope>7X8</scope></search><sort><creationdate>200805</creationdate><title>The Influence of Myosin Heavy Chain Isoform Composition and Training Status on the Patterns of Responses for Mechanomyographic Amplitude versus Isometric Torque</title><author>Beck, Travis W ; Housh, Terry J ; Fry, Andrew C ; Cramer, Joel T ; Weir, Joseph P ; Schilling, Brian K ; Falvo, Michael J ; Moore, Christopher A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4234-8ada8e55238bf50e64c259559e425fa1235ff4d2d57f31342ddc64b9df7d1e3c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Adult</topic><topic>Anthropometry</topic><topic>Biopsy, Needle</topic><topic>Cohort Studies</topic><topic>Electromyography - methods</topic><topic>Humans</topic><topic>Isometric Contraction - physiology</topic><topic>Linear Models</topic><topic>Male</topic><topic>Muscle Fatigue</topic><topic>Muscular system</topic><topic>Myosin Heavy Chains - analysis</topic><topic>Myosin Heavy Chains - metabolism</topic><topic>Physical Education and Training - methods</topic><topic>Physical Endurance</topic><topic>Physical fitness</topic><topic>Probability</topic><topic>Quadriceps Muscle - metabolism</topic><topic>Quadriceps Muscle - pathology</topic><topic>Quadriceps Muscle - physiology</topic><topic>Reference Values</topic><topic>Sensitivity and Specificity</topic><topic>Torque</topic><topic>Training</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Beck, Travis W</creatorcontrib><creatorcontrib>Housh, Terry J</creatorcontrib><creatorcontrib>Fry, Andrew C</creatorcontrib><creatorcontrib>Cramer, Joel T</creatorcontrib><creatorcontrib>Weir, Joseph P</creatorcontrib><creatorcontrib>Schilling, Brian K</creatorcontrib><creatorcontrib>Falvo, Michael J</creatorcontrib><creatorcontrib>Moore, Christopher A</creatorcontrib><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>Nursing & Allied Health Database</collection><collection>Physical Education Index</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest Pharma Collection</collection><collection>ProQuest Public Health Database</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>Consumer Health Database (Alumni Edition)</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Nursing & Allied Health Database (Alumni Edition)</collection><collection>ProQuest Biological Science Collection</collection><collection>Consumer Health Database</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>Science Database</collection><collection>Biological Science Database</collection><collection>Nursing & Allied Health Premium</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 China</collection><collection>ProQuest Central Basic</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of strength and conditioning research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Beck, Travis W</au><au>Housh, Terry J</au><au>Fry, Andrew C</au><au>Cramer, Joel T</au><au>Weir, Joseph P</au><au>Schilling, Brian K</au><au>Falvo, Michael J</au><au>Moore, Christopher A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Influence of Myosin Heavy Chain Isoform Composition and Training Status on the Patterns of Responses for Mechanomyographic Amplitude versus Isometric Torque</atitle><jtitle>Journal of strength and conditioning research</jtitle><addtitle>J Strength Cond Res</addtitle><date>2008-05</date><risdate>2008</risdate><volume>22</volume><issue>3</issue><spage>818</spage><epage>825</epage><pages>818-825</pages><issn>1064-8011</issn><eissn>1533-4287</eissn><abstract>The purpose of this study was to examine the influence of myosin heavy chain (MHC) isoform composition and training status on the mechanomyographic (MMG) amplitude versus isometric torque relationship for the vastus lateralis. Five resistance-trained (mean ± SD age = 23.2 ± 3.7 years), 5 aerobically trained (mean ± SD age = 32.6 ± 5.2 years), and 5 sedentary (mean ± SD age = 23.4 ± 4.1 years) men performed isometric muscle actions of the leg extensors in 20% increments from 20% to 100% of the maximum voluntary contraction. Biopsies from the vastus lateralis revealed that the MHC composition for the resistance-trained subjects was 59.0 ± 4.2% Type IIa, 0.1 ± 0.1% Type IIx, and 40.9 ± 4.3% Type I. The aerobically-trained subjects had 27.4 ± 7.8% Type IIa, 0.0 ± 0.0% Type IIx, and 72.6 ± 7.8% Type I MHC. The sedentary subjects had 42.1 ± 7.8% Type IIa, 17.8 ± 6.4% Type IIx, and 40.1 ± 10.9% Type I MHC. There were no consistent patterns of responses for the resistance-trained, aerobically trained, or sedentary subjects for MMG amplitude versus torque. Thus, differences in MHC isoform composition and training status did not explain the unique torque-related patterns for MMG amplitude.</abstract><cop>United States</cop><pub>National Strength and Conditioning Association</pub><pmid>18438235</pmid><doi>10.1519/JSC.0b013e3181660f3f</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of strength and conditioning research, 2008-05, Vol.22 (3), p.818-825 |
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| source | MEDLINE; Journals@Ovid Complete |
| subjects | Adult Anthropometry Biopsy, Needle Cohort Studies Electromyography - methods Humans Isometric Contraction - physiology Linear Models Male Muscle Fatigue Muscular system Myosin Heavy Chains - analysis Myosin Heavy Chains - metabolism Physical Education and Training - methods Physical Endurance Physical fitness Probability Quadriceps Muscle - metabolism Quadriceps Muscle - pathology Quadriceps Muscle - physiology Reference Values Sensitivity and Specificity Torque Training |
| title | The Influence of Myosin Heavy Chain Isoform Composition and Training Status on the Patterns of Responses for Mechanomyographic Amplitude versus Isometric Torque |
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