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Sex Differences in Quadriceps Strength in OA
Abstract The purposes of this study were to determine 1) whether sex differences in quadriceps torque and isotonic power persist when controlling for muscle volume (i. e., torque/muscle volume and power/muscle volume) in participants with knee osteoarthritis (OA) and 2) the factors responsible for p...
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| Published in: | International journal of sports medicine 2012-11, Vol.33 (11), p.926-933 |
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| container_end_page | 933 |
| container_issue | 11 |
| container_start_page | 926 |
| container_title | International journal of sports medicine |
| container_volume | 33 |
| creator | Berger, M. J. McKenzie, C. A. Chess, D. G. Goela, A. Doherty, T. J. |
| description | Abstract
The purposes of this study were to determine 1) whether sex differences in quadriceps torque and isotonic power persist when controlling for muscle volume (i. e., torque/muscle volume and power/muscle volume) in participants with knee osteoarthritis (OA) and 2) the factors responsible for potential sex differences. Isometric torque, isotonic power (the product of torque and velocity, measured at 10, 20, 30, 40 and 50% maximal voluntary contraction; MVC) and maximal unloaded velocity were assessed in men (n=16, mean age=62.1±7.2) and women (n=17, mean age=60.4±4.3) with knee OA. Torque and power were normalized to muscle volume. The interpolated twitch technique was used to measure voluntary activation (VA) and evoked twitch and torque-frequency characteristics were measured to obtain information about muscle fibre distribution. Torque and power at all loads were significantly lower in women (p |
| doi_str_mv | 10.1055/s-0032-1311587 |
| format | article |
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The purposes of this study were to determine 1) whether sex differences in quadriceps torque and isotonic power persist when controlling for muscle volume (i. e., torque/muscle volume and power/muscle volume) in participants with knee osteoarthritis (OA) and 2) the factors responsible for potential sex differences. Isometric torque, isotonic power (the product of torque and velocity, measured at 10, 20, 30, 40 and 50% maximal voluntary contraction; MVC) and maximal unloaded velocity were assessed in men (n=16, mean age=62.1±7.2) and women (n=17, mean age=60.4±4.3) with knee OA. Torque and power were normalized to muscle volume. The interpolated twitch technique was used to measure voluntary activation (VA) and evoked twitch and torque-frequency characteristics were measured to obtain information about muscle fibre distribution. Torque and power at all loads were significantly lower in women (p<0.05). Sex differences in power were reduced by 50% when controlling for muscle volume but were still significant at 10–40% MVC (p<0.05). No differences in VA, torque-frequency properties or time-to-peak tension of the evoked twitch were observed (p>0.05). These results suggest that only minor sex differences in torque and power persist when controlling for muscle volume. As VA and contractile property differences were not observed, other factors seem to be responsible.</description><identifier>ISSN: 0172-4622</identifier><identifier>EISSN: 1439-3964</identifier><identifier>DOI: 10.1055/s-0032-1311587</identifier><identifier>PMID: 22706942</identifier><identifier>CODEN: IJSMDA</identifier><language>eng</language><publisher>Stuttgart · New York: Georg Thieme Verlag KG</publisher><subject>Aged ; Biological and medical sciences ; Female ; Force ; Fundamental and applied biological sciences. Psychology ; Humans ; Isometric Contraction - physiology ; Isotonics ; Knees ; Male ; Measurement ; Middle Aged ; Muscle Fibers, Skeletal - metabolism ; Muscle Strength - physiology ; Muscles (size) ; Orthopedics & Biomechanics ; Osteoarthritis, Knee - physiopathology ; Power ; Quadriceps Muscle - physiology ; Sex differences ; Sex Factors ; Torque ; Velocity ; Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports ; Women</subject><ispartof>International journal of sports medicine, 2012-11, Vol.33 (11), p.926-933</ispartof><rights>2015 INIST-CNRS</rights><rights>Georg Thieme Verlag KG Stuttgart · New York.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c396t-3d4bf7bc9c76763a784d9f9566ceea20c778a8c03b075c7efd77d3ddeb572353</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.thieme-connect.de/products/ejournals/pdf/10.1055/s-0032-1311587.pdf$$EPDF$$P50$$Gthieme$$H</linktopdf><linktohtml>$$Uhttps://www.thieme-connect.de/products/ejournals/html/10.1055/s-0032-1311587$$EHTML$$P50$$Gthieme$$H</linktohtml><link.rule.ids>314,780,784,3017,3018,27924,27925,54559,54560</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=26470727$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22706942$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Berger, M. J.</creatorcontrib><creatorcontrib>McKenzie, C. A.</creatorcontrib><creatorcontrib>Chess, D. G.</creatorcontrib><creatorcontrib>Goela, A.</creatorcontrib><creatorcontrib>Doherty, T. J.</creatorcontrib><title>Sex Differences in Quadriceps Strength in OA</title><title>International journal of sports medicine</title><addtitle>Int J Sports Med</addtitle><description>Abstract
The purposes of this study were to determine 1) whether sex differences in quadriceps torque and isotonic power persist when controlling for muscle volume (i. e., torque/muscle volume and power/muscle volume) in participants with knee osteoarthritis (OA) and 2) the factors responsible for potential sex differences. Isometric torque, isotonic power (the product of torque and velocity, measured at 10, 20, 30, 40 and 50% maximal voluntary contraction; MVC) and maximal unloaded velocity were assessed in men (n=16, mean age=62.1±7.2) and women (n=17, mean age=60.4±4.3) with knee OA. Torque and power were normalized to muscle volume. The interpolated twitch technique was used to measure voluntary activation (VA) and evoked twitch and torque-frequency characteristics were measured to obtain information about muscle fibre distribution. Torque and power at all loads were significantly lower in women (p<0.05). Sex differences in power were reduced by 50% when controlling for muscle volume but were still significant at 10–40% MVC (p<0.05). No differences in VA, torque-frequency properties or time-to-peak tension of the evoked twitch were observed (p>0.05). These results suggest that only minor sex differences in torque and power persist when controlling for muscle volume. As VA and contractile property differences were not observed, other factors seem to be responsible.</description><subject>Aged</subject><subject>Biological and medical sciences</subject><subject>Female</subject><subject>Force</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Humans</subject><subject>Isometric Contraction - physiology</subject><subject>Isotonics</subject><subject>Knees</subject><subject>Male</subject><subject>Measurement</subject><subject>Middle Aged</subject><subject>Muscle Fibers, Skeletal - metabolism</subject><subject>Muscle Strength - physiology</subject><subject>Muscles (size)</subject><subject>Orthopedics & Biomechanics</subject><subject>Osteoarthritis, Knee - physiopathology</subject><subject>Power</subject><subject>Quadriceps Muscle - physiology</subject><subject>Sex differences</subject><subject>Sex Factors</subject><subject>Torque</subject><subject>Velocity</subject><subject>Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports</subject><subject>Women</subject><issn>0172-4622</issn><issn>1439-3964</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqNkEtLw0AUhQdRbK1uXUo3ggtT55HJzSxLfUKhSLsfJpMbm5JHnUlA_70JjboSXF04fPcc-Ai5ZHTGqJR3PqBU8IAJxmQMR2TMQqECoaLwmIwpAx6EEecjcub9jlIWKiZOyYhzoJEK-ZjcrvFjep9nGTqsLPppXk1fW5O63OLeT9dNF7812z5ezc_JSWYKjxfDnZDN48Nm8RwsV08vi_kysN1wE4g0TDJIrLIQQSQMxGGqMiWjyCIaTi1AbGJLRUJBWsAsBUhFmmIigQspJuTmULt39XuLvtFl7i0Whamwbr1mXMSMKZD8PyjQWHKmOnR2QK2rvXeY6b3LS-M-NaO6d6m97l3qwWX3cDV0t0mJ6Q_-La8DrgfAeGuKzJnK5v6Xi0KgwPui4MA12xxL1Lu6dVXn76_hL7VTh0k</recordid><startdate>20121101</startdate><enddate>20121101</enddate><creator>Berger, M. J.</creator><creator>McKenzie, C. A.</creator><creator>Chess, D. G.</creator><creator>Goela, A.</creator><creator>Doherty, T. J.</creator><general>Georg Thieme Verlag KG</general><general>Thieme</general><scope>IQODW</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>7X8</scope><scope>7TS</scope></search><sort><creationdate>20121101</creationdate><title>Sex Differences in Quadriceps Strength in OA</title><author>Berger, M. J. ; McKenzie, C. A. ; Chess, D. G. ; Goela, A. ; Doherty, T. J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c396t-3d4bf7bc9c76763a784d9f9566ceea20c778a8c03b075c7efd77d3ddeb572353</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Aged</topic><topic>Biological and medical sciences</topic><topic>Female</topic><topic>Force</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Humans</topic><topic>Isometric Contraction - physiology</topic><topic>Isotonics</topic><topic>Knees</topic><topic>Male</topic><topic>Measurement</topic><topic>Middle Aged</topic><topic>Muscle Fibers, Skeletal - metabolism</topic><topic>Muscle Strength - physiology</topic><topic>Muscles (size)</topic><topic>Orthopedics & Biomechanics</topic><topic>Osteoarthritis, Knee - physiopathology</topic><topic>Power</topic><topic>Quadriceps Muscle - physiology</topic><topic>Sex differences</topic><topic>Sex Factors</topic><topic>Torque</topic><topic>Velocity</topic><topic>Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports</topic><topic>Women</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Berger, M. J.</creatorcontrib><creatorcontrib>McKenzie, C. A.</creatorcontrib><creatorcontrib>Chess, D. G.</creatorcontrib><creatorcontrib>Goela, A.</creatorcontrib><creatorcontrib>Doherty, T. J.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Physical Education Index</collection><jtitle>International journal of sports medicine</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Berger, M. J.</au><au>McKenzie, C. A.</au><au>Chess, D. G.</au><au>Goela, A.</au><au>Doherty, T. J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sex Differences in Quadriceps Strength in OA</atitle><jtitle>International journal of sports medicine</jtitle><addtitle>Int J Sports Med</addtitle><date>2012-11-01</date><risdate>2012</risdate><volume>33</volume><issue>11</issue><spage>926</spage><epage>933</epage><pages>926-933</pages><issn>0172-4622</issn><eissn>1439-3964</eissn><coden>IJSMDA</coden><abstract>Abstract
The purposes of this study were to determine 1) whether sex differences in quadriceps torque and isotonic power persist when controlling for muscle volume (i. e., torque/muscle volume and power/muscle volume) in participants with knee osteoarthritis (OA) and 2) the factors responsible for potential sex differences. Isometric torque, isotonic power (the product of torque and velocity, measured at 10, 20, 30, 40 and 50% maximal voluntary contraction; MVC) and maximal unloaded velocity were assessed in men (n=16, mean age=62.1±7.2) and women (n=17, mean age=60.4±4.3) with knee OA. Torque and power were normalized to muscle volume. The interpolated twitch technique was used to measure voluntary activation (VA) and evoked twitch and torque-frequency characteristics were measured to obtain information about muscle fibre distribution. Torque and power at all loads were significantly lower in women (p<0.05). Sex differences in power were reduced by 50% when controlling for muscle volume but were still significant at 10–40% MVC (p<0.05). No differences in VA, torque-frequency properties or time-to-peak tension of the evoked twitch were observed (p>0.05). These results suggest that only minor sex differences in torque and power persist when controlling for muscle volume. As VA and contractile property differences were not observed, other factors seem to be responsible.</abstract><cop>Stuttgart · New York</cop><pub>Georg Thieme Verlag KG</pub><pmid>22706942</pmid><doi>10.1055/s-0032-1311587</doi><tpages>8</tpages></addata></record> |
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| subjects | Aged Biological and medical sciences Female Force Fundamental and applied biological sciences. Psychology Humans Isometric Contraction - physiology Isotonics Knees Male Measurement Middle Aged Muscle Fibers, Skeletal - metabolism Muscle Strength - physiology Muscles (size) Orthopedics & Biomechanics Osteoarthritis, Knee - physiopathology Power Quadriceps Muscle - physiology Sex differences Sex Factors Torque Velocity Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports Women |
| title | Sex Differences in Quadriceps Strength in OA |
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