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Skelettmuskel – Wikipedia
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skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject mw-editable page-Skelettmuskel rootpage-Skelettmuskel skin-vector-2022 action-view"><a class="mw-jump-link" href="#bodyContent">Hoppa till innehållet</a> <div class="vector-header-container"> <header class="vector-header mw-header"> <div class="vector-header-start"> <nav class="vector-main-menu-landmark" aria-label="Webbplats"> <div id="vector-main-menu-dropdown" class="vector-dropdown vector-main-menu-dropdown vector-button-flush-left vector-button-flush-right" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Huvudmeny" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet 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vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">dölj</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navigering </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Portal:Huvudsida" title="Besök huvudsidan [z]" accesskey="z"><span>Huvudsida</span></a></li><li id="n-Introduktion" class="mw-list-item"><a href="/wiki/Wikipedia:Introduktion"><span>Introduktion</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikipedia:Deltagarportalen" title="Om projektet, vad du kan göra, var man kan hitta saker"><span>Deltagarportalen</span></a></li><li id="n-Bybrunnen" class="mw-list-item"><a href="/wiki/Wikipedia:Bybrunnen"><span>Bybrunnen</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Special:Senaste_%C3%A4ndringar" title="Lista över de 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class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Utseende"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Ändra utseendet på sidans teckenstorlek, bredd och färg" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Utseende" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Utseende</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_sv.wikipedia.org&uselang=sv" class=""><span>Stöd Wikipedia</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item 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[o]" accesskey="o" class=""><span>Logga in</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Fler alternativ" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Personliga verktyg" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personliga verktyg</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Användarmeny" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_sv.wikipedia.org&uselang=sv"><span>Stöd Wikipedia</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:Skapa_konto&returnto=Skelettmuskel" title="Du uppmuntras att skapa ett konto och logga in, men det är inte obligatoriskt"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Skapa konto</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:Inloggning&returnto=Skelettmuskel" title="Inloggning ger tillgång till fler funktioner för den som vill skriva och redigera artiklar. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Logga in</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Sidor för utloggade redigerare <a href="/wiki/Hj%C3%A4lp:Introduktion" aria-label="Läs mer om redigering"><span>läs mer</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:Mina_bidrag" title="En lista över redigeringar från denna IP-adress [y]" accesskey="y"><span>Bidrag</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:Min_diskussion" title="Diskussion om redigeringar från det här IP-numret [n]" accesskey="n"><span>Diskussion</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"><!-- CentralNotice --></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Webbplats"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Innehåll" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Innehåll</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">flytta till sidofältet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">dölj</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inledning</div> </a> </li> <li id="toc-Beskrivning" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Beskrivning"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Beskrivning</span> </div> </a> <button aria-controls="toc-Beskrivning-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Växla underavsnittet Beskrivning</span> </button> <ul id="toc-Beskrivning-sublist" class="vector-toc-list"> <li id="toc-Motorisk_enhet" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Motorisk_enhet"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>Motorisk enhet</span> </div> </a> <ul id="toc-Motorisk_enhet-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Fibertyper" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Fibertyper"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>Fibertyper</span> </div> </a> <ul id="toc-Fibertyper-sublist" class="vector-toc-list"> <li id="toc-Karaktärsbeskrivning" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Karaktärsbeskrivning"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2.1</span> <span>Karaktärsbeskrivning</span> </div> </a> <ul id="toc-Karaktärsbeskrivning-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Typ_I-fiberträning" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Typ_I-fiberträning"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2.2</span> <span>Typ I-fiberträning</span> </div> </a> <ul id="toc-Typ_I-fiberträning-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Typ_II-fiberträning" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Typ_II-fiberträning"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2.3</span> <span>Typ II-fiberträning</span> </div> </a> <ul id="toc-Typ_II-fiberträning-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> </ul> </li> <li id="toc-Muskelns_kraft_och_styrka" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Muskelns_kraft_och_styrka"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Muskelns kraft och styrka</span> </div> </a> <ul id="toc-Muskelns_kraft_och_styrka-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Externa_länkar" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Externa_länkar"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Externa länkar</span> </div> </a> <ul id="toc-Externa_länkar-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Innehåll" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Växla innehållsförteckningen" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Växla innehållsförteckningen</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Skelettmuskel</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Gå till en artikel på ett annat språk. Tillgänglig på 51 språk" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-51" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">51 språk</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B9%D8%B6%D9%84%D8%A9_%D9%87%D9%8A%D9%83%D9%84%D9%8A%D8%A9" title="عضلة هيكلية – arabiska" lang="ar" hreflang="ar" data-title="عضلة هيكلية" data-language-autonym="العربية" data-language-local-name="arabiska" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/M%C3%BAsculu_esquel%C3%A9ticu" title="Músculu esqueléticu – asturiska" lang="ast" hreflang="ast" data-title="Músculu esqueléticu" data-language-autonym="Asturianu" data-language-local-name="asturiska" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Enin%C9%99_zolaql%C4%B1_%C9%99z%C9%99l%C9%99" title="Eninə zolaqlı əzələ – azerbajdzjanska" lang="az" hreflang="az" data-title="Eninə zolaqlı əzələ" data-language-autonym="Azərbaycanca" data-language-local-name="azerbajdzjanska" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%90%E0%A6%9A%E0%A7%8D%E0%A6%9B%E0%A6%BF%E0%A6%95_%E0%A6%AA%E0%A7%87%E0%A6%B6%E0%A7%80" title="ঐচ্ছিক পেশী – bengali" lang="bn" hreflang="bn" data-title="ঐচ্ছিক পেশী" data-language-autonym="বাংলা" data-language-local-name="bengali" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%90%D1%80%D2%A1%D1%8B%D1%80%D1%8B_%D2%BB%D1%8B%D2%99%D0%B0%D1%82%D0%BB%D1%8B_%D0%BC%D1%83%D1%81%D0%BA%D1%83%D0%BB_%D1%82%D1%83%D2%A1%D1%8B%D0%BC%D0%B0%D2%BB%D1%8B" title="Арҡыры һыҙатлы мускул туҡымаһы – basjkiriska" lang="ba" hreflang="ba" data-title="Арҡыры һыҙатлы мускул туҡымаһы" data-language-autonym="Башҡортса" data-language-local-name="basjkiriska" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Skeletni_mi%C5%A1i%C4%87" title="Skeletni mišić – bosniska" lang="bs" hreflang="bs" data-title="Skeletni mišić" data-language-autonym="Bosanski" data-language-local-name="bosniska" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/M%C3%BAscul_esquel%C3%A8tic" title="Múscul esquelètic – katalanska" lang="ca" hreflang="ca" data-title="Múscul esquelètic" data-language-autonym="Català" data-language-local-name="katalanska" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/P%C5%99%C3%AD%C4%8Dn%C4%9B_pruhovan%C3%A1_svalovina" title="Příčně pruhovaná svalovina – tjeckiska" lang="cs" hreflang="cs" data-title="Příčně pruhovaná svalovina" data-language-autonym="Čeština" data-language-local-name="tjeckiska" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Skeletmuskulatur" title="Skeletmuskulatur – danska" lang="da" hreflang="da" data-title="Skeletmuskulatur" data-language-autonym="Dansk" data-language-local-name="danska" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Skelettmuskel" title="Skelettmuskel – tyska" lang="de" hreflang="de" data-title="Skelettmuskel" data-language-autonym="Deutsch" data-language-local-name="tyska" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-dv mw-list-item"><a href="https://dv.wikipedia.org/wiki/%DE%86%DE%A6%DE%81%DE%A8_%DE%89%DE%A6%DE%90%DE%B0" title="ކަށި މަސް – divehi" lang="dv" hreflang="dv" data-title="ކަށި މަސް" data-language-autonym="ދިވެހިބަސް" data-language-local-name="divehi" class="interlanguage-link-target"><span>ދިވެހިބަސް</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Skeletilihased" title="Skeletilihased – estniska" lang="et" hreflang="et" data-title="Skeletilihased" data-language-autonym="Eesti" data-language-local-name="estniska" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Skeletal_muscle" title="Skeletal muscle – engelska" lang="en" hreflang="en" data-title="Skeletal muscle" data-language-autonym="English" data-language-local-name="engelska" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/M%C3%BAsculo_esquel%C3%A9tico" title="Músculo esquelético – spanska" lang="es" hreflang="es" data-title="Músculo esquelético" data-language-autonym="Español" data-language-local-name="spanska" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Skeleta_muskolo" title="Skeleta muskolo – esperanto" lang="eo" hreflang="eo" data-title="Skeleta muskolo" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Muskulu_eskeletiko" title="Muskulu eskeletiko – baskiska" lang="eu" hreflang="eu" data-title="Muskulu eskeletiko" data-language-autonym="Euskara" data-language-local-name="baskiska" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%85%D8%A7%D9%87%DB%8C%DA%86%D9%87_%D8%A7%D8%B3%DA%A9%D9%84%D8%AA%DB%8C" title="ماهیچه اسکلتی – persiska" lang="fa" hreflang="fa" data-title="ماهیچه اسکلتی" data-language-autonym="فارسی" data-language-local-name="persiska" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Muscle_stri%C3%A9" title="Muscle strié – franska" lang="fr" hreflang="fr" data-title="Muscle strié" data-language-autonym="Français" data-language-local-name="franska" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/M%C3%BAsculo_esquel%C3%A9tico" title="Músculo esquelético – galiciska" lang="gl" hreflang="gl" data-title="Músculo esquelético" data-language-autonym="Galego" data-language-local-name="galiciska" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%BC%88%EB%8C%80%EA%B7%BC%EC%9C%A1" title="뼈대근육 – koreanska" lang="ko" hreflang="ko" data-title="뼈대근육" data-language-autonym="한국어" data-language-local-name="koreanska" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%95%E0%A4%82%E0%A4%95%E0%A4%BE%E0%A4%B2_%E0%A4%AA%E0%A5%87%E0%A4%B6%E0%A5%80" title="कंकाल पेशी – hindi" lang="hi" hreflang="hi" data-title="कंकाल पेशी" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Popre%C4%8Dno-prugasti_mi%C5%A1i%C4%87" title="Poprečno-prugasti mišić – kroatiska" lang="hr" hreflang="hr" data-title="Poprečno-prugasti mišić" data-language-autonym="Hrvatski" data-language-local-name="kroatiska" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-ig mw-list-item"><a href="https://ig.wikipedia.org/wiki/Muscle" title="Muscle – igbo" lang="ig" hreflang="ig" data-title="Muscle" data-language-autonym="Igbo" data-language-local-name="igbo" class="interlanguage-link-target"><span>Igbo</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Otot_lurik" title="Otot lurik – indonesiska" lang="id" hreflang="id" data-title="Otot lurik" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiska" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Misk_eskeletik" title="Misk eskeletik – haitiska" lang="ht" hreflang="ht" data-title="Misk eskeletik" data-language-autonym="Kreyòl ayisyen" data-language-local-name="haitiska" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Peykeremas%C3%BBlke" title="Peykeremasûlke – kurdiska" lang="ku" hreflang="ku" data-title="Peykeremasûlke" data-language-autonym="Kurdî" data-language-local-name="kurdiska" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Skeleta_%C5%A1%C4%B7%C4%93rssv%C4%ABtrot%C4%81_muskulat%C5%ABra" title="Skeleta šķērssvītrotā muskulatūra – lettiska" lang="lv" hreflang="lv" data-title="Skeleta šķērssvītrotā muskulatūra" data-language-autonym="Latviešu" data-language-local-name="lettiska" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Skersaruo%C5%BEis_raumeninis_audinys" title="Skersaruožis raumeninis audinys – litauiska" lang="lt" hreflang="lt" data-title="Skersaruožis raumeninis audinys" data-language-autonym="Lietuvių" data-language-local-name="litauiska" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%85%E0%B4%B8%E0%B5%8D%E0%B4%A5%E0%B4%BF%E0%B4%AA%E0%B5%87%E0%B4%B6%E0%B4%BF" title="അസ്ഥിപേശി – malayalam" lang="ml" hreflang="ml" data-title="അസ്ഥിപേശി" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Otot_rangka" title="Otot rangka – malajiska" lang="ms" hreflang="ms" data-title="Otot rangka" data-language-autonym="Bahasa Melayu" data-language-local-name="malajiska" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Skeletspier" title="Skeletspier – nederländska" lang="nl" hreflang="nl" data-title="Skeletspier" data-language-autonym="Nederlands" data-language-local-name="nederländska" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E9%AA%A8%E6%A0%BC%E7%AD%8B" title="骨格筋 – japanska" lang="ja" hreflang="ja" data-title="骨格筋" data-language-autonym="日本語" data-language-local-name="japanska" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Skjelettmuskulatur" title="Skjelettmuskulatur – norskt bokmål" lang="nb" hreflang="nb" data-title="Skjelettmuskulatur" data-language-autonym="Norsk bokmål" data-language-local-name="norskt bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Muscle_esqueletic" title="Muscle esqueletic – occitanska" lang="oc" hreflang="oc" data-title="Muscle esqueletic" data-language-autonym="Occitan" data-language-local-name="occitanska" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Mi%C4%99sie%C5%84_poprzecznie_pr%C4%85%C5%BCkowany" title="Mięsień poprzecznie prążkowany – polska" lang="pl" hreflang="pl" data-title="Mięsień poprzecznie prążkowany" data-language-autonym="Polski" data-language-local-name="polska" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt badge-Q70893996 mw-list-item" title=""><a href="https://pt.wikipedia.org/wiki/M%C3%BAsculo_esquel%C3%A9tico" title="Músculo esquelético – portugisiska" lang="pt" hreflang="pt" data-title="Músculo esquelético" data-language-autonym="Português" data-language-local-name="portugisiska" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A1%D0%BA%D0%B5%D0%BB%D0%B5%D1%82%D0%BD%D0%B0%D1%8F_%D0%BC%D1%8B%D1%88%D0%B5%D1%87%D0%BD%D0%B0%D1%8F_%D1%82%D0%BA%D0%B0%D0%BD%D1%8C" title="Скелетная мышечная ткань – ryska" lang="ru" hreflang="ru" data-title="Скелетная мышечная ткань" data-language-autonym="Русский" data-language-local-name="ryska" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Skeletal_muscle" title="Skeletal muscle – Simple English" lang="en-simple" hreflang="en-simple" data-title="Skeletal muscle" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Prie%C4%8Dne_pruhovan%C3%A1_svalovina" title="Priečne pruhovaná svalovina – slovakiska" lang="sk" hreflang="sk" data-title="Priečne pruhovaná svalovina" data-language-autonym="Slovenčina" data-language-local-name="slovakiska" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Skeletna_mi%C5%A1ica" title="Skeletna mišica – slovenska" lang="sl" hreflang="sl" data-title="Skeletna mišica" data-language-autonym="Slovenščina" data-language-local-name="slovenska" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D9%85%D8%A7%D8%B3%D9%88%D9%88%D9%84%DA%A9%DB%95%DB%8C_%D8%A6%DB%8E%D8%B3%DA%A9%D8%A8%DB%95%D9%86%D8%AF%DB%8C" title="ماسوولکەی ئێسکبەندی – centralkurdiska" lang="ckb" hreflang="ckb" data-title="ماسوولکەی ئێسکبەندی" data-language-autonym="کوردی" data-language-local-name="centralkurdiska" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9F%D0%BE%D0%BF%D1%80%D0%B5%D1%87%D0%BD%D0%BE-%D0%BF%D1%80%D1%83%D0%B3%D0%B0%D1%81%D1%82%D0%B8_%D0%BC%D0%B8%D1%88%D0%B8%D1%9B" title="Попречно-пругасти мишић – serbiska" lang="sr" hreflang="sr" data-title="Попречно-пругасти мишић" data-language-autonym="Српски / srpski" data-language-local-name="serbiska" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Popre%C4%8Dno-prugasti_mi%C5%A1i%C4%87" title="Poprečno-prugasti mišić – serbokroatiska" lang="sh" hreflang="sh" data-title="Poprečno-prugasti mišić" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbokroatiska" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Luurankolihas" title="Luurankolihas – finska" lang="fi" hreflang="fi" data-title="Luurankolihas" data-language-autonym="Suomi" data-language-local-name="finska" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%8E%E0%AE%B2%E0%AF%81%E0%AE%AE%E0%AF%8D%E0%AE%AA%E0%AF%81%E0%AE%A4%E0%AF%8D%E0%AE%A4%E0%AE%9A%E0%AF%88" title="எலும்புத்தசை – tamil" lang="ta" hreflang="ta" data-title="எலும்புத்தசை" data-language-autonym="தமிழ்" data-language-local-name="tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%81%E0%B8%A5%E0%B9%89%E0%B8%B2%E0%B8%A1%E0%B9%80%E0%B8%99%E0%B8%B7%E0%B9%89%E0%B8%AD%E0%B9%82%E0%B8%84%E0%B8%A3%E0%B8%87%E0%B8%A3%E0%B9%88%E0%B8%B2%E0%B8%87" title="กล้ามเนื้อโครงร่าง – thailändska" lang="th" hreflang="th" data-title="กล้ามเนื้อโครงร่าง" data-language-autonym="ไทย" data-language-local-name="thailändska" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/%C4%B0skelet_kas%C4%B1" title="İskelet kası – turkiska" lang="tr" hreflang="tr" data-title="İskelet kası" data-language-autonym="Türkçe" data-language-local-name="turkiska" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A1%D0%BA%D0%B5%D0%BB%D0%B5%D1%82%D0%BD%D1%96_%D0%BC%27%D1%8F%D0%B7%D0%B8" title="Скелетні м'язи – ukrainska" lang="uk" hreflang="uk" data-title="Скелетні м'язи" data-language-autonym="Українська" data-language-local-name="ukrainska" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a 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class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Sidverktyg"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Utseende"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Utseende</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">flytta till sidofältet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">dölj</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Från Wikipedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="sv" dir="ltr"><figure typeof="mw:File/Thumb"><a href="/wiki/Fil:Skeletal_muscle.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c0/Skeletal_muscle.jpg/330px-Skeletal_muscle.jpg" decoding="async" width="330" height="252" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c0/Skeletal_muscle.jpg/495px-Skeletal_muscle.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c0/Skeletal_muscle.jpg/660px-Skeletal_muscle.jpg 2x" data-file-width="1303" data-file-height="996" /></a><figcaption>En muskel som steg för steg delas upp i olika strukturer, ner till den minsta beståndsdelen.</figcaption></figure> <figure typeof="mw:File/Thumb"><a href="/wiki/Fil:Muskelstruktur.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Muskelstruktur.png/330px-Muskelstruktur.png" decoding="async" width="330" height="182" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Muskelstruktur.png/495px-Muskelstruktur.png 1.5x, //upload.wikimedia.org/wikipedia/commons/7/73/Muskelstruktur.png 2x" data-file-width="520" data-file-height="286" /></a><figcaption>En illustration över hur en skelettmuskel är uppbyggd strukturellt.</figcaption></figure> <p><b>Tvärstrimmig skelettmuskulatur</b> är den vanligaste typen av <a href="/wiki/Muskel" title="Muskel">muskel</a> i vår kropp och de flesta <a href="/wiki/Ryggradsdjur" title="Ryggradsdjur">ryggradsdjur</a>. Den är viljestyrd och det finns cirka 640 skelettmuskler i människokroppen, varav den största heter <a href="/wiki/Gluteus_maximus" title="Gluteus maximus">gluteus maximus</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Beskrivning">Beskrivning</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Skelettmuskel&veaction=edit&section=1" title="Redigera avsnitt: Beskrivning" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Skelettmuskel&action=edit&section=1" title="Redigera avsnitts källkod: Beskrivning"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Varje separat muskel innehåller ett antal muskelbuntar. Runt dessa finns det ett bindvävslager (muskel-fascia). Detta har till uppgift att skapa ett glidlager mot andra muskler och på det sättet ge muskeln form. Varje muskelbunt innehåller i sin tur ett visst antal muskelceller (myon). Dessa kallas även muskelfibrer. En muskelcell är uppbyggd av mindre komponenter: muskelfibriller. Muskelfibriller ligger vid sidan om varandra och är tvärrandiga i normalt mikroskop. Detta beror på att fibrillerna är uppbyggda av mindre komponenter, myofilament, som i sin tur består av två typer: aktin och myosin' filament. När muskeln förkortas (kontraheras) dras aktinet in mellan myosinet. Följden av detta är att fibrillerna förkortas samt förtjockas, vilket i sin tur leder till att de elastiska trådarna runt muskelcellen och bindvävslagret (som omger muskeln och har sin förlängning ut i muskelns sena) ger upphov till en kraft som påverkar muskelns fäste och ursprung, så att rörelser uppstår i <a href="/wiki/Skelett" title="Skelett">skelettet</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Motorisk_enhet">Motorisk enhet</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Skelettmuskel&veaction=edit&section=2" title="Redigera avsnitt: Motorisk enhet" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Skelettmuskel&action=edit&section=2" title="Redigera avsnitts källkod: Motorisk enhet"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>För att muskeln överhuvudtaget skall kunna utföra en kontraktion måste en signal från <a href="/wiki/Hj%C3%A4rna" title="Hjärna">hjärnan</a> skickas via <a href="/wiki/Ryggm%C3%A4rg" title="Ryggmärg">ryggmärgens</a> <a href="/wiki/Nervcell" title="Nervcell">nervceller</a> och ner till en nervtråd som i sin tur förgrenar sig och når ner till muskelceller. Den här funktionella enheten kallas "motorisk enhet" och består av en nervcell med alla muskelceller som den innerverar. Om få celler ingår i varje motorisk enheter kallas den muskeln finmotorisk och om många celler ingår i varje motorisk enhet kallas den muskeln grovmotorisk'. När en motorisk enhet sätts i arbete, kontraherar sig samtliga celler i den enheten med maximal kraft. Det är alltid samma muskler som arbetar vid lätt belastning och det är alltid samma enheter som därefter kopplas in om belastningen ökar. Muskeln skyddas av nervceller som består av två olika typer, <a href="/wiki/Muskelspole" title="Muskelspole">muskelspolar</a> och <a href="/wiki/Senspole" class="mw-redirect" title="Senspole">senspolar</a>. Dessa sitter parallellkopplade mellan muskelcellerna och följer passivt med de närliggande muskelcellernas rörelse. Om muskelcellerna töjs så töjs även muskelspolen. Om muskelns töjs för mycket och det finns risk för att den skall brista, sänder muskelspolen en kontraktionsignal till det <a href="/wiki/Centrala_nervsystemet" title="Centrala nervsystemet">centrala nervsystemet</a>, som i sin tur skickar tillbaka en signal som gör att muskeln drar ihop sig och hindrar att en skada uppkommer. Denna skyddsmekanism kallas för sträckreflex. I övergången mellan muskelceller och senvävnad sitter senspolarna. Denna ger i motsats till muskelspolarna en signal som gör att muskeln slutar att kontraheras och en skada i <a href="/wiki/Sena" title="Sena">senan</a> kan undvikas. </p> <div class="mw-heading mw-heading3"><h3 id="Fibertyper">Fibertyper</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Skelettmuskel&veaction=edit&section=3" title="Redigera avsnitt: Fibertyper" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Skelettmuskel&action=edit&section=3" title="Redigera avsnitts källkod: Fibertyper"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Man vet idag att det finns två olika fibertyper: den långsamma (<i>Typ I</i>) och den snabba (<i>Typ II</i>). Beteckningen långsam innebär inte att den hindrar muskeln från att utföra en, för <a href="/wiki/Idrott" title="Idrott">idrotten</a>, snabb rörelse. I dessa sammanhang är exempelvis en <a href="/wiki/Tennis" title="Tennis">tennis</a>-smash mycket långsam. De långsamma får sin <a href="/wiki/Energif%C3%B6rs%C3%B6rjning" title="Energiförsörjning">energiförsörjning</a> via <a href="/wiki/Syre" title="Syre">syre</a> från <a href="/wiki/Blod" title="Blod">blodet</a>. De snabba får i huvudsak sin energi från i muskeln lagrad <a href="/wiki/Energi" title="Energi">energi</a> (<a href="/wiki/Glukos" title="Glukos">glukos</a>). Typ II-fibrerna delas senare in i tre olika underavdelningar: <i>typ IIa</i>, <i>typ IIx</i> och <i>typ IIc</i>. </p> <ul><li>Typ IIa: Har de bästa egenskaperna hos var och en av de andra typerna, det vill säga hög styrka och god uthållighet.</li> <li>Typ IIx: Är den mest explosiva med mycket dålig uthållighet.</li> <li>Typ IIc: Forskare har under senare år försökt beskriva hur olika muskelceller förändras under olika träningsmetoder.</li></ul> <p>Det är känt att typ I-fibrer styrs av en viss typ av <a href="/wiki/Nervcell" title="Nervcell">nervceller</a> (liten) och typ II-fibrer av en annan (stor), och nervceller förändras inte. Forskarna tror emellertid att efter mycket långvarig uthållighetsträning kan muskelfiber av typ II lära sig att använda syre som energi, och kallas då typ IIc. </p> <div class="mw-heading mw-heading4"><h4 id="Karaktärsbeskrivning"><span id="Karakt.C3.A4rsbeskrivning"></span>Karaktärsbeskrivning</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Skelettmuskel&veaction=edit&section=4" title="Redigera avsnitt: Karaktärsbeskrivning" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Skelettmuskel&action=edit&section=4" title="Redigera avsnitts källkod: Karaktärsbeskrivning"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable sortable" width="90%" cellpadding="1" cellspacing="1"> <tbody><tr> <td><b>Fibertyp</b></td> <td><b>Typ I-fiber</b> </td> <td><b>Typ IIa-fiber</b></td> <td><b>Typ IIx-fiber</b> </td></tr> <tr> <td>Kontraktionstid</td> <td>Långsam</td> <td>Snabb</td> <td>Mycket snabb </td></tr> <tr> <td>Storlek på motorisk enhet</td> <td>Liten</td> <td>Stor </td> <td>Mycket stor </td></tr> <tr> <td>Uthållighet</td> <td>Hög</td> <td>Medium</td> <td>Låg </td></tr> <tr> <td>Lämplig aktivitet</td> <td><a href="/wiki/Aerob" title="Aerob">Aerob</a></td> <td>Långtids <a href="/wiki/Anaerob" title="Anaerob">anaerob</a> </td> <td>Korttids <a href="/wiki/Anaerob" title="Anaerob">anaerob</a> </td></tr> <tr> <td>Kraftalstring</td> <td>Låg</td> <td>Hög</td> <td>Mycket hög </td></tr> <tr> <td><a href="/wiki/Mitokondrie" title="Mitokondrie">Mitokondrietäthet</a></td> <td>Hög</td> <td>Hög</td> <td>Låg </td></tr> <tr> <td>Kapillärtäthet</td> <td>Hög</td> <td>Medium</td> <td>Låg </td></tr> <tr> <td>Oxidativ kapacitet</td> <td>Hög</td> <td>Hög</td> <td>Låg </td></tr> <tr> <td>Glukoskapacitet</td> <td>Låg</td> <td>Hög</td> <td>Hög </td></tr> <tr> <td>Mest lagrat bränsle</td> <td><a href="/wiki/Triglycerid" title="Triglycerid">Triglycerider</a> </td> <td><a href="/wiki/Glukos" title="Glukos">Glukos</a></td> <td><a href="/wiki/Glukos" title="Glukos">Glukos</a> </td></tr></tbody></table> <div class="mw-heading mw-heading4"><h4 id="Typ_I-fiberträning"><span id="Typ_I-fibertr.C3.A4ning"></span>Typ I-fiberträning</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Skelettmuskel&veaction=edit&section=5" title="Redigera avsnitt: Typ I-fiberträning" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Skelettmuskel&action=edit&section=5" title="Redigera avsnitts källkod: Typ I-fiberträning"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Med relativt låg intensitet och långvarigt arbete har man framför allt kommit fram till att typ I-fibrerna reagerar med följande förändringar: </p> <ul><li>Kapillärnätet i muskeln och dess förmåga att tillföra <a href="/wiki/Syre" title="Syre">syre</a> till muskeln ökar, framför allt runt typ I-fibern. (<a href="/wiki/Aerob" title="Aerob">aerob</a>)</li> <li><a href="/wiki/Mitokondrierna" class="mw-redirect" title="Mitokondrierna">Mitokondrierna</a> ökar i muskelcellen och dess uppgift är att frigöra <a href="/wiki/Energi" title="Energi">energi</a>. (<a href="/wiki/Adenosintrifosfat" title="Adenosintrifosfat">ATP</a>)</li> <li>Antal repetitioner på en submaximal nivå ökar.</li></ul> <div class="mw-heading mw-heading4"><h4 id="Typ_II-fiberträning"><span id="Typ_II-fibertr.C3.A4ning"></span>Typ II-fiberträning</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Skelettmuskel&veaction=edit&section=6" title="Redigera avsnitt: Typ II-fiberträning" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Skelettmuskel&action=edit&section=6" title="Redigera avsnitts källkod: Typ II-fiberträning"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Träning med höga belastningar påverkar i huvudsak typ II-fibrer. Förändringar blir i huvudsak: </p> <ul><li>Cellernas tvärsnitt ökar och därmed dess förmåga att utveckla mer <a href="/wiki/Kraft" title="Kraft">kraft</a>.</li> <li>Cellernas förmåga att arbeta utan syretillgång (<a href="/wiki/Anaerob" title="Anaerob">anaerob</a>) ökar.</li> <li>Nerv- och muskelsamspelet förbättras. Fler motoriska enheter kopplas in (teknik).</li></ul> <p>När muskeln ändrar ledvinkeln uträttar den ett dynamiskt arbete. När den drar ihop sig kallas det för koncentrisk kontraktion. När muskeln försöker dra ihop sig men dras ut för att det yttre motståndet är större, kallas det för excentrisk (bromsande) aktion. Muskeln kan då utveckla störst kraft. När den inre muskelkraften är lika med det yttre motståndet så uppstår ingen rörelse. Detta kallas för isometrisk kontraktion eller statiskt arbete. </p> <div class="mw-heading mw-heading2"><h2 id="Muskelns_kraft_och_styrka">Muskelns kraft och styrka</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Skelettmuskel&veaction=edit&section=7" title="Redigera avsnitt: Muskelns kraft och styrka" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Skelettmuskel&action=edit&section=7" title="Redigera avsnitts källkod: Muskelns kraft och styrka"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>För att kunna mäta en muskels styrka krävs kännedom dels om ursprung och fäste för den aktuella muskeln, dels hur den passerar <a href="/wiki/Led" title="Led">leden</a> det vill säga det vinkelräta avståndet från muskelkraftens verkningslinje till ledens rotationslinje. Följande data behövs: </p> <ul><li>hävstångens längd (l)</li> <li>vikten på redskapet (F)</li> <li>avståndet mellan ledaxel och fäste.(l m)</li></ul> <p>En muskel kan utveckla en maximal kraft som är cirka 50<a href="/wiki/Newton_(enhet)" title="Newton (enhet)">N</a>/<a href="/wiki/Centimeter" title="Centimeter">cm</a><sup>2</sup> av muskelns tvärsnitt. Med tvärsnitt menas det antal fibriller som muskeln innehåller. Muskelns förmåga att lyfta ett tungt föremål beror alltså på två förhållanden: dels dess fysiologiska tvärsnitt, dels hur den passerar leden. Muskelns kraftutveckling kan påverkas med hjälp av <a href="/wiki/Styrketr%C3%A4ning" title="Styrketräning">styrketräning</a>, men muskelns fäste är individerna födda med. Med andra ord, vissa individer har bättre förutsättningar för vissa aktiviteter. </p><p>Se även <a href="/wiki/Lista_%C3%B6ver_skelettmuskler" title="Lista över skelettmuskler">lista över skelettmuskler</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Externa_länkar"><span id="Externa_l.C3.A4nkar"></span>Externa länkar</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Skelettmuskel&veaction=edit&section=8" title="Redigera avsnitt: Externa länkar" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Skelettmuskel&action=edit&section=8" title="Redigera avsnitts källkod: Externa länkar"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/15px-Commons-logo.svg.png" decoding="async" width="15" height="20" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/23px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span> Wikimedia Commons har media som rör <a href="https://commons.wikimedia.org/wiki/Category:Skeletal_muscle" class="extiw" title="commons:Category:Skeletal muscle">Skelettmuskel</a>.<div class="interProject commons" style="display:none;"><a href="https://commons.wikimedia.org/wiki/Category:Skeletal_muscle" class="extiw" title="commons:Category:Skeletal muscle">Bilder & media</a></div></li> <li>Källa <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Skeletal_muscle&oldid=62568601">Engelska Wikipedia</a></li> <li><a rel="nofollow" class="external text" href="http://www.rad.washington.edu/atlas/">Muskelatlas</a></li></ul> <!-- NewPP limit report Parsed by mw‐web.eqiad.main‐6b6c9bdc8b‐m86gt Cached time: 20241102195413 Cache expiry: 2592000 Reduced expiry: false Complications: [show‐toc] CPU time usage: 0.068 seconds Real time usage: 0.089 seconds Preprocessor visited node count: 83/1000000 Post‐expand include size: 411/2097152 bytes Template argument size: 45/2097152 bytes Highest expansion depth: 5/100 Expensive parser function count: 0/500 Unstrip recursion depth: 0/20 Unstrip post‐expand size: 0/5000000 bytes Lua time usage: 0.029/10.000 seconds Lua memory usage: 757905/52428800 bytes Number of Wikibase entities loaded: 1/400 --> <!-- Transclusion expansion time report (%,ms,calls,template) 100.00% 51.614 1 -total 100.00% 51.614 1 Mall:Commonscat 3.16% 1.632 1 Mall:Iwcommonscat --> <!-- Saved in parser cache with key svwiki:pcache:idhash:94582-0!canonical and timestamp 20241102195413 and revision id 55160406. 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