{"id":76,"date":"2020-02-14T16:54:00","date_gmt":"2020-02-14T16:54:00","guid":{"rendered":"https:\/\/www.hypertrophia.com\/?p=76"},"modified":"2021-06-08T14:31:18","modified_gmt":"2021-06-08T19:31:18","slug":"muscle-hypertrophy-myofibrillar-sarcoplasmic","status":"publish","type":"post","link":"https:\/\/www.gghc.org\/muscle-hypertrophy-myofibrillar-sarcoplasmic","title":{"rendered":"Muscle Hypertrophy Explained &#8211; Myofibrillar and Sarcoplasmic"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"678\" height=\"451\" src=\"https:\/\/www.gghc.org\/wp-content\/uploads\/2018\/05\/bodybuilder1.jpg\" alt=\"muscle hypertrophy\" class=\"wp-image-141\" srcset=\"https:\/\/www.gghc.org\/wp-content\/uploads\/2018\/05\/bodybuilder1.jpg 678w, https:\/\/www.gghc.org\/wp-content\/uploads\/2018\/05\/bodybuilder1-300x200.jpg 300w, https:\/\/www.gghc.org\/wp-content\/uploads\/2018\/05\/bodybuilder1-600x400.jpg 600w\" sizes=\"(max-width: 678px) 100vw, 678px\" \/><\/figure><\/div>\n\n\n\n<p><strong>Muscle hypertrophy<\/strong> = the increase in size of skeletal muscle via growth of its component cells.<\/p>\n\n\n\n<p>It\u2019s important that you understand at least the basics of the two ways in which your muscle fibers grow. They are:<\/p>\n\n\n\n<ol><li><strong>Myofibrillar Hypertrophy<\/strong><\/li><li><strong>Sarcoplasmic Hypertrophy<\/strong><\/li><\/ol>\n\n\n\n<p>You\u2019ve probably seen diagrams of muscle fibers in cross-section. Imagine a pipe with smaller cables running through it and you\u2019re most of the way there.<\/p>\n\n\n\n<p>The cables represent the myofibrils and the space between them represents the sarcoplasm.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 ez-toc-wrap-right counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<p class=\"ez-toc-title\">Content Table<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-662de4445c220\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-662de4445c220\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.gghc.org\/muscle-hypertrophy-myofibrillar-sarcoplasmic\/#What_Are_Myofibrils\" title=\"What Are Myofibrils?\">What Are Myofibrils?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.gghc.org\/muscle-hypertrophy-myofibrillar-sarcoplasmic\/#What_is_the_Sarcoplasm\" title=\"What is the Sarcoplasm?\">What is the Sarcoplasm?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.gghc.org\/muscle-hypertrophy-myofibrillar-sarcoplasmic\/#Strength_versus_Size_Argument\" title=\"Strength versus Size Argument\">Strength versus Size Argument<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.gghc.org\/muscle-hypertrophy-myofibrillar-sarcoplasmic\/#The_Skill_Component\" title=\"The Skill Component\">The Skill Component<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.gghc.org\/muscle-hypertrophy-myofibrillar-sarcoplasmic\/#Mutually_Beneficial_but_Not_Mutually_Exclusive\" title=\"Mutually Beneficial but Not Mutually Exclusive\">Mutually Beneficial but Not Mutually Exclusive<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.gghc.org\/muscle-hypertrophy-myofibrillar-sarcoplasmic\/#Summary_%E2%80%93_How_Can_I_Use_This_Information\" title=\"Summary &#8211; How Can I Use This Information?\">Summary &#8211; How Can I Use This Information?<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Are_Myofibrils\"><\/span>What Are Myofibrils?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Myofibrils &#8211; the cables in our pipe metaphor &#8211; are long chains of contractile proteins. They are responsible for the actual contractions of muscle fibers, for example when you lift a weight in the gym.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Myofibrillar Hypertrophy<\/strong> is therefore the growth in size and quantity of the myofibrils within the muscle fibers.<\/p><\/blockquote>\n\n\n\n<p>It is often said that myofibrillar hypertrophy directly corresponds to increased strength and maximum force output.<\/p>\n\n\n\n<p>Training specifically and regularly with heavy weight (near the one rep max &#8211; 1RM &#8211; weight) is known to trigger myofibrillar hypertrophy.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_the_Sarcoplasm\"><\/span>What is the Sarcoplasm?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Going back to the pipe visualization, the sarcoplasm would be the areas between the cable-like myofibrils, except that the sarcoplasm is not empty space.<\/p>\n\n\n\n<p>It is in fact much like the cytoplasm of the cell, which is comprised largely of the gel like substance that surrounds the nucleus.<\/p>\n\n\n\n<p>You can think of the sarcoplasm as the softer \u201cgel-like\u201d substance surrounding the tougher, \u201crope-like\u201d myofibrils.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Sarcoplasmic Hypertrophy<\/strong> can therefore be thought of as the enlargement of the sarcoplasm, or growth of the sarcoplasmic volume.<\/p><\/blockquote>\n\n\n\n<p>It can be assumed that sarcoplasmic hypertrophy directly corresponds to increased size of muscle fibers, and thus whole muscles.<\/p>\n\n\n\n<p>There have been different theories offered as to the main purpose of sarcoplasmic hypertrophy.<\/p>\n\n\n\n<p>You will find one generally accepted theory is that it increases the volume for muscle glycogen storage. Glycogen is basically globs of glucose, and a major source of energy.<\/p>\n\n\n\n<p>For experts, the glycogen storage theory doesn\u2019t paint the whole picture. The sarcoplasm is also a protein reservoir.<\/p>\n\n\n\n<p>Expansion of the sarcoplasmic protein reservoir is probably a more logical explanation for sarcoplasmic hypertrophy, with increased glycogen storage being a concomitant or resultant benefit.<\/p>\n\n\n\n<p>Training specifically for enhanced muscle size involves a lot more sarcoplasmic hypertrophy, and thus \u201chigh volume\u201d training.<\/p>\n\n\n\n<p>This usually means employing lower weight than specific strength training, but with higher reps, or \u201cvolume\u201d sets, often to muscle failure.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"760\" height=\"184\" src=\"https:\/\/www.gghc.org\/wp-content\/uploads\/2018\/05\/Bodybuilders-strive-for-aesthetic-perfection.jpg\" alt=\"Bodybuilders strive for aesthetic perfection\" class=\"wp-image-270\" srcset=\"https:\/\/www.gghc.org\/wp-content\/uploads\/2018\/05\/Bodybuilders-strive-for-aesthetic-perfection.jpg 760w, https:\/\/www.gghc.org\/wp-content\/uploads\/2018\/05\/Bodybuilders-strive-for-aesthetic-perfection-300x73.jpg 300w\" sizes=\"(max-width: 760px) 100vw, 760px\" \/><\/figure><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Strength_versus_Size_Argument\"><\/span>Strength versus Size Argument<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Training predominantly for muscle size, i.e. bodybuilding is regarded by many as involving the growth of a lot of non-functional muscle mass.<\/p>\n\n\n\n<p>That is to say a bodybuilder has huge muscles but can\u2019t lift as much as someone much smaller who has trained as a powerlifter or weightlifter.<\/p>\n\n\n\n<p>Physique goals are different as well. <span style=\"text-decoration: underline;\"><strong>Bodybuilders strive for aesthetic perfection<\/strong><\/span>, muscle balance and symmetry, whereas powerlifters, weightlifters and strongmen train almost purely for strength and increased force output. Some bodybuilders turn to supplements to add muscle or burn fat, some turn to using steroids. The latter is bad idea for many reasons &#8211; unless they belong to the new breed of <strong>legal steroids<\/strong> &#8211; <a href=\"https:\/\/www.gghc.org\/best-legal-steroids\">bodybuilding supplements that work like steroids<\/a> but are safe and legal.<\/p>\n\n\n\n<p>As such, the latter group tend to build physiques functional to their discipline or multi-discipline sport.<\/p>\n\n\n\n<p>It follows that a bodybuilder has more sarcoplasmic volume and less myofibril density than a pure strength athlete.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Skill_Component\"><\/span>The Skill Component<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Much of a strength athlete\u2019s ability to lift heavier weights than a bodybuilder is actually down to practice, and hence skill.<\/p>\n\n\n\n<p>Powerlifters are regularly lifting weights that are high percentages of their 1RM (one rep max &#8211; the maximum weight they can lift for one rep only).<\/p>\n\n\n\n<p>Furthermore, they use less movements than a bodybuilder because they strive primarily for the functional necessities of the sport.<\/p>\n\n\n\n<p>By contrast, a bodybuilder must train every muscle of their body in various ways to grow each one to its maximum size.<\/p>\n\n\n\n<p>So, where a strongman will squat, deadlift, pull, press and bench heavy weight in big compound movements, a bodybuilder will do that with moderate weight as well as working on all the satellite muscles of the smaller muscle groups.<\/p>\n\n\n\n<p><strong>Basically, the skill of regularly lifting bigger weight has a huge effect on the ability to do so.<\/strong><\/p>\n\n\n\n<p>Here\u2019s an <a href=\"https:\/\/www.strongerbyscience.com\/sarcoplasmic-vs-myofibrillar-hypertrophy\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"excellent article on the science of sarcoplasmic vs myofibrillar hypertrophy (opens in a new tab)\">excellent article on the science of sarcoplasmic vs myofibrillar hypertrophy<\/a> if you don\u2019t mind getting into the technical stuff.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mutually_Beneficial_but_Not_Mutually_Exclusive\"><\/span>Mutually Beneficial but Not Mutually Exclusive<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>It turns out that sarcoplasmic hypertrophy is probably an inevitable function of resistance training. Whether you\u2019re particularly aiming for size or not, there will be some increase there no matter what &#8211; after all, powerlifters aren\u2019t exactly small.<\/p>\n\n\n\n<p>The same can be said for myofibrillar hypertrophy. Of course someone who wants to get massive has to increase their strength significantly.<\/p>\n\n\n\n<p>Bodybuilders also find it very easy to switch to all-out strength when they want to. Using the earlier metaphor again; this could be because they\u2019ve built their pipes bigger, and so they can pack more cables in by changing up their training style.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>If sarcoplasmic hypertrophy expands the sarcoplasmic protein reservoir then it stands to reason that this would serve the myofibrils well, if not providing direct functional strength in and of itself.<\/p><\/blockquote>\n\n\n\n<p>The non-contractile proteins in the sarcoplasm are heavily involved in anaerobic metabolism, which bodybuilding training relies on to a large degree.<\/p>\n\n\n\n<p>Volume sets where the muscle tissue is worked way past lactate threshold and into the pure anaerobic zone would benefit greatly from increased sarcoplasmic proteins.<\/p>\n\n\n\n<p>Sets of 3 or 4 reps with heavy weight you\u2019re mostly remaining in the aerobic zone and using muscle <a href=\"https:\/\/www.gghc.org\/creatine-or-beta-alanine\">creatine<\/a> and phosphocreatine stores for energy. The sarcoplasm therefore doesn\u2019t need to be as expansive if strength sets make up the habitual training regimen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Summary_%E2%80%93_How_Can_I_Use_This_Information\"><\/span>Summary &#8211; How Can I Use This Information?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Most people reading this won\u2019t want to compete for the Mr. Olympia title, or indeed become the strongest man in the world, anytime soon.<\/p>\n\n\n\n<p>The differences between sarcoplasmic and myofibrillar hypertrophy are important to understand because it gives you an idea as to how you should train for specific physique and strength targets.<\/p>\n\n\n\n<p>I recommend a mixture of strength and volume training in order to get best of both worlds: functional and aesthetic.<\/p>\n\n\n\n<p>In my opinion, sarcoplasmic hypertrophy shouldn\u2019t be viewed as non-functional muscle growth because it obviously provides an energy pool for the muscles to tap into during anaerobic exercise.<\/p>\n\n\n\n<p>Personally, I put more emphasis on strength training for myofibrillar hypertrophy because it provides a platform of stability and functionality, while helping to prevent injury and chronic exhaustion as you progress.<\/p>\n\n\n\n<p>To get really big, you will need to lift heavy weight regardless of the weight\u2019s proportion to your maximal output. Bodybuilders might squat, press and bench less weight than a pure strength athlete, but they still lift ridiculously heavy weights compared to the average person.<\/p>\n\n\n\n<p>My advice: don\u2019t choose between size or strength. Take the best of both.<\/p>\n\n\n\n<p class=\"has-text-align-center\"><span style=\"text-decoration: underline;\"><strong><a href=\"https:\/\/www.gghc.org\/training-different-muscle-fiber-types-fast-twitch-slow-twitch\">Click here to read about the different muscle fiber types and what you should know as a lifter<\/a><\/strong><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Muscle hypertrophy = the increase in size of skeletal muscle via growth of its component cells. It\u2019s important that you understand at least the basics of the two ways in which your muscle fibers grow. They are: Myofibrillar Hypertrophy Sarcoplasmic Hypertrophy You\u2019ve probably seen diagrams of muscle fibers in cross-section. Imagine a pipe with smaller [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":141,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[335],"tags":[26,59,175,188,222,228],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is Muscle Hypertrophy? - Myofibrillar and Sarcoplasmic<\/title>\n<meta name=\"description\" content=\"Muscle hypertrophy is the increase in size of skeletal muscle via growth of its component cells. It\u2019s iMyofibrillar and Sarcoplasmic Hypertrophy\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.gghc.org\/muscle-hypertrophy-myofibrillar-sarcoplasmic\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Muscle Hypertrophy? - Myofibrillar and Sarcoplasmic\" \/>\n<meta property=\"og:description\" content=\"Muscle hypertrophy is the increase in size of skeletal muscle via growth of its component cells. 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