{"id":4048,"date":"2025-03-21T16:11:33","date_gmt":"2025-03-21T16:11:33","guid":{"rendered":"https:\/\/movewithnicole.com.au\/blog\/understanding-type-2-muscle-fibers-and-their-functions.html"},"modified":"2025-03-21T16:11:33","modified_gmt":"2025-03-21T16:11:33","slug":"understanding-type-2-muscle-fibers-and-their-functions","status":"publish","type":"post","link":"https:\/\/ozhelp.org.au\/blog\/health\/understanding-type-2-muscle-fibers-and-their-functions.html","title":{"rendered":"Understanding Type 2 Muscle Fibers and Their Functions"},"content":{"rendered":"<p>What do a mixed martial artist, a sprinter, and an Olympic weightlifter have in common? Besides a drawer full of spandex, they all rely heavily on type 2 muscle fibers, also known as fast-twitch muscle fibers.<\/p>\n<p>Type 2 muscle fibers give a roundhouse kick more oomph and a barbell snatch its signature snap. But even if you don\u2019t have plans to step into the ring or slip on a singlet, understanding how to train your skeletal muscle fibers can help you become a better athlete.<\/p>\n<h2>What Are Type 2 Muscle Fibers?<\/h2>\n<\/p>\n<p>You use type 2 muscle fibers during short, explosive periods of physical activity, which is why they\u2019re well-known as your fast-twitch muscle fibers. \u201cType 2 muscle fibers are quicker to fatigue but can produce stronger and faster bursts of power,\u201d says Joe Tatta, PT, DPT, founder of the Integrative Pain Science Institute.<\/p>\n<p>Tatta explains that type 2 muscle fibers fit into two main categories (note that there are other types of \u201chybrid\u201d fibers):<\/p>\n<ul>\n<li><strong>Type 2a<\/strong><\/li>\n<li><strong>Type 2b<\/strong> (also referred to as type 2x, and are very rare!)<\/li>\n<\/ul>\n<p>\u201cType 2a is used more during sustained power activities, such as sprinting 400 meters or doing repeated lifts with a weight below maximum,\u201d he explains. \u201cType 2b is used for very short-duration, high-intensity bursts of power, such as maximal and near-maximal lifts and\u00a0short sprints.\u201d<\/p>\n<p>Your body uses type 1 muscle fibers \u2014 a.k.a. fatigue-resistant \u201cslow-twitch\u201d muscle fibers \u2014 during prolonged, steady-state exercises that require endurance (e.g., a 10k run or a long, leisurely bike ride).<\/p>\n<h2>How Do You Increase Type 2 Muscle Fibers?<\/h2>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-176586\" src=\"https:\/\/bod-blog-assets.prod.cd.beachbodyondemand.com\/bod-blog\/wp-content\/uploads\/2024\/09\/19124729\/type-2-muscle-fibers-600-training.jpg\" alt=\"Athlete Cleans and Snatches Barbell | Type 2 Muscle Fibers\" width=\"602\" height=\"401\" title=\"\"><\/p>\n<p>\u201cTo develop type 2 fibers, you should focus on training with heavier weights, explosive exercises, and power movements regularly,\u201d advises Breanne Celiberti, MS, former adjunct instructor in the Human Performance department at the University of Tampa.<\/p>\n<p>So if your goal is to increase type 2 muscle fibers in your legs, we recommend alternating between heavy lifts like barbell squats and deadlifts and explosive exercises like box jumps\u00a0during your workout on a rotation.<\/p>\n<p>Generally speaking, muscle fibers grow when small tears caused by physical activity heal, creating larger and stronger tissues. (If you\u2019ve ever pushed yourself during a workout, you\u2019ve likely experienced some of the\u00a0achiness and swelling\u00a0associated with this process).<\/p>\n<p>Research indicates that, with specifically tailored training, it is also possible to change type 1 muscle fibers to type 2 muscle fibers. Take note that your muscle fibers revert to an \u201cintermediate\u201d or \u2018unassigned\u2019 state \u2014 part type 1, part type 2 \u2014 with inactivity.<\/p>\n<h2>What Do Type 2 Muscle Fibers Look Like?<\/h2>\n<p>Compared to type 1 muscle fibers, which are smaller and red (contain more oxygen), type 2 muscle fibers are larger and, according to Tatta, \u201cpale.\u201d Type II muscle fibers are \u201cwhite\u201d fibers because they\u2019re used during anaerobic exercise, requiring less oxygen.<\/p>\n<p>Because type 2 muscle fibers are larger, they help determine the size and definition of a muscle.<\/p>\n<p>So, next time you\u2019re running sprints on the treadmill, dashing from one side of the court to the other, or snatching a barbell over your head, think about how you\u2019re increasing your type 2 muscle fibers!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What do a mixed martial artist, a sprinter, and an Olympic weightlifter have in common? Besides a drawer full of spandex, they all rely heavily on type 2 muscle fibers, also known as fast-twitch muscle fibers. Type 2 muscle fibers give a roundhouse kick more oomph and a barbell snatch its signature snap. But even [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4049,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[33,88,101,129,184],"class_list":["post-4048","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health","tag-athletic-performance","tag-exercise-science","tag-high-intensity-interval-training","tag-muscle-fibers","tag-weight-lifting"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/ozhelp.org.au\/blog\/wp-json\/wp\/v2\/posts\/4048","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ozhelp.org.au\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ozhelp.org.au\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ozhelp.org.au\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ozhelp.org.au\/blog\/wp-json\/wp\/v2\/comments?post=4048"}],"version-history":[{"count":0,"href":"https:\/\/ozhelp.org.au\/blog\/wp-json\/wp\/v2\/posts\/4048\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ozhelp.org.au\/blog\/wp-json\/wp\/v2\/media\/4049"}],"wp:attachment":[{"href":"https:\/\/ozhelp.org.au\/blog\/wp-json\/wp\/v2\/media?parent=4048"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ozhelp.org.au\/blog\/wp-json\/wp\/v2\/categories?post=4048"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ozhelp.org.au\/blog\/wp-json\/wp\/v2\/tags?post=4048"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}