{"id":1176883,"date":"2025-12-09T15:58:59","date_gmt":"2025-12-09T15:58:59","guid":{"rendered":"https:\/\/www.muscleandfitness.com\/?p=1176883"},"modified":"2025-12-09T15:58:59","modified_gmt":"2025-12-09T15:58:59","slug":"does-cardio-kill-your-gains-the-truth-about-cardio-timing","status":"publish","type":"post","link":"https:\/\/www.muscleandfitness.com\/workouts\/workout-tips\/does-cardio-kill-your-gains-the-truth-about-cardio-timing\/","title":{"rendered":"Does Cardio Kill Your Gains? The Truth About Cardio Timing"},"content":{"rendered":"<p>So, what\u2019s the truth between these opposite points of view? Is there really a <a href=\"https:\/\/www.muscleandfitness.com\/workouts\/workout-tips\/training-principles-on-how-to-build-muscle-with-cardio\/\" target=\"_blank\" rel=\"noopener\">\u201cright\u201d time to do cardio<\/a>, and will it crush your gains? The short answer: It depends on your goals.<\/p>\n<p>Ask any \u201cexpert\u201d when it\u2019s best to include cardio in your workout and you\u2019re sure to get answers ranging from \u201cDo your cardio first to warm up\u201d to \u201cNever do cardio before leg day.\u201d And, of course, there\u2019s this: \u201cCardio kills your gains.\u201d<\/p>\n<p>However, the myth that cardio ruins your gains needs to go. Improving your cardiovascular health enhances recovery, reduces stress, and keeps you above ground longer.<\/p>\n<p>For years, lifters have feared that running a few miles on the treadmill or a post-lift HIIT session would shred their hard-earned muscle. And while poor cardio timing can interfere with your progress, well-programmed cardio can actually complement it.<\/p>\n<p>Here we\u2019ll break down the science, debunk the fear, and show you when cardio helps, when it hurts, and how to structure it based on your goals.<\/p>\n<p><div class=\"iframe-wrap\"><iframe loading=\"lazy\" title=\"How Cardio Might Be KILLING Your Gains!\" width=\"563\" height=\"1000\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen data-src=\"https:\/\/www.youtube.com\/embed\/lZGjLO3-FHY?feature=oembed\" class=\"optanon-category-C0002-C0005 youtube-embed\"><\/iframe><\/div><\/p>\n<h2>Origin of the Cardio Myth<\/h2>\n<p>The idea that cardio kills your muscle gains didn\u2019t come from the lab\u2014it came from the gym bros.<\/p>\n<p>Old-school bodybuilders viewed cardio as the enemy. It\u2019s hard to argue with a muscular guy who believes anything more than five reps is considered cardio. Back then, the message was clear: If building muscle is the goal, cardio is a waste of time. Cardio was only something you suffered through to lean out fast during a cutting phase.<\/p>\n<p>The way endurance athletes looked only reinforced the contrast. Lifters saw that look and thought, \u201cThat\u2019s what cardio does? No thanks.\u201d<\/p>\n<p>This mindset grew even stronger in the early 2000s, when fitness culture split into two distinct groups: cardio bunnies who didn\u2019t want to get bulky and lifters who did. Then influencers and gym-bros added fuel to that fire, dismissing steady-state cardio and warning everyone that it ruins your gains.<\/p>\n<p>That fear stuck around, and what got lost in all the noise? Context.<\/p>\n<p>Now it\u2019s time to provide some.<\/p>\n<h2>How Cardio Really Helps Your Gains<\/h2>\n<p>Cardio isn\u2019t the villain in your muscle-building quest. When it\u2019s programmed and performed well, it\u2019s a tool that supports fat loss, improves recovery, and boosts your work capacity.<\/p>\n<p>Here are three good reasons to combine cardio with your lifting.<\/p>\n<h3>Fat Loss &amp; Conditioning<\/h3>\n<p>If your main goal is to lose fat while keeping muscle, cardio can be your ally\u2014but it\u2019s all about timing and intensity. Doing cardio after lifting, when glycogen stores are low, can boost your fat-burning efforts. One 2015 study in Sports Medicine found that combining resistance training with post-lifting cardio improved body composition more than resistance training alone\u2014without negatively impacting strength.<\/p>\n<h3>LISS: Low-Impact, High-Return<\/h3>\n<p>Low-Intensity Steady-State (LISS) cardio\u2014such as incline walking, cycling, or light rowing\u2014has little impact on strength or hypertrophy. It helps recovery by increasing blood flow to sore muscles, reducing stress, and improving sleep.<\/p>\n<h3>Heart Gains Are Still Gains<\/h3>\n<p>Better cardio equals improved work capacity. That means you can recover faster between sets, train harder during workouts, and keep your engine humming longer. That\u2019s not \u201closing gains\u201d\u2014that\u2019s optimizing them.<\/p>\n<h2>Cardio Timing Really Does Matter<\/h2>\n<p>Like many myths, there\u2019s a sliver of truth buried beneath it. Cardio doesn\u2019t automatically ruin gains\u2014but it\u2019s all about the timing.<\/p>\n<p>High-Intensity Cardio Before Lifting? Not Ideal<\/p>\n<p>If you jump right into sprints, hill intervals, or a long-distance run before lifting, you\u2019re starting your lift fatigued. That\u2019s a problem\u2014especially for compound lifts that require maximum effort.<\/p>\n<p>Here\u2019s why:<\/p>\n<ul>\n<li>Your central nervous system isn\u2019t as sharp.<\/li>\n<li>Muscle glycogen is partially depleted.<\/li>\n<li>Power output and lifting technique suffer, especially on lifts requiring explosiveness and stability. A 2016<a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1080\/17461391.2016.1236148\"> <em>Journal of Sports Sciences<\/em> study<\/a> found that doing cardio before strength training reduces strength performance.<\/li>\n<\/ul>\n<h3>The Interference Effect Is Real<\/h3>\n<p>The \u201cinterference effect\u201d describes the competing adaptations that happen when endurance and strength training are not effectively combined. A <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/22002517\/\">comprehensive review in<em> JSCR<\/em><\/a> showed that concurrent training can blunt hypertrophy and strength development, primarily when modalities are performed back-to-back at high frequency and with poor sequencing.<\/p>\n<p>It\u2019s not about avoiding cardio\u2014it\u2019s about placing it where it fits. Before strength work, it may compromise performance. Afterward, it becomes a tool for recovery, conditioning, and body composition.<\/p>\n<h2>Goal-Based Cardio Timing<\/h2>\n<p>So, when are the best times to do your cardio? The best time to do cardio depends on your training goal, plain and simple. Here\u2019s how to make it work for you.<\/p>\n<h3>For Fat Loss:<\/h3>\n<ul>\n<li>When to Do It: After lifting, or in separate sessions.<\/li>\n<li>Why: You\u2019ve already used your glycogen during strength work\u2014now you can really tap into fat and glycogen stores, depending on whether you\u2019re doing HITT or LISS.<\/li>\n<li>Bonus: Fasted morning cardio on off-days can enhance the deficit, if recovery is on point.<\/li>\n<\/ul>\n<h3>For Muscle:<\/h3>\n<ul>\n<li>When to Do It: After weights or on rest days.<\/li>\n<li>Why: Your energy needs to go toward muscle growth. Don\u2019t drain your CNS with high-intensity cardio first.<\/li>\n<li>Tip: 1\u20132 short LISS sessions per week is usually plenty to maintain conditioning when maximum muscle is the goal.<\/li>\n<\/ul>\n<h3>For Endurance:<\/h3>\n<ul>\n<li>When to Do It: Prioritize cardio sessions and do strength work after or on alternate days.<\/li>\n<li>Why: Your performance hinges on aerobic output\u2014lift to support durability and reduce injury risk<\/li>\n<\/ul>\n<h2>Here\u2019s What Happens When You Believe Cardio Eats Your Gains<\/h2>\n<p>Thinking that cardio automatically cancels out strength gains has repercussions. Here\u2019s how this myth causes problems with progress:<\/p>\n<h3>Lifters Avoid Cardio Altogether<\/h3>\n<p>Many strength-focused lifters eliminate cardio out of fear that it will \u201csteal\u201d their gains. But skipping conditioning means they\u2019re missing out on the cardiovascular health, recovery benefits, and work capacity that actually support better lifting\u2014being strong but winded after a single flight of stairs? That\u2019s not performance; that\u2019s your heart telling you to do your cardio.<\/p>\n<h3>Pushes False Either\/Or Mentality<\/h3>\n<p>This myth promotes a black-and-white view: either you\u2019re a \u201ccardio person\u201d or a \u201cstrength person.\u201d That\u2019s limiting. A balanced training plan can and should include both when timed and programmed well. Lifters who buy into the myth miss out on the benefits of becoming well-rounded athletes.<\/p>\n<h3>Miss Out on Health and Recovery Benefits<\/h3>\n<p>Cardio isn\u2019t just about burning fat. It boosts heart health, circulation, blood pressure, and metabolic flexibility\u2014key pillars of long-term performance and wellness. When you neglect cardio, these benefits diminish. Additionally, low-intensity cardio, such as walking or cycling, supports active recovery by increasing blood flow to sore muscles, clearing waste products, and delivering nutrients. That leads to better recovery between lifting sessions.<\/p>\n<h3>Stalls Fat Loss and Conditioning<\/h3>\n<p>Strength training alone often doesn\u2019t provide enough of a metabolic boost to promote fat loss, especially in experienced lifters. Without some form of steady-state or interval-based cardio, your body has fewer tools to burn calories efficiently and adapt to longer-duration workouts due to a lack of aerobic endurance. This lack of endurance becomes apparent during cutting phases, when cardio is crucial for maintaining a caloric deficit without losing lean mass.<\/p>\n<h2>The Final Takeaway<\/h2>\n<p>Cardio doesn\u2019t kill your gains\u2014but poor planning might. The myth that cardio and lifting can\u2019t coexist is like saying you can\u2019t eat carbs and still get lean. It\u2019s not about one or the other. It\u2019s about smart sequencing.<\/p>\n<p>If strength, size, or power is your main priority, lift first. That\u2019s when your nervous system is sharp, your muscles are fresh, and your output will be highest. Cardio can come later\u2014either at the end of your session or on separate days, depending on the intensity. On the flip side, if you\u2019re training for endurance or working toward a race, prioritize cardio first and treat your lifts like performance support.<\/p>\n<p>Cardio isn\u2019t your enemy; it\u2019s your ally when used at the right time, in the right way.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>So, what\u2019s the truth between these opposite points of view? Is there really a \u201cright\u201d time to do cardio, and will it crush your gains? The short answer: It depends on your goals. Ask any \u201cexpert\u201d when it\u2019s best to include cardio in your workout and you\u2019re sure to get answers ranging from \u201cDo your [&hellip;]<\/p>\n","protected":false},"author":115,"featured_media":1170633,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_links_to":"","_links_to_type":0,"footnotes":""},"categories":[390],"tags":[740,601,9776,9921,9884,10040,10341,10415,714],"coauthors":[10237],"class_list":{"0":"post-1176883","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-workout-tips","8":"tag-topic-a","9":"tag-cardio","10":"tag-cardiovascular","11":"tag-expert-tips","12":"tag-fitness-tips","13":"tag-muscle-building-tips","14":"tag-training-methods","15":"tag-training-myths","16":"tag-training-tips"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Does Cardio Kill Your Gains? 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