{"id":94722,"date":"2025-08-05T13:13:39","date_gmt":"2025-08-05T11:13:39","guid":{"rendered":"https:\/\/runlovers.it\/?p=94722"},"modified":"2025-08-05T13:13:39","modified_gmt":"2025-08-05T11:13:39","slug":"the-truth-about-fatigue-why-your-brain-lies-to-you-during-a-run","status":"publish","type":"post","link":"https:\/\/runlovers.it\/en\/2025\/the-truth-about-fatigue-why-your-brain-lies-to-you-during-a-run\/","title":{"rendered":"The Truth About Fatigue: Why Your Brain Lies to You During a Run"},"content":{"rendered":"<p>Imagine your brain is a flight controller in a super busy control tower. It has dozens of screens in front of it, each with vital data: heart rate, body temperature, oxygen levels. Its job? To keep everything under control and predict what will happen in the next few minutes.<\/p>\n<p>This works perfectly when you\u2019re on the couch watching a TV show. But when you start to run, especially when you push the pace beyond your comfort zone, this flight controller starts to panic. And when your brain panics, guess who pays the price? You do, with that feeling every runner knows well: &#8220;I can&#8217;t do this anymore.&#8221;<\/p>\n<h3 id=\"the-science-behind-the-invisible-wall\">The Science Behind the Invisible Wall<\/h3>\n<p>According to <a href=\"https:\/\/www.outsideonline.com\/health\/training-performance\/why-exercise-makes-us-tired?utm_campaign=&amp;utm_content=&amp;utm_content=&amp;utm_content=&amp;utm_medium=organic-social&amp;utm_medium=organic-social&amp;utm_medium=organic-social&amp;utm_source=Outside+Magazine-instagram%3Futm_campaign%3D&amp;utm_source=Outside+Magazine-instagram%3Futm_campaign%3D&amp;utm_source=Outside+Magazine-instagram\">an article in Outside<\/a>, researchers at the University of Brighton, led by Jeanne Dekerle, discovered something revolutionary about fatigue. It&#8217;s not what you&#8217;ve always thought. It&#8217;s not just a matter of muscles that no longer respond or a lack of breath. It&#8217;s your brain losing confidence in its ability to manage the situation.<\/p>\n<p>It&#8217;s called &#8220;predictive processing,&#8221; and it&#8217;s an incredibly sophisticated mechanism. Your brain doesn&#8217;t wait for problems to arise; it anticipates them. It&#8217;s like having a personal meteorologist trying to predict whether you&#8217;ll be able to maintain your body&#8217;s internal balance over the next few miles.<\/p>\n<h4 id=\"how-the-prediction-mechanism-works\">How the Prediction Mechanism Works<\/h4>\n<p>Think about when you make coffee in the morning. Every action is automatic because your brain has already predicted every movement. It knows exactly how much force is needed to open the jar, how much water to put in the coffee maker, how long to wait. It&#8217;s a consolidated routine.<\/p>\n<p>The problem arises when you run for miles and miles. The brain tries to keep the body in a state of balance\u2014what scientists call &#8220;homeostasis&#8221;\u2014but the parameters start to go haywire. The heart beats too fast, the temperature rises, the blood&#8217;s acidity changes. Suddenly, all the brain&#8217;s predictions go out the window.<\/p>\n<p>That&#8217;s when true fatigue is born: it&#8217;s not the body giving up; it&#8217;s the brain saying, &#8220;I&#8217;m no longer sure what will happen in the next few minutes, so it&#8217;s better to slow down.&#8221;<\/p>\n<h3 id=\"effort-and-fatigue-two-different-enemies\">Effort and Fatigue: Two Different Enemies<\/h3>\n<p>This is where the discovery gets really interesting. Scientists have understood that what we feel during a long run isn&#8217;t a single sensation, but a cocktail of different perceptions. And recognizing them can change the way you run.<\/p>\n<h4 id=\"effort\">Effort<\/h4>\n<p>Effort is that feeling of &#8220;how hard is this hill?&#8221; or &#8220;my legs are about to give out.&#8221; It&#8217;s immediate, brutal, and honest. Samuele Marcora from the University of Bologna, one of the world&#8217;s leading experts, defines it as &#8220;the conscious sensation of how difficult, heavy, and tiring the exercise is.&#8221;<\/p>\n<p>The great thing about effort? As soon as you stop, it disappears. It&#8217;s like flipping a switch. You sit down, breathe, and within seconds, that heavy feeling in your legs is gone.<\/p>\n<h4 id=\"fatigue\">Fatigue<\/h4>\n<p>Fatigue is more insidious. It&#8217;s that sense of powerlessness that lingers even after you&#8217;ve stopped. Dekerle describes it as &#8220;a feeling that your capacity to cope with physical or mental stress is diminishing.&#8221; It&#8217;s the voice that whispers &#8220;you&#8217;ll never make it&#8221; even when you could technically continue.<\/p>\n<p>Fatigue is linked to your self-efficacy\u2014that is, how much you believe in your own abilities. It depends on a thousand variables: how far you are from the finish line, how much ground you&#8217;ve already covered, how many times in the past you&#8217;ve managed to complete a similar distance, and how motivated you are that day.<\/p>\n<h3 id=\"a-radical-change-in-perspective\">A Radical Change in Perspective<\/h3>\n<p>Knowing how to distinguish between effort and fatigue isn&#8217;t an academic exercise; it&#8217;s a skill that can transform your runs. It allows you <strong>to understand when your body is truly asking for a break and when it&#8217;s just your brain being fussy.<\/strong><\/p>\n<h4 id=\"when-its-effort-and-you-can-keep-going\">When it&#8217;s effort (and you can keep going)<\/h4>\n<p>If you feel your legs burning but you still have the confidence to reach the finish line, you&#8217;re probably experiencing mainly effort. It&#8217;s intense, it&#8217;s annoying, but it&#8217;s manageable. You can decide to slow down your pace, adjust your breathing, or simply accept that it&#8217;s part of the game.<\/p>\n<h4 id=\"when-its-fatigue-and-you-need-to-listen\">When it&#8217;s fatigue (and you need to listen)<\/h4>\n<p>If, on the other hand, you feel your confidence collapsing, that you&#8217;ve lost the connection with your body, that you can no longer imagine getting to the end, then it&#8217;s probably fatigue taking over. In this case, stopping isn&#8217;t a failure\u2014it&#8217;s intelligence.<\/p>\n<h3 id=\"how-to-train-your-brain-to-trust-your-perceptions\">How to Train Your Brain to Trust Your Perceptions<\/h3>\n<p>The most important discovery of this research is that <strong>fatigue isn&#8217;t just a physical fact but a mental one, too.<\/strong> And if it&#8217;s mental, it can be trained.<\/p>\n<h4 id=\"build-your-library-of-successes\">Build Your Library of Successes<\/h4>\n<p>Every time you complete a difficult run, you&#8217;re telling your brain, &#8220;See? We did it.&#8221; This experience becomes part of your &#8220;personal library&#8221; of evidence that you can handle effort. The more positive experiences you accumulate, the more your brain will learn to trust its predictions when the situation gets tough.<\/p>\n<h4 id=\"practice-mindfulness-during-the-run\">Practice Mindfulness During the Run<\/h4>\n<p>Instead of passively enduring the sensations that arise, try to observe them. &#8220;Okay, I feel my heart is accelerating, but I can manage it. I feel my legs are heavy, but I&#8217;ve had this feeling before and I always made it to the end.&#8221;<\/p>\n<p>It&#8217;s like becoming the narrator of your run instead of just the protagonist who endures the events.<\/p>\n<h4 id=\"train-progressively\">Train Progressively<\/h4>\n<p>The brain learns from repeated experiences. If you stop immediately every time you feel fatigue, you&#8217;re teaching your internal flight controller that this sensation means &#8220;danger, you must stop.&#8221; If, instead, you gradually get used to managing increasing levels of discomfort, the brain will start to have more confidence in its predictive abilities.<\/p>\n<h3 id=\"the-power-of-awareness\">The Power of Awareness<\/h3>\n<p>An interesting thing that emerged from the research is that naming and recognizing your feelings can help, but you have to be careful not to overdo it. As <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC9383041\/\">a Harvard study found<\/a>, sometimes over-analyzing negative emotions can make them more persistent.<\/p>\n<p>The secret is to find balance: be aware without becoming obsessive, and recognize the signals without amplifying them.<\/p>\n<h4 id=\"the-note-and-continue-strategy\">The \u201cNote and Continue\u201d Strategy<\/h4>\n<p>When you feel fatigue coming on, try this technique:<\/p>\n<p>Recognize: &#8220;Okay, I&#8217;m feeling fatigued.&#8221; Categorize: &#8220;Is it physical effort or a loss of confidence?&#8221; Decide: &#8220;Can I continue at this pace, or do I need to adapt?&#8221; Act: modify your pace, change your breathing, or simply continue, knowing it&#8217;s normal.<\/p>\n<h3 id=\"the-brain-is-your-ally\">The Brain Is Your Ally<\/h3>\n<p>The most revolutionary discovery of this research isn&#8217;t that the brain holds us back, but that we can learn to collaborate with it. It&#8217;s not an enemy to be defeated but a sophisticated security system trying to protect us.<\/p>\n<p>The next time you hear that inner voice telling you &#8220;that&#8217;s enough,&#8221; stop for a moment. Not to give up, but to understand. Is it really your body that has reached its limit, or is it your brain making an overly pessimistic prediction based on incomplete information?<\/p>\n<p>A Constructive Dialogue<\/p>\n<p>Instead of fighting against fatigue, try to have a dialogue with it:<\/p>\n<p>&#8220;Okay, brain, I know you&#8217;re trying to protect me.&#8221; &#8220;You&#8217;re right, the situation is challenging, but we can handle it.&#8221; &#8220;We&#8217;ve already overcome difficult moments like this.&#8221; &#8220;Trust what we&#8217;ve built together during training.&#8221;<\/p>\n<h3 id=\"the-truth-that-changes-everything\">The Truth That Changes Everything<\/h3>\n<p>Here&#8217;s the truth that can transform the way you run: <strong>fatigue isn&#8217;t always a stop sign; often, it&#8217;s just a sign of uncertainty.<\/strong> Your brain isn&#8217;t saying &#8220;you can&#8217;t do it&#8221;; it&#8217;s saying &#8220;I&#8217;m not sure what&#8217;s going to happen.&#8221;<\/p>\n<p>And when you understand this, everything changes. Because you can start responding to that uncertainty not with surrender but with confidence built through experience, training, and self-knowledge.<\/p>\n<p>The next time you&#8217;re there, halfway through a tough run, with your brain starting to doubt, remember: it&#8217;s not a battle to be won; it&#8217;s a dialogue to be built. Between you and that part of you that just wants to be sure everything will be okay.<\/p>\n<p>And maybe, just maybe, you&#8217;ll be able to run not only with your legs but also with your mind by your side.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Uncover the truth about running fatigue. It&#8217;s not just your body giving up; it&#8217;s your brain losing confidence. Learn to distinguish between effort and fatigue and train your mind to push past your limits.<\/p>\n","protected":false},"author":2,"featured_media":94718,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[15211],"tags":[22626],"powerkit_post_featured":[],"class_list":{"0":"post-94722","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-tips","8":"tag-effort-and-fatigue"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>The Truth About Fatigue: Why Your Brain Lies to You During a Run - Runlovers<\/title>\n<meta name=\"description\" content=\"Uncover the truth about running fatigue. 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