{"id":14777,"date":"2025-07-25T21:42:44","date_gmt":"2025-07-25T14:42:44","guid":{"rendered":"https:\/\/loudhdtv.com\/?p=14777"},"modified":"2025-07-25T21:42:44","modified_gmt":"2025-07-25T14:42:44","slug":"endurance-training-and-low-libido-whats-the-connection","status":"publish","type":"post","link":"https:\/\/loudhdtv.com\/?p=14777","title":{"rendered":"Endurance Training And Low Libido: What&#8217;s The Connection?"},"content":{"rendered":"<p> <script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3711241968723425\"\r\n     crossorigin=\"anonymous\"><\/script><br \/>\n<\/p>\n<div>\n<p>Exercise is widely known to support heart health, boost mood, and enhance confidence. But what if too much of it\u2014especially endurance training like marathon running or cycling\u2014starts to interfere with your sex drive?<\/p>\n<p>Surprisingly, recent research shows that <strong>chronic, high-volume endurance exercise may reduce libido in men<\/strong>. The growing body of evidence, spearheaded by researchers like Dr. Anthony Hackney, suggests that <strong>chronic high-volume training is a risk factor for exercise-induced hypogonadism.<\/strong><\/p>\n<p>This article breaks down the science, what it means for athletes, and how to train smart without compromising your sexual health.<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\"><span id=\"Testosterone_The_Key_Link_Between_Endurance_and_Libido\"><strong>Testosterone: The Key Link Between Endurance and Libido<\/strong><\/span><\/h2>\n<h3 class=\"wp-block-heading\"><span id=\"What_Is_Testosterone\"><strong>What Is Testosterone?<\/strong><\/span><\/h3>\n<p><a href=\"https:\/\/fitnessprogramer.com\/testosterone\/\" target=\"_blank\" rel=\"noreferrer noopener\">Testosterone<\/a> is a primary androgenic hormone produced in the testes (men), ovaries (women), and adrenal glands.<\/p>\n<p><strong>Testosterone functions include:<\/strong><\/p>\n<ul class=\"wp-block-list\">\n<li>Regulating libido and sexual function<\/li>\n<li>Stimulating muscle protein synthesis<\/li>\n<li>Supporting bone mineral density<\/li>\n<li>Influencing mood, energy, and cognitive function<\/li>\n<li>Governing spermatogenesis (sperm production)<\/li>\n<\/ul>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h3 class=\"wp-block-heading\"><span id=\"Resting_Testosterone\"><strong>Resting Testosterone:<\/strong><\/span><\/h3>\n<p>\u201cResting testosterone\u201d refers to the hormone level measured in a calm, non-stimulated state. It\u2019s typically drawn <strong>early in the morning (7:00\u201310:00 AM)<\/strong> after 8+ hours of fasting, with no recent exercise, alcohol, or sexual activity. This is when levels naturally peak due to diurnal rhythms.<\/p>\n<h4 class=\"wp-block-heading\"><span id=\"Clinical_Testosterone_Ranges_Men\"><strong>Clinical Testosterone Ranges (Men)<\/strong><\/span><\/h4>\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th><strong>Age Group<\/strong><\/th>\n<th><strong>Total Testosterone Range<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>19\u201339 years<\/td>\n<td>300\u20131000 ng\/dL (10.4\u201334.7 nmol\/L)<\/td>\n<\/tr>\n<tr>\n<td>40+ years<\/td>\n<td>Decline of ~1% per year is common<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"\/>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\"><span id=\"How_Endurance_Exercise_Affects_Male_Libido\"><strong>How Endurance Exercise Affects Male Libido<\/strong><\/span><\/h2>\n<p>Dr. Anthony Hackney and colleagues conducted one of the first large-scale studies to investigate how <strong>endurance exercise training affects male libido<\/strong>.<\/p>\n<h3 class=\"wp-block-heading\"><span id=\"Study_Summary\"><strong>Study Summary:<\/strong><\/span><\/h3>\n<ul class=\"wp-block-list\">\n<li><strong>Participants:<\/strong> 1,077 healthy, physically active men<\/li>\n<li><strong>Method:<\/strong> Online survey assessing training habits, exercise duration, intensity, and sexual libido<\/li>\n<\/ul>\n<h3 class=\"wp-block-heading\"><span id=\"Key_Findings\"><strong>Key Findings<\/strong><\/span><\/h3>\n<ul class=\"wp-block-list\">\n<li>Men with <strong>higher training intensity and longer weekly duration<\/strong> were significantly more likely to report <strong>low libido<\/strong>.<\/li>\n<li>Those with <strong>low to moderate training intensity<\/strong> had <strong>2.8\u20136.9 times<\/strong> greater odds of reporting healthy libido compared to those with the most intense routines.<\/li>\n<li>Similarly, shorter and moderate-duration athletes reported <strong>better libido scores<\/strong> than those training for the longest periods.<\/li>\n<\/ul>\n<p><strong>Conclusion:<\/strong> \u201cExposure to higher levels of chronic intense and greater durations of endurance training on a regular basis is significantly associated with decreased libido scores in men.\u201d \u2014 <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/28195945\/\" target=\"_blank\" rel=\"noreferrer noopener\">Hackney et al., 2017<\/a><\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h3 class=\"wp-block-heading\"><span id=\"Testosterone_Trends_in_Long-Term_Endurance_Athletes\"><strong>Testosterone Trends in Long-Term Endurance Athletes<\/strong><\/span><\/h3>\n<p>To understand the magnitude of testosterone suppression, <a href=\"https:\/\/link.springer.com\/article\/10.1007\/s42000-018-0010-z\" target=\"_blank\" rel=\"noreferrer noopener\">researchers<\/a> evaluated data from <strong>196 endurance-trained male runners<\/strong> and <strong>matched non-exercising controls<\/strong>. Key study parameters included:<\/p>\n<ul class=\"wp-block-list\">\n<li>Competitive running of \u226510 km.<\/li>\n<li>Training \u22657+ hours per week for at least 1 year.<\/li>\n<li>Matched controls by <strong>age, BMI, and ethnicity<\/strong>.<\/li>\n<li>Resting total testosterone measured in the morning after fasting and rest.<\/li>\n<\/ul>\n<p>Testosterone levels were reported as a <strong>percentage relative to the control subject<\/strong>, then stratified by <strong>training duration<\/strong>: <strong>1, 2, 5, 10, and 15+ years.<\/strong><\/p>\n<h3 class=\"wp-block-heading\"><span id=\"Findings_The_Longer_the_Training_the_Lower_the_Testosterone\"><strong>Findings: The Longer the Training, the Lower the Testosterone<\/strong><\/span><\/h3>\n<p>It turns out that there is a significant drop in testosterone as the years of endurance training increase:<\/p>\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th>Years of Training<\/th>\n<th>Testosterone vs. Control<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1 Year<\/td>\n<td>Slightly Reduced<\/td>\n<\/tr>\n<tr>\n<td>2 Years<\/td>\n<td>Moderately Reduced<\/td>\n<\/tr>\n<tr>\n<td><strong>5+ Years<\/strong><\/td>\n<td><strong>~30% Reduction (p &lt; 0.01)<\/strong><\/td>\n<\/tr>\n<tr>\n<td>10\u201315+ Years<\/td>\n<td>Plateau at ~30%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<p>This suggests a <strong>threshold effect<\/strong> after 5 years, where testosterone stabilizes at a chronically low level regardless of further endurance exposure.<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\"><span id=\"Endurance_Training_and_Low_Libido_Why_Does_This_Happen\"><strong>Endurance Training and Low Libido: Why Does This Happen?<\/strong><\/span><\/h2>\n<h3 class=\"wp-block-heading\"><span id=\"1_Testosterone_Suppression_from_Overtraining\"><strong>1. Testosterone Suppression from Overtraining<\/strong><\/span><\/h3>\n<p>Intense, prolonged endurance training is known to suppress testosterone production. Chronic exercise stress triggers a <strong>hormonal shift<\/strong>\u2014increasing cortisol (a stress hormone) while reducing reproductive hormones like testosterone.<\/p>\n<h4 class=\"wp-block-heading\"><span id=\"Consequences_include\"><strong>Consequences include:<\/strong><\/span><\/h4>\n<ul class=\"wp-block-list\">\n<li>Decreased libido and sexual performance<\/li>\n<li>Erectile dysfunction<\/li>\n<li>Mood disturbances, irritability, and depressive symptoms<\/li>\n<li>Impaired recovery and muscle loss<\/li>\n<\/ul>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h3 class=\"wp-block-heading\"><span id=\"2_Energy_Deficiency_and_RED-S\"><strong>2. Energy Deficiency and RED-S<\/strong><\/span><\/h3>\n<p>Endurance athletes often enter a state called <strong>Relative Energy Deficiency in Sport (RED-S)<\/strong>\u2014where the <strong>energy demands of training exceed food intake<\/strong>.<\/p>\n<h4 class=\"wp-block-heading\"><span id=\"In_Male_Athletes_RED-S_May_Result_In\"><strong>In Male Athletes, RED-S May Result In:<\/strong><\/span><\/h4>\n<ul class=\"wp-block-list\">\n<li>Low testosterone and low LH\/GnRH levels<\/li>\n<li>Decreased sperm production and libido<\/li>\n<li>Increased fatigue and impaired training adaptation<\/li>\n<li>Higher injury risk (e.g., stress fractures, immune suppression)<\/li>\n<\/ul>\n<p>RED-S isn\u2019t just about calorie intake\u2014it\u2019s about not having enough fuel left over after exercise to support normal body functions, including sexual function.<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\"><span id=\"Not_All_Exercise_Is_Bad_for_Libido\"><strong>Not All Exercise Is Bad for Libido<\/strong><\/span><\/h2>\n<p>It\u2019s important to clarify: <strong>moderate exercise supports healthy libido.<\/strong><\/p>\n<p>Benefits of balanced physical activity include:<\/p>\n<ul class=\"wp-block-list\">\n<li>Improved blood flow (essential for erectile function)<\/li>\n<li>Reduced stress and anxiety<\/li>\n<li>Higher confidence and body image<\/li>\n<li>Healthy testosterone regulation<\/li>\n<\/ul>\n<p>It\u2019s <strong><a href=\"https:\/\/fitnessprogramer.com\/how-do-you-know-if-youre-overtraining\/\" target=\"_blank\" rel=\"noreferrer noopener\">chronic overtraining<\/a><\/strong>\u2014particularly in endurance athletes\u2014that poses the risk.<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\"><span id=\"How_to_Train_Smarter_and_Protect_Sexual_Health\"><strong>How to Train Smarter and Protect Sexual Health<\/strong><\/span><\/h2>\n<h3 class=\"wp-block-heading\"><span id=\"1_Periodize_Your_Training_Cycle\"><strong>1. Periodize Your Training Cycle<\/strong><\/span><\/h3>\n<p>Avoid training at maximum intensity and volume every week. Implement <strong><a href=\"https:\/\/fitnessprogramer.com\/deload-week\/\" target=\"_blank\" rel=\"noreferrer noopener\">deload weeks<\/a><\/strong> every 4\u20136 weeks to reduce total training load by 40\u201360%.<\/p>\n<ul class=\"wp-block-list\">\n<li>Use <strong>polarized training<\/strong>: 80% low-moderate, 20% high-intensity<\/li>\n<li>Integrate <strong>recovery microcycles<\/strong> to reduce sympathetic stress<\/li>\n<\/ul>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h3 class=\"wp-block-heading\"><span id=\"2_Prioritize_Sleep_and_Circadian_Hygiene\"><strong>2. Prioritize Sleep and Circadian Hygiene<\/strong><\/span><\/h3>\n<p>Poor sleep decreases testosterone secretion and disrupts the HPG axis. Aim for:<\/p>\n<ul class=\"wp-block-list\">\n<li><strong>7\u20139 hours per night<\/strong><\/li>\n<li>Consistent sleep-wake times<\/li>\n<li>Reduction of blue light before bed<\/li>\n<\/ul>\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Sleep deprivation can reduce testosterone by <strong>10\u201315% in just one week<\/strong> (Leproult &amp; Van Cauter, 2011).<\/p>\n<\/blockquote>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h3 class=\"wp-block-heading\"><span id=\"3_Eat_Enough_to_Fuel_Training_and_Recovery\"><strong>3. Eat Enough to Fuel Training and Recovery<\/strong><\/span><\/h3>\n<p>Use tools like:<\/p>\n<ul class=\"wp-block-list\">\n<li><strong>Energy Availability (EA) equation<\/strong> = (Energy intake \u2013 Exercise energy expenditure) \/ FFM<\/li>\n<li>Maintain EA \u2265 45 kcal\/kg FFM\/day for hormonal balance<\/li>\n<li>Include sufficient carbs and fats for hormone production<\/li>\n<\/ul>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h3 class=\"wp-block-heading\"><span id=\"4_Listen_to_the_Warning_Signs\"><strong>4. Listen to the Warning Signs<\/strong><\/span><\/h3>\n<p>Common indicators of overtraining or RED-S impacting sexual health include:<\/p>\n<ul class=\"wp-block-list\">\n<li>Loss of spontaneous or morning erections<\/li>\n<li>Sudden drop in libido or sex drive<\/li>\n<li>Persistent fatigue or irritability<\/li>\n<li>Difficulty sleeping or recovering<\/li>\n<li>Decline in strength or endurance despite training<\/li>\n<\/ul>\n<p><strong>Action Step:<\/strong> If symptoms persist, seek a <strong>sports endocrinologist<\/strong> or a provider familiar with RED-S.<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\"><span id=\"Takeaway_Exercise_for_Performance_Not_at_the_Expense_of_Libido\"><strong>Takeaway: Exercise for Performance, Not at the Expense of Libido<\/strong><\/span><\/h2>\n<p>Moderate endurance training improves sexual health, but <strong>too much intensity and duration can harm it.<\/strong> As the research shows, men with the most demanding endurance routines were <strong>most likely to experience low libido<\/strong>.<\/p>\n<p>The key is balance\u2014train hard, recover well, eat enough, and keep an eye on how your body (and libido) responds. If you\u2019re an endurance athlete noticing changes in sexual function, it might be time to <strong>reassess your training load and recovery practices<\/strong>.<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<h2 class=\"wp-block-heading\"><span id=\"Sources_and_Further_Reading\"><strong>Sources and Further Reading<\/strong><\/span><\/h2>\n<ol class=\"wp-block-list\">\n<li><em>Hackney, A.C., Lane, A.R., Register-Mihalik, J., &amp; O\u2019Leary, C.B. (2017). Endurance Exercise Training and Male Sexual Libido. Med Sci Sports Exerc, 49(2):317\u2013323.<\/em><\/li>\n<li><em>Hackney, A.C. The Male Reproductive System and Endurance Exercise. Med Sci Sports Exerc, 40(8), 1385\u20131389.<\/em><\/li>\n<li><em>Hackney,\u00a0A.C., &amp;\u00a0Lane,\u00a0A.R.\u00a0(2018).\u00a0Low testosterone in male endurance-trained distance runners: Impact of years in training.\u00a0Hormones,\u00a017(1),\u00a0137\u2013139. PubMed ID: 29858867 doi:10.1007\/s42000-018-0010-z. <a href=\"http:\/\/scholar.google.com\/scholar_lookup?title=Low+testosterone+in+male+endurance-trained+distance+runners%3A+Impact+of+years+in+training&amp;author=A.C.+A.R.+Hackney+Lane&amp;publication_year=2018&amp;journal=Hormones%2C&amp;volume=17&amp;issue=1&amp;pages=137-139\" target=\"_blank\" rel=\"noreferrer noopener\">Search Google Scholar<\/a><\/em><\/li>\n<\/ol>\n<\/div>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3711241968723425\"\r\n     crossorigin=\"anonymous\"><\/script><br \/>\n<br \/><a href=\"https:\/\/fitnessprogramer.com\/endurance-training-and-low-libido\/\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Exercise is widely known to support heart health, boost mood, and enhance confidence. But what if too much of it\u2014especially endurance training like marathon running or cycling\u2014starts to interfere with your sex drive? Surprisingly, recent research shows that chronic, high-volume endurance exercise may reduce libido in men. The growing body of evidence, spearheaded by researchers &hellip;<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-14777","post","type-post","status-publish","format-standard","hentry","category-fitness"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/loudhdtv.com\/index.php?rest_route=\/wp\/v2\/posts\/14777","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/loudhdtv.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/loudhdtv.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/loudhdtv.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/loudhdtv.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=14777"}],"version-history":[{"count":0,"href":"https:\/\/loudhdtv.com\/index.php?rest_route=\/wp\/v2\/posts\/14777\/revisions"}],"wp:attachment":[{"href":"https:\/\/loudhdtv.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14777"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/loudhdtv.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14777"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/loudhdtv.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14777"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}