{"id":387,"date":"2026-11-08T03:00:43","date_gmt":"2026-11-08T03:00:43","guid":{"rendered":"https:\/\/poshfitness.com\/blog\/2026\/11\/08\/testosterone-and-muscle\/"},"modified":"2026-11-08T03:00:45","modified_gmt":"2026-11-08T03:00:45","slug":"testosterone-and-muscle","status":"publish","type":"post","link":"https:\/\/poshfitness.com\/blog\/2026\/11\/08\/testosterone-and-muscle\/","title":{"rendered":"Testosterone and Muscle: What It Does and How to Support It"},"content":{"rendered":"<\/p>\n<p>Testosterone is one of the main hormonal signals that tells muscle to build and repair itself. When levels are adequate, resistance training and protein turn into muscle more efficiently. When levels fall well below normal, that process gets harder, and fat tends to creep in. You can support healthy testosterone with training, sleep, body composition and nutrition. If you suspect your levels are truly low, the answer is a morning blood test and a conversation with your physician, not a supplement.<\/p>\n<div data-blg-cta=\"after_tldr\" data-blg-cta-layout=\"banner\" style=\"margin:28px 0;font-family:-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;box-sizing:border-box;\">\n<div style=\"border-radius:26px;padding:min(22px,3.2vw);background:radial-gradient(circle at 100% 0%,#f4d8dd 0 150px,rgba(255,255,255,0) 151px),radial-gradient(circle at 0% 100%,#f4d8dd 0 130px,rgba(255,255,255,0) 131px),linear-gradient(180deg,#f7e5e8 0%,#fbf2f4 100%);\">\n<div style=\"background:#ffffff;border-radius:18px;box-shadow:0 12px 34px rgba(0,0,0,0.13);overflow:hidden;\">\n<div style=\"padding:34px 30px;text-align:center;\">\n<div style=\"margin:0 0 18px;\"><span style=\"display:inline-block;max-width:100%;box-sizing:border-box;border-radius:999px;padding:6px 13px;font-size:12px;font-weight:800;letter-spacing:0.1em;text-transform:uppercase;line-height:1.3;background:#C02942;color:#ffffff;\">Poshfitness<\/span><\/div>\n<div style=\"font-size:26px;font-weight:800;line-height:1.2;letter-spacing:-0.01em;color:#1f2937;margin:0;\">Train With Your Biology<\/div>\n<div style=\"width:56px;height:6px;border-radius:3px;background:#C02942;margin:12px 0 14px;margin-left:auto;margin-right:auto;\"><\/div>\n<div style=\"font-size:15px;line-height:1.55;color:#64748b;margin:0 0 24px;max-width:44em;margin-left:auto;margin-right:auto;\">Posh Fitness uses DNA analysis and bloodwork to shape personalized training and nutrition programs around your body.<\/div>\n<p><a href=\"https:\/\/poshfitness.com\" style=\"display:inline-flex;align-items:center;gap:9px;border-radius:10px;font-weight:700;font-size:15px;text-decoration:none;padding:13px 22px 13px 26px;background:#C02942;color:#ffffff;\">Explore personalized fitness<svg width=\"17\" height=\"17\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"#ffffff\" stroke-width=\"2.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"display:block;flex:0 0 auto;\"><path d=\"M5 12h14\"\/><path d=\"m12 5 7 7-7 7\"\/><\/svg><\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<h2 id=\"key-takeaways\" tabindex=\"-1\">Key Takeaways<\/h2>\n<ul>\n<li>Testosterone <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/41355050\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">stimulates muscle protein synthesis and blocks muscle-breakdown pathways<\/a>, which is why it matters for strength and lean mass.<\/li>\n<li>Levels drift down gradually with age, and the lifestyle factors you control (resistance training, sleep, body fat, diet) are the first lever to pull.<\/li>\n<li>Most over-the-counter \u201ctestosterone boosters\u201d <a href=\"https:\/\/www.nature.com\/articles\/s41443-023-00763-9\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">fail to raise total testosterone<\/a> in a systematic review, so training and body composition do more.<\/li>\n<li>Low testosterone is diagnosed only when symptoms and repeated low blood values appear together, so bloodwork comes before any decision.<\/li>\n<\/ul>\n<h2 id=\"table-of-contents\" tabindex=\"-1\">Table of Contents<\/h2>\n<ul>\n<li><a href=\"#how-testosterone-builds-and-maintains-muscle\">How testosterone builds and maintains muscle<\/a><\/li>\n<li><a href=\"#what-happens-to-testosterone-and-muscle-with-age\">What happens to testosterone and muscle with age<\/a><\/li>\n<li><a href=\"#testosterone-and-fat-loss\">Testosterone and fat loss<\/a><\/li>\n<li><a href=\"#what-testosterone-therapy-does-for-muscle\">What testosterone therapy does for muscle<\/a><\/li>\n<li><a href=\"#natural-ways-to-support-healthy-testosterone\">Natural ways to support healthy testosterone<\/a><\/li>\n<li><a href=\"#when-to-get-bloodwork\">When to get bloodwork<\/a><\/li>\n<li><a href=\"#our-perspective\">Our perspective<\/a><\/li>\n<li><a href=\"#train-around-your-own-biology\">Train around your own biology<\/a><\/li>\n<li><a href=\"#faq\">FAQ<\/a><\/li>\n<li><a href=\"#sources\">Sources<\/a><\/li>\n<\/ul>\n<h2 id=\"how-testosterone-builds-and-maintains-muscle\" tabindex=\"-1\">How testosterone builds and maintains muscle<\/h2>\n<p>Testosterone binds to androgen receptors in muscle cells. From there it does several things at once. According to a 2026 review in <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/41355050\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Endocrine Reviews and PubMed<\/a>, it increases the proliferation of muscle precursor cells, stimulates growth hormone and IGF-1 signaling, raises muscle protein synthesis and switches off genes that drive muscle atrophy.<\/p>\n<p>In plain terms, training creates the stimulus and testosterone helps the body respond to it. A specialist at the Hospital for Special Surgery explains that <a href=\"https:\/\/www.hss.edu\/health-library\/move-better\/muscle-mass-testosterone\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">testosterone helps generate the proteins that build muscle<\/a>, which in turn supports strength.<\/p>\n<p>Two details are worth knowing:<\/p>\n<ul>\n<li><strong>Fiber types.<\/strong> Testosterone treatment <a href=\"https:\/\/academic.oup.com\/edrv\/article-abstract\/47\/2\/280\/8373600\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">increases the size of both type 1 and type 2 muscle fibers<\/a> and raises muscle progenitor cell numbers, so the effect is not limited to one kind of training.<\/li>\n<li><strong>Building and breakdown.<\/strong> In healthy people, a 200 mg intramuscular dose of testosterone enanthate produced a <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC2439525\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">twofold increase in net protein synthesis<\/a> while protein breakdown stayed unchanged. The gain came from building more, not from breaking down less.<\/li>\n<\/ul>\n<p>This is also why testosterone is not a stand-in for training. The hormone amplifies the signal. Lifting, protein intake and recovery still supply it. If you want the training side in detail, <a href=\"https:\/\/gripnatic.com\/what-is-training-for-hypertrophy\" target=\"_blank\" rel=\"noopener\">hypertrophy training with weekly sets<\/a> is a good place to see how volume drives muscle growth.<\/p>\n<h2 id=\"what-happens-to-testosterone-and-muscle-with-age\" tabindex=\"-1\">What happens to testosterone and muscle with age<\/h2>\n<p>Muscle loss begins quietly. According to the same HSS specialist, people <a href=\"https:\/\/www.hss.edu\/health-library\/move-better\/muscle-mass-testosterone\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">lose about 3 to 5% of their muscle mass per decade<\/a> after 30. Nutrition and exercise can lessen that, but it gets harder as men age and testosterone declines faster.<\/p>\n<p>The decline rate is reported a little differently depending on the study:<\/p>\n<table>\n<thead>\n<tr>\n<th>Source<\/th>\n<th>What it reports<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC6119844\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">2018 review on testosterone and sarcopenia<\/a><\/td>\n<td>About 1% per year after age 30; roughly 40% to 70% of men older than 70 likely have low levels<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC9605266\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">2022 narrative review in older men<\/a><\/td>\n<td>Serum testosterone falls 2 to 3% annually, linked to late-onset hypogonadism symptoms<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The link to muscle is measurable. A 2025 review reports that a <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC11969971\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">50% decrease in free testosterone is associated with a 1.4-fold higher probability of frailty and a 1.55-fold higher risk of sarcopenia<\/a> in men. Age is not a diagnosis, though. Plenty of men in their 40s and 50s sit comfortably in the normal range, and fatigue at that age often has other causes. Our guide to <a href=\"https:\/\/poshfitness.com\/blog\/2026\/10\/24\/low-energy-at-40\" target=\"_blank\" rel=\"noopener\">low energy at 40<\/a> walks through those causes and the checks worth running.<\/p>\n<h2 id=\"testosterone-and-fat-loss\" tabindex=\"-1\">Testosterone and fat loss<\/h2>\n<p>The relationship between testosterone and body fat runs in both directions. A review of male obesity describes how <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3955331\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">rising body fat suppresses the hormonal axis that drives testosterone<\/a> through inflammatory signals and insulin resistance, while low testosterone in turn promotes more total and visceral fat. That loop explains why some men feel stuck: the harder fat loss gets, the lower testosterone can fall, and the reverse.<\/p>\n<p>The numbers are striking. In a 2016 review, <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC5054608\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">obese men had 30% lower total testosterone than lean men<\/a>, and 40% had levels below 12 nmol\/L. In obese men on a calorie-reduced diet, testosterone treatment added 2.9 kg of fat loss compared with placebo and protected lean mass.<\/p>\n<p>The encouraging part for anyone not on therapy is that weight loss itself helps. The Grossmann review found that <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3955331\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">losing more than 15% of body weight raised total testosterone by about 5.75 nmol\/L<\/a>, while smaller losses produced only modest gains of about 2 nmol\/L.<\/p>\n<p>The practical lesson: lose fat in a way that protects muscle. Aggressive crash dieting works against you. Our article on <a href=\"https:\/\/poshfitness.com\/blog\/2026\/10\/03\/body-recomposition-vs-weight-loss\" target=\"_blank\" rel=\"noopener\">body recomposition versus weight loss<\/a> explains how to aim for 1 to 2 pounds a week while keeping lean mass.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/poshfitness.com\/blog\/wp-content\/uploads\/2026\/11\/1793945707354_Testosterone-and-fat-loss.jpeg\" alt=\"Testosterone and fat loss\"><\/p>\n<h2 id=\"what-testosterone-therapy-does-for-muscle\" tabindex=\"-1\">What testosterone therapy does for muscle<\/h2>\n<p>Research on testosterone replacement therapy (TRT) gives a sense of how much muscle the hormone can influence. Results depend heavily on the formulation and the person.<\/p>\n<p>A 2018 meta-analysis by Skinner and colleagues found that <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC5989848\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">intramuscular TRT was associated with a 5.7% increase in fat-free mass and 10 to 13% strength gains<\/a>, while transdermal TRT was associated with a 1.7% increase in fat-free mass and 2 to 5% strength gains. Intramuscular delivery produced three to five times greater percent improvement.<\/p>\n<p>In older men, a 2015 meta-analysis found androgen therapy <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC4312307\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">increased lean body mass by 3.59 kg and reduced fat mass by 1.78 kg<\/a>. A more recent 2024 review reports a more modest figure, about 1.6 kg of added lean mass in older men, with <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC12087543\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">no consistent, meaningful change in strength, fatigue or cognition<\/a>. Early work using supraphysiologic doses reported much larger muscle gains, for example a <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/2917954\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">20% increase in muscle mass at 3 mg\/kg per week<\/a> in healthy men, but those are pharmacological doses, not what clinical care aims for.<\/p>\n<p>The takeaway: therapy can add lean mass in men who truly need it, and it works alongside training rather than replacing it. Whether it fits you is a medical decision.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/poshfitness.com\/blog\/wp-content\/uploads\/2026\/11\/1793945636895_What-testosterone-therapy-does-for-muscle.jpeg\" alt=\"What testosterone therapy does for muscle\"><\/p>\n<h3 id=\"who-qualifies-for-therapy\" tabindex=\"-1\">Who qualifies for therapy<\/h3>\n<p>The American Urological Association <a href=\"https:\/\/www.auanet.org\/guidelines-and-quality\/guidelines\/testosterone-deficiency-guideline\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">defines testosterone deficiency as both low levels and symptoms or signs<\/a> associated with low serum total testosterone. A number alone is not enough. A symptom alone is not enough either.<\/p>\n<p>A 2024 review in American Family Physician adds practical detail: a fasting morning level <a href=\"https:\/\/www.aafp.org\/afp\/2024\/0600\/testosterone-replacement-therapy-male-hypogonadism\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">below 300 ng\/dL (10.41 nmol\/L) should be repeated to confirm<\/a>, and baseline hematocrit and PSA should be checked before therapy is considered. The Endocrine Society likewise <a href=\"https:\/\/www.endocrine.org\/clinical-practice-guidelines\/testosterone-therapy\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">recommends diagnosing hypogonadism only with symptoms plus consistently low levels<\/a> and advises against routine screening of the general male population.<\/p>\n<h3 id=\"safety-and-monitoring\" tabindex=\"-1\">Safety and monitoring<\/h3>\n<p>If you and your physician consider therapy, these points matter:<\/p>\n<ul>\n<li>In February 2025, the FDA <a href=\"https:\/\/www.fda.gov\/drugs\/drug-alerts-and-statements\/fda-issues-class-wide-labeling-changes-testosterone-products\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">removed the boxed warning language about increased cardiovascular risk<\/a> from testosterone products and added blood-pressure labeling.<\/li>\n<li>A 2023 randomized trial found TRT <a href=\"https:\/\/www.aafp.org\/afp\/2024\/0600\/testosterone-replacement-therapy-male-hypogonadism\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">noninferior to placebo for major adverse cardiac events<\/a> in men aged 45 to 80 with hypogonadism and elevated cardiovascular risk.<\/li>\n<li>The Endocrine Society <a href=\"https:\/\/www.endocrine.org\/clinical-practice-guidelines\/testosterone-therapy\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">recommends against therapy<\/a> in men planning fertility soon, men with breast or prostate cancer, PSA above 4 ng\/mL, elevated hematocrit, untreated severe sleep apnea, uncontrolled heart failure, or a heart attack or stroke in the last 6 months.<\/li>\n<li>Testosterone, hematocrit and PSA should be <a href=\"https:\/\/www.aafp.org\/afp\/2024\/0600\/testosterone-replacement-therapy-male-hypogonadism\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">measured at baseline and at least annually<\/a> in men 40 and older on therapy.<\/li>\n<li>For men with age-related low testosterone, the American College of Physicians <a href=\"https:\/\/www.acpjournals.org\/doi\/10.7326\/M19-0882\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">suggests reevaluating symptoms within 12 months<\/a> and stopping if sexual function has not improved.<\/li>\n<\/ul>\n<p>These decisions belong with a urologist, endocrinologist or primary care physician. We work alongside your medical team and never replace it.<\/p>\n<h2 id=\"natural-ways-to-support-healthy-testosterone\" tabindex=\"-1\">Natural ways to support healthy testosterone<\/h2>\n<p>This is the part you control today. Be realistic about the goal: you are supporting your body\u2019s own production, not chasing a number.<\/p>\n<h3 id=\"lift-heavy-using-big-movements\" tabindex=\"-1\">1. Lift heavy, using big movements<\/h3>\n<p>Harvard Health notes that regular activity, particularly <a href=\"https:\/\/www.health.harvard.edu\/mens-health\/lifestyle-strategies-to-help-prevent-natural-age-related-decline-in-testosterone\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">moderate- or high-intensity resistance exercise involving large muscle groups<\/a> such as squats and bench presses, can increase testosterone. Build the week around compound lifts, progressive loading and enough weekly volume. Our guide to <a href=\"https:\/\/poshfitness.com\/blog\/2026\/10\/28\/exercise-for-longevity\" target=\"_blank\" rel=\"noopener\">exercise for longevity<\/a> shows how to set that up week by week.<\/p>\n<h3 id=\"manage-body-fat\" tabindex=\"-1\">2. Manage body fat<\/h3>\n<p>The same Harvard source says that losing weight through a <a href=\"https:\/\/www.health.harvard.edu\/mens-health\/lifestyle-strategies-to-help-prevent-natural-age-related-decline-in-testosterone\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">balanced diet and regular exercise can raise testosterone production by up to 30%<\/a>. Given the fat-and-testosterone loop above, this is often the most effective single change for men carrying extra weight around the middle.<\/p>\n<h3 id=\"protect-sleep-and-recovery\" tabindex=\"-1\">3. Protect sleep and recovery<\/h3>\n<p>If you are exhausted after every session, training harder will not help. Sleep, stress and under-eating all blunt recovery. Our <a href=\"https:\/\/poshfitness.com\/blog\/2026\/10\/01\/tired-after-workouts\" target=\"_blank\" rel=\"noopener\">checklist for feeling tired after workouts<\/a> lists what to adjust and four red flags that deserve a medical visit. Timing can matter for adherence too, and our piece on <a href=\"https:\/\/poshfitness.com\/blog\/2026\/10\/27\/morning-vs-evening-workout\" target=\"_blank\" rel=\"noopener\">morning versus evening workouts<\/a> helps you choose the slot you will keep.<\/p>\n<h3 id=\"eat-enough-protein-and-total-food\" tabindex=\"-1\">4. Eat enough protein and total food<\/h3>\n<p>Muscle building needs raw material. A protein-forward diet that does not undercut your calories supports both training adaptation and body composition. Extreme deficits tend to stall progress.<\/p>\n<h3 id=\"be-skeptical-of-boosters\" tabindex=\"-1\">5. Be skeptical of boosters<\/h3>\n<p>A 2023 systematic review in the International Journal of Impotence Research found that <a href=\"https:\/\/www.nature.com\/articles\/s41443-023-00763-9\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">most testosterone boosters failed to raise total testosterone<\/a>. The exceptions were \u03b2-hydroxy \u03b2-methylbutyrate and betaine, which may be effective for male athletes. Spend your money on food, coaching and lab work before any capsule.<\/p>\n<h2 id=\"when-to-get-bloodwork\" tabindex=\"-1\">When to get bloodwork<\/h2>\n<p>Consider testing if you have persistent low energy, reduced libido, loss of strength despite consistent training, or fat loss that has stalled for months. Those are also symptoms of thyroid issues, sleep apnea, anemia, high stress and under-recovery, which is why one hormone should not be the only question. Our <a href=\"https:\/\/poshfitness.com\/blog\/2026\/10\/21\/lab-markers-for-weight-loss\" target=\"_blank\" rel=\"noopener\">lab markers for weight loss<\/a> guide covers what a useful panel includes.<\/p>\n<p>For a clear read on testosterone, ask your physician for a fasting morning draw, and expect a repeat if the first value is low. Bring the results to us and we can build training and nutrition around them. If a thyroid problem is involved, our <a href=\"https:\/\/poshfitness.com\/blog\/2026\/10\/15\/hypothyroid-workout\" target=\"_blank\" rel=\"noopener\">hypothyroid workout guide<\/a> shows a safe way to start.<\/p>\n<h2 id=\"our-perspective\" tabindex=\"-1\">Our perspective<\/h2>\n<blockquote>\n<p>Most men who come to us are not asking about hormones first. They say they train, they eat reasonably well, and nothing moves. Testosterone is one piece of that picture, alongside sleep, metabolic health, inflammation and recovery.<\/p>\n<p>That is why we start with biology rather than a template. DNA analysis, bloodwork, gut microbiome testing and physical assessments show us where a person actually stands, and the training and nutrition plan follows from the data. Two men of the same age can need very different programs.<\/p>\n<p>We see resistance training and protein-forward nutrition as the foundation for muscle and healthy hormone signaling at any age. Where bloodwork suggests a medical question, we encourage you to take it to your physician, and we are glad to work alongside your doctor on the coaching side.<\/p>\n<p>Our goal is simple: help you regain the energy and strength you remember, and protect your healthspan along the way.<\/p>\n<p><em>Peter<\/em><\/p>\n<\/blockquote>\n<h2 id=\"train-around-your-own-biology\" tabindex=\"-1\">Train around your own biology<\/h2>\n<p>If you live in Fairfield County, Connecticut or Westchester County, New York, we bring personal training to your home, to affiliated gyms or to you virtually. Each plan starts from your own diagnostics, including DNA, bloodwork and gut microbiome testing, so the plan reflects your biology and not a generic template.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/poshfitness.com\/blog\/wp-content\/uploads\/2026\/09\/1790625849165_poshfitness.jpg\" alt=\"Poshfitness\"><\/p>\n<p>Options depend on how much support you want:<\/p>\n<ul>\n<li>A <a href=\"https:\/\/poshfitness.com\/DNA-fitness-coaching\/index.html\" target=\"_blank\" rel=\"noopener\">4-week DNA coaching program<\/a> or <a href=\"https:\/\/poshfitness.com\/longevity-coaching\/index.html\" target=\"_blank\" rel=\"noopener\">16-week premium coaching plan<\/a> for a structured, data-led reset.<\/li>\n<li>An <a href=\"https:\/\/poshfitness.com\/online-personal-training-program\/index.html\" target=\"_blank\" rel=\"noopener\">online personal fitness plan<\/a>, starting at $40 per month for the Starter plan, with the Truly Personal Plan at $99 per month.<\/li>\n<li>A <a href=\"https:\/\/poshfitness.com\/online-personal-training-program\/online-personal-trainer-packages.html\" target=\"_blank\" rel=\"noopener\">live virtual training session<\/a> at $80 for a one-off start.<\/li>\n<li>The Ultra Membership 5 a Week at $2,000 per month, listed on our <a href=\"https:\/\/poshfitness.com\/pricing.html\" target=\"_blank\" rel=\"noopener\">pricing page<\/a>.<\/li>\n<\/ul>\n<p>Ready to talk? <a href=\"https:\/\/poshfitness.com\/get-started-personal-trainer.html\" target=\"_blank\" rel=\"noopener\">Get started with an in-home personal trainer<\/a> in Fairfield County, or explore our <a href=\"https:\/\/poshfitness.com\/wtf-aging\/index.html\" target=\"_blank\" rel=\"noopener\">aging programs for men<\/a>. You can also look at <a href=\"https:\/\/poshfitness.com\/dna-test-systemage.html\" target=\"_blank\" rel=\"noopener\">DNA testing for SystemAge<\/a> to see how biological age data shapes a plan.<\/p>\n<h2 id=\"faq\" tabindex=\"-1\">FAQ<\/h2>\n<h3 id=\"does-testosterone-directly-build-muscle\" tabindex=\"-1\">Does testosterone directly build muscle?<\/h3>\n<p>Yes, it promotes muscle protein synthesis and the growth of muscle fibers by acting on androgen receptors. It works with training and nutrition, not instead of them. Without a lifting stimulus and enough protein, a normal testosterone level does not build much on its own.<\/p>\n<h3 id=\"can-i-raise-testosterone-naturally\" tabindex=\"-1\">Can I raise testosterone naturally?<\/h3>\n<p>You can support it. Resistance training with large movements, losing excess body fat, sleeping well and eating enough all help. Research shows <a href=\"https:\/\/www.nature.com\/articles\/s41443-023-00763-9\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">most commercial boosters do not raise total testosterone<\/a>, so focus on those habits first.<\/p>\n<h3 id=\"does-low-testosterone-make-fat-loss-harder\" tabindex=\"-1\">Does low testosterone make fat loss harder?<\/h3>\n<p>It can. Low testosterone promotes fat accumulation, especially visceral fat, and extra body fat can in turn suppress testosterone. Losing weight in a way that preserves muscle helps break that loop, and bloodwork can show whether your levels are actually low.<\/p>\n<h3 id=\"how-is-low-testosterone-diagnosed\" tabindex=\"-1\">How is low testosterone diagnosed?<\/h3>\n<p>Guidelines call for both symptoms and consistently low blood levels. A fasting morning total testosterone below 300 ng\/dL is typically <a href=\"https:\/\/www.aafp.org\/afp\/2024\/0600\/testosterone-replacement-therapy-male-hypogonadism\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">repeated to confirm the diagnosis<\/a>. Your physician makes the diagnosis and decides on any treatment.<\/p>\n<h3 id=\"is-testosterone-therapy-safe\" tabindex=\"-1\">Is testosterone therapy safe?<\/h3>\n<p>It depends on your health history. The FDA removed the boxed cardiovascular warning in 2025, but guidelines still list conditions where therapy is not recommended and call for regular monitoring. Discuss your own risks with your doctor.<\/p>\n<h2 id=\"sources\" tabindex=\"-1\">Sources<\/h2>\n<ul>\n<li><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/41355050\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Mechanisms of Testosterone\u2019s Anabolic Effects on Muscle (PubMed, 2026)<\/a><\/li>\n<li><a href=\"https:\/\/academic.oup.com\/edrv\/article-abstract\/47\/2\/280\/8373600\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Mechanisms of Testosterone\u2019s Anabolic Effects on Muscle (Endocrine Reviews)<\/a><\/li>\n<li><a href=\"https:\/\/www.hss.edu\/health-library\/move-better\/muscle-mass-testosterone\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">How Aging Affects Testosterone and Muscle Mass in Men (HSS)<\/a><\/li>\n<li><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC2439525\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Cellular and molecular mechanisms responsible for the anabolic actions of testosterone (PMC)<\/a><\/li>\n<li><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC6119844\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Testosterone and Sarcopenia (PMC, 2018)<\/a><\/li>\n<li><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC9605266\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Relationship between Testosterone and Sarcopenia in Older-Adult Men (PMC, 2022)<\/a><\/li>\n<li><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC11969971\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Androgens as the \u201cold age stick\u201d in skeletal muscle (PMC, 2025)<\/a><\/li>\n<li><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3955331\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Lowered testosterone in male obesity (PMC, 2014)<\/a><\/li>\n<li><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC5054608\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Effects of testosterone treatment on body fat and lean mass (PMC, 2016)<\/a><\/li>\n<li><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC5989848\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Muscular responses to testosterone replacement vary by administration route (PMC, 2018)<\/a><\/li>\n<li><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC4312307\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Effects of testosterone on lean mass gain in elderly men (PMC, 2015)<\/a><\/li>\n<li><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC12087543\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Testosterone supplementation for men (PMC, 2024)<\/a><\/li>\n<li><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/2917954\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Effect of testosterone on muscle mass and muscle protein synthesis (PubMed, 1989)<\/a><\/li>\n<li><a href=\"https:\/\/www.auanet.org\/guidelines-and-quality\/guidelines\/testosterone-deficiency-guideline\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Testosterone Deficiency Guideline (American Urological Association)<\/a><\/li>\n<li><a href=\"https:\/\/www.aafp.org\/afp\/2024\/0600\/testosterone-replacement-therapy-male-hypogonadism\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Testosterone Replacement Therapy for Male Hypogonadism (American Family Physician, 2024)<\/a><\/li>\n<li><a href=\"https:\/\/www.endocrine.org\/clinical-practice-guidelines\/testosterone-therapy\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Testosterone Therapy for Hypogonadism Guideline (Endocrine Society)<\/a><\/li>\n<li><a href=\"https:\/\/www.acpjournals.org\/doi\/10.7326\/M19-0882\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Testosterone Treatment in Adult Men With Age-Related Low Testosterone (American College of Physicians, 2020)<\/a><\/li>\n<li><a href=\"https:\/\/www.fda.gov\/drugs\/drug-alerts-and-statements\/fda-issues-class-wide-labeling-changes-testosterone-products\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">FDA class-wide labeling changes for testosterone products (2025)<\/a><\/li>\n<li><a href=\"https:\/\/www.health.harvard.edu\/mens-health\/lifestyle-strategies-to-help-prevent-natural-age-related-decline-in-testosterone\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Lifestyle strategies to help prevent natural age-related decline in testosterone (Harvard Health)<\/a><\/li>\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41443-023-00763-9\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">Do \u201ctestosterone boosters\u201d really increase serum total testosterone? (International Journal of Impotence Research)<\/a><\/li>\n<\/ul>\n<h2 id=\"recommended\" tabindex=\"-1\">Recommended<\/h2>\n<ul>\n<li><a href=\"https:\/\/poshfitness.com\/blog\/2026\/10\/14\/cardio-vs-weights-fat-loss\" target=\"_blank\" rel=\"noopener\">Cardio vs Weights: 2 Strength Days, Cardio First for Fat Loss<\/a><\/li>\n<li><a href=\"https:\/\/poshfitness.com\/blog\/2026\/10\/03\/body-recomposition-vs-weight-loss\" target=\"_blank\" rel=\"noopener\">Lose 1\u20132 lb\/week, Keep Muscle, Evidence: Body Recomp vs Weight Loss<\/a><\/li>\n<li><a href=\"https:\/\/poshfitness.com\/blog\/2026\/10\/10\/perimenopause-weight-loss\" target=\"_blank\" rel=\"noopener\">Perimenopause Weight Loss: Protect Muscle in 12 Weeks<\/a><\/li>\n<li><a href=\"https:\/\/poshfitness.com\/blog\/2026\/10\/25\/creatine-for-women\" target=\"_blank\" rel=\"noopener\">Creatine for Women: Dose, Benefits, Safety and Who Should Wait<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>How testosterone builds and protects muscle, what therapy trials show, which natural habits help, and when low levels warrant bloodwork and a doctor&#8217;s visit.<\/p>\n","protected":false},"author":1,"featured_media":388,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"pagelayer_contact_templates":[],"_pagelayer_content":"","footnotes":""},"categories":[26],"tags":[45,41,39,52],"class_list":["post-387","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fitness","tag-dna-testing","tag-greenwich-ct","tag-in-home-personal-training","tag-longevity"],"jetpack_featured_media_url":"https:\/\/poshfitness.com\/blog\/wp-content\/uploads\/2026\/11\/1793945585341_Man-bench-pressing-inside-a-strength-training-gym.jpeg","_links":{"self":[{"href":"https:\/\/poshfitness.com\/blog\/wp-json\/wp\/v2\/posts\/387","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/poshfitness.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/poshfitness.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/poshfitness.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/poshfitness.com\/blog\/wp-json\/wp\/v2\/comments?post=387"}],"version-history":[{"count":1,"href":"https:\/\/poshfitness.com\/blog\/wp-json\/wp\/v2\/posts\/387\/revisions"}],"predecessor-version":[{"id":391,"href":"https:\/\/poshfitness.com\/blog\/wp-json\/wp\/v2\/posts\/387\/revisions\/391"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/poshfitness.com\/blog\/wp-json\/wp\/v2\/media\/388"}],"wp:attachment":[{"href":"https:\/\/poshfitness.com\/blog\/wp-json\/wp\/v2\/media?parent=387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/poshfitness.com\/blog\/wp-json\/wp\/v2\/categories?post=387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/poshfitness.com\/blog\/wp-json\/wp\/v2\/tags?post=387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}