Bodyholic with Di | Your Health and Fitness Beyond Myths

The Gut-Muscle Axis: How Your Microbiome Dictates Your Gains

Di Katz Shachar, MPH Season 2 Episode 31

Text Di


The gut microbiome serves as a crucial regulator of muscle growth and fitness performance through nutrient absorption, inflammation control, and neurotransmitter production. Your digestive health creates a foundation for building muscle, improving recovery, and maintaining consistent training performance.

• Gut bacteria help break down proteins into amino acids essential for muscle development
• Healthy gut lining ensures efficient absorption of nutrients into the bloodstream
• Gut health significantly impacts body-wide inflammation that can hinder muscle recovery
• Research shows athletes possess more diverse gut microbiomes than non-athletes
• Your gut produces about 90% of your body's serotonin, affecting mood, sleep, and training consistency
• Aim to consume 30+ different plant foods weekly for optimal microbiome diversity
• Prioritize 25-35 grams of fiber daily from whole foods to fuel beneficial gut bacteria
• Incorporate prebiotic foods (garlic, onions, asparagus) and probiotic-rich foods (yogurt, kefir, kimchi)
• Stay hydrated with at least half your body weight in ounces of water daily
• Reduce gut irritants like excessive alcohol, caffeine, and ultra-processed foods

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Dai, Z., Wu, Z., Hang, S., Zhu, W., & Wu, G. (2015). Amino acid metabolism in intestinal bacteria and its potential implications for mammalian reproduction. Molecular Human Reproduction, 21(5), 389–409. https://doi.org/10.1093/molehr/gav003

Frampton, J., Murphy, K. G., Frost, G., & Chambers, E. S. (2021). Higher dietary fibre intake is associated with increased skeletal muscle mass and strength in adults aged 40 years and older. Journal of Cachexia Sarcopenia Muscle, 12(6), 2134–2144. https://doi.org/10.1002/jcsm.12820

Giron, M., Thomas, M., Dardevet, D., Chassard, C., & Savary-Auzeloux, I. (2022). Gut microbes and muscle function: Can probiotics make our muscles stronger? Journal of Cachexia Sarcopenia Muscle, 13(3), 1460–1476. https://doi.org/10.1002/jcsm.12964

Li, G., Jin, B., & Fan, Z. (2022). Mechanisms involved in gut microbiota regulation of skeletal muscle. Oxidative Medicine and Cellular Longevity, 2022, 2151191. https://doi.org/10.1155/2022/2151191

McKeown, N. M., Fahey, G. C., Jr., Slavin, J., & van der Kamp, J. W. (2022). Fibre intake for optimal health: How can healthcare professionals support people to reach dietary recommendations? BMJ, 378, e054370. https://doi.org/10.1136/bmj-2020-054370

Nogal, A., Valdes, A. M., & Menni, C. (2021). The role of short-chain fatty acids in the interplay between gut microbiota and diet in cardio-metabolic health. Gut Microbes, 13(1), 1–24. https://doi.org/10.1080/19490976.2021.1897212

Ross, R. E., VanDerwerker, C. J., Saladin, M. E., & Gregory, C. M. (2023). The role of exercise in the treatment of depression: Biological underpinnings and clinical outcomes. Molecular Psychiatry, 28(1), 298–328. https://doi.org/10.1038/s41380-022-01819-w

Sato, K., Hara-Chikuma, M., Yasui, M., Inoue, J., & Kim, Y. G. (2024). Sufficient water intake maintains the gut microbiota and immune homeostasis and promotes pathogen elimination. iScience, 27(6), 109903. https://doi.org/10.1016/j.isci.2024.109903


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Speaker 1:

Welcome back to Bodyholic with Dee. As usual, I'm your host, dee, and today we are unlocking a secret weapon in your fitness journey. But it's not really a secret anymore, but it is something you might not even realize is powerfully influencing your results your gut, ladies and gentlemen, your gut. Forget focusing on just the iron you pump and just the protein you down. We're going to get into and we're going to get into it deeply into the fascinating and increasingly understood connection between your gut health and your muscle development. Welcome to Bodyholic with Dee. No fads, just facts. I'm Dee and I'm here to help you ditch the noise and build a life you love. Let's go. Oh, but wait, I'm not a doctor, so use your common sense. Now let's dive in. Ever wondered why some individuals seem to pack on muscle and bounce back faster after workouts, even with similar routines? The answer, as emerging science reveals, might reside in the bustling ecosystem that lives right there within you. So in today's episode, we are going to explore the intricate gut muscle axis. Are going to explore the intricate gut muscle axis and we're going to uncover how your digestive system acts as a foundational pillar for nutrient absorption, hormonal balance and even your body's inflammatory responses. All these are critical players in muscle growth and recovery. And then we're going to get into how we can really arm ourselves with actionable gut-friendly strategies to optimize this connection and truly fuel our fitness from within. Literally, think of your gut as a dynamic metropolis teeming with trillions of microorganisms, bacteria, fungi, viruses and more, and this incredibly diverse community. Your gut microbiome, is far more than just a digestion facilitator it's a key regulator for your overall health and, surprisingly, for your muscular prowess. So a thriving gut microbiome plays a vital role in breaking down the food you consume, including proteins, into the essential building blocks for your muscles amino acids. While the initial breakdown starts in your stomach and small intestine, your gut bacteria contributes to further processing and influencing the ultimate availability of these crucial components. And I'm going to take it a step further A healthy gut lining that is nurtured by a balanced microbiome ensures that these amino acids are efficiently absorbed into your bloodstream to reach those amazing, hard-working muscles of yours. Okay, now listen up.

Speaker 1:

Your gut health significantly impacts inflammation levels throughout your body. An imbalanced gut can lead to increased intestinal permeability, sometimes called leaky gut, allowing inflammatory molecules to enter circulation, and this systemic inflammation can hinder muscle protein synthesis and therefore impede recovery after intense exercise. Are you with me? How it's unbelievably so deeply connected. Our bodies are amazing, so let's keep going. The communication that's between your gut and your muscles is really an incredibly fascinating two-way street.

Speaker 1:

Research is increasingly highlighting direct and indirect pathways through which your gut microbiome influences your overall muscular system, and so studies actually suggest that certain gut bacteria produce metabolites like short chain fatty acids, which can enter the bloodstream and potentially influence muscle metabolism directly. Some research even indicates a link between specific microbial compositions and muscle mass development, seemingly independent of just diet and exercise alone. You need a minute, trust me. You need a minute Now. It's also been observed that athletes often possess a more diverse gut microbiome compared to non-athletes. This is amazing, guys, are you with me? And this diversity has been correlated with improved athletic performance and faster recovery times. So let me put it in a different way. This suggests a beneficial interplay between a rich inner ecosystem and physical capability. Now, beyond the direct metabolic links, your gut is a major producer of neurotransmitters and, most notably, we're talking about around 90% of your body's serotonin. This crucial chemical plays a significant role in regulating mood and sleep and appetite All foundational elements for maintaining the consistency and mental fortitude needed to really stick to a demanding fitness routine. Oh my God, this is. I hope you're really taking all this in because it's freaking mind-blowing all this in because it's freaking mind-blowing. Now let's translate all the science that I just threw at you into practical steps that you can take literally right now to cultivate a gut environment that really supports your muscle building and your overall fitness goals.

Speaker 1:

So the first thing is aim for a vibrant array of whole foods, especially a wide spectrum of plant-based options. Remember that research indicates that individuals consuming over 30 different plant foods weekly walk around boasting a more diverse and resilient gut microbiome a more diverse and resilient gut microbiome. And it's important to also prioritize that the 25 to 35 grams of fiber daily from fruits, vegetables, whole grains and legumes, because the fiber acts as a primary fuel source for your beneficial gut bacteria and promoting the beneficial gut bacteria growth and their activity. And I'm not going to talk about probiotics, the supplement, but incorporating prebiotic rich foods like garlic, onions, leeks, asparagus yes bananas, oats these are basically specialized fibers that really benefit the microbes in your gut. And so introducing probiotic rich fermented foods, such as yogurt with live and active cultures, like kefir, sauerkraut, kimchi I also drink kombucha. These can help introduce beneficial bacteria to your gut. So remember that as these probiotics digest prebiotics, they produce beneficial postbiotic compounds.

Speaker 1:

Now, hydration is essential for a healthy gut environment. You want to aim for at least half your body weight in ounces of water daily to support the protective mucus lining of your intestines and efficient nutrient transport. Nutrient transport, gut irritants, excessive alcohol, excessive caffeine, ultra processed foods can negatively impact your microbiome balance and potentially hinder recovery from training sessions. So it's clear that optimizing your gut health is not just about comfortable digestion, but it's a fundamental pillar for maximizing your fitness potential. And by nurturing your inner ecosystem, you can enhance nutrient absorption, combat inflammation, improve recovery and build a stronger, healthier you. So go ahead literally this second and start incorporating the gut-friendly strategies into your routine and pay attention to how your body responds. You might be surprised by the positive ripple effect on your energy levels and also on your recovery and even your mood.

Speaker 1:

And, of course, I want you to share your experiences with me. You can DM me on Instagram, tag me using the hashtag bodyholicgutmuscle. You know all that good stuff. So thank you. Thank you for tuning in to Bodyholic with Dee, and the key takeaway is that true strength really starts from within and, like I said a few times quite literally, so until next time, keep nourishing your body and your inner ecosystem and everything that comes with that. You're just going to feel good overall. Hey, thanks so much for tuning in and if this hit home, please share it with your crew. Likes, comments, shares. Show your loved ones you care.