The Gut-Performance Connection

Product Description

A Gut Bacterium Can Make You Run 13% Further. Are You Managing the Organ That Could Be Your Competitive Edge?

In 2019, a Harvard research team analysed the gut microbiomes of Boston Marathon runners before and after the race. The most dramatically enriched species post-race: Veillonella atypica — a bacterium that converts exercise-generated lactate into propionate, providing additional fuel and reducing the accumulation of the metabolite that limits endurance performance. Germ-free mice colonised with V. atypica ran 13% longer on exhaustion tests than controls. The elite athlete’s microbiome is not incidental to their performance. It is a co-author of it.

The Gut-Performance Connection is the final guide in the Gut-Brain Series — bringing the microbiome, gut-brain, and immune gut science of Guides 1–3 into the performance context that matters for athletes and high-output professionals alike.

What This Guide Covers

Chapter 1 — Exercise Physiology and the Gut: How gut blood flow changes across exercise intensities (up to 80% reduction at VO2max). The migrating motor complex and gut housekeeping. The acute hormonal gut effects of exercise — cortisol, motilin, GLP-1, PYY, adrenaline. What happens to the gut during ultra-endurance events.

Chapter 2 — The Performance Microbiome: What is different about elite athlete microbiomes — diversity, Veillonella atypica, Akkermansia muciniphila, Prevotella, Faecalibacterium prausnitzii. The VO2max-Akkermansia correlation. Can you train your microbiome for performance? The dietary strategies for Veillonella, Akkermansia, and F. prausnitzii support.

Chapter 3 — Exercise-Induced Gut Permeability: Splanchnic ischaemia as the mechanism. The I-FABP marker. Evidence: serum LPS post-marathon, lactulose:mannitol during exercise, heat amplification. The management protocol — gut training, carbohydrate supplementation, zinc carnosine, L-glutamine, probiotics for barrier protection.

Chapter 4 — GI Symptoms in Athletes: Prevalence by sport (30–50% of marathon runners, 60–70% of Ironman participants). Upper GI management — nausea, reflux, pre-competition vomiting. Lower GI management — runner’s diarrhoea, cramping. The pre-competition 48–72 hour low FODMAP protocol. Why NSAIDs before exercise are one of the most modifiable GI risk factors in sport.

Chapter 5 — Nutrition and the Gut: Pre-exercise timing and composition. Gut training for carbohydrate tolerance — SGLT1 upregulation, the multiple-transporter approach to 90g/hour, the 8-week progressive gut training protocol. Post-exercise nutrition for gut recovery. Fibre periodisation — when to maximise prebiotic intake and when to reduce it.

Chapter 6 — Probiotics and Supplements: Lactobacillus rhamnosus GG for respiratory infection prevention (training continuity). Specific strains for gut permeability reduction. The full athlete gut protection stack — L-glutamine, zinc carnosine, tart cherry, omega-3, curcumin. Anti-doping certification guidance (Informed Sport, NSF Certified for Sport).

Chapter 7 — Gut Health for the High-Stress Professional: The physiological equivalence of overtraining and chronic occupational stress on the gut. The professional’s gut burden — caffeine, alcohol, business travel, sedentary patterns. The high-impact, low-effort gut-performance protocol ranked by impact-to-effort ratio for time-constrained professionals.

Chapter 8 — The 12-Week Gut-Performance Protocol: Four phases — foundation, gut training, competition/performance, assessment — with a complete 12-week weekly calendar. Sport-specific adaptations for marathon, Ironman, team sports, and strength training. Overtraining syndrome and the gut — the case study of the professional triathlete with OTS.

Who This Guide Is For

• Endurance athletes who experience GI symptoms during training or competition
• Athletes who have never systematically trained their gut for intra-exercise nutrition
• High-performance professionals who want the gut-performance framework applied to cognitive and professional output
• Anyone who has had a race or training block derailed by gut symptoms they couldn’t explain or manage
• Coaches and sports nutritionists wanting the complete gut-performance evidence base

What Makes This Different

This guide covers the Veillonella study in full mechanistic detail. It covers Jeukendrup’s gut training research and why SGLT1 upregulation is a trainable adaptation. It covers overtraining syndrome as a gut permeability disease. It covers heat acclimatisation and its gut implications. It covers the anti-doping certification requirements that recreational athletes ignore at their peril. This is the guide that tells athletes not just what to eat — but why their gut responds to training the way it does, and how to change it.

65 pages. Evidence-based. Instant PDF download.

30-Day Satisfaction Guarantee

Not satisfied? Full refund within 30 days.

SEO TITLE: The Gut-Performance Connection – Evidence-Based Athletic Gut Health Guide | 65pp PDF SEO META: The complete gut health guide for athletes — covering exercise-induced gut permeability, the performance microbiome (Veillonella), gut training for carbohydrate tolerance, probiotics for sport, and the 12-week Gut-Performance Protocol. FOCUS KEYPHRASE: gut health athletes performance

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SHORT DESCRIPTION: All four Gut-Brain Series guides in one bundle — The Microbiome Blueprint, Digestion Mood and the Gut-Brain Connection, Food Sensitivities and the Immune Gut, and The Gut-Performance Connection. 260 pages of evidence-based gut health science. Instant PDF download.

LONG DESCRIPTION:

The Complete Evidence-Based Framework for Gut Health, Performance and Mental Wellbeing — All Four Guides in One Bundle

The gut is the most complex and most consequential system in the body outside the brain. It houses 70–80% of your immune system. It produces 90–95% of your serotonin. It communicates continuously with your brain through 500 million enteric neurones and 80% of vagal traffic that flows upward — gut to brain. It contains a microbial ecosystem of 38 trillion organisms whose metabolic output shapes your inflammatory set point, your metabolic flexibility, your resilience to infection, and your mood. And it is the most commercially exploited, most misunderstood, and most under-managed system in health.

The Gut-Brain Series Complete Bundle provides the evidence-based framework for managing it systematically — across all four dimensions of gut health that matter for performance, health, and longevity.

The Four Guides

Guide 1 — The Microbiome Blueprint (65pp)

The foundational science: what lives in your gut, what it produces, and how to cultivate it. The 30-plant strategy, SCFA science, fermented foods, probiotics, prebiotics, the Veillonella-lactate story, and the 12-week Microbiome Optimisation Protocol.

Guide 2 — Digestion, Mood and the Gut-Brain Connection (65pp)

The neurogastroenterology: the enteric nervous system, IBS and its gut-brain mechanism, gut-driven depression and anxiety, psychobiotics, serotonin, and the 12-week Gut-Brain Optimisation Protocol. Covers gut-directed hypnotherapy (70–75% IBS response rate), the SMILES dietary depression trial, and the psychobiotic strains with the strongest human evidence.

Guide 3 — Food Sensitivities and the Immune Gut (65pp)

The immune science: what testing works and what doesn’t (including a clear statement on IgG4 food sensitivity panels), coeliac disease, FODMAP, histamine intolerance, leaky gut mechanisms, oral tolerance, and the gold-standard elimination and reintroduction protocol.

Guide 4 — The Gut-Performance Connection (65pp)

The performance science: exercise-induced gut permeability, the elite athlete microbiome, gut training for carbohydrate tolerance, GI symptoms in sport, probiotics for athletes, and the 12-week Gut-Performance Protocol with sport-specific adaptations.

How the Guides Work Together

The Gut-Brain Series is a system, not a collection. Guide 1 builds the microbiome diversity that Guide 4’s performance protocol depends on. Guide 2’s gut-brain stress management reduces the cortisol-driven permeability that Guide 3’s immune gut chapter addresses. Guide 3’s food sensitivity management works better within the microbiome and barrier context that Guides 1 and 2 build. Each guide is complete on its own — and more powerful as part of the whole.

What You Get

• 260 pages of evidence-based gut health science across four comprehensive guides
• 12-week protocols for microbiome optimisation, gut-brain health, food sensitivity management, and athletic gut performance
• Self-assessment tools, tracking worksheets, symptom scoring systems, and annual review checklists
• The complete supplement reference — strain-specific probiotics, prebiotic dosing, the athlete gut protection stack, and the clinical reference for each intervention
• Case studies including the executive with IBS-D, the student with gut-driven depression, and the triathlete with overtraining gut syndrome

Who This Bundle Is For

• Anyone who wants the complete evidence-based gut health framework, not individual guides
• Individuals managing multiple gut conditions simultaneously (IBS + food sensitivities + mood impact)
• Athletes who want both the performance microbiome and the gut-brain mental performance application
• Health professionals wanting a comprehensive client resource across the gut health spectrum
• Anyone who has tried individual supplements, diets, or approaches without a systematic framework

260 pages. Four complete guides. Instant PDF download.

30-Day Satisfaction Guarantee

If the Gut-Brain Series Complete Bundle does not deliver the gut health understanding and practical protocol you were looking for, contact us within 30 days for a full refund. No questions asked.

SEO TITLE: Gut-Brain Series Complete Bundle – 4 Evidence-Based Gut Health Guides | 260pp PDF SEO META: The complete Gut-Brain Series — four evidence-based guides covering the microbiome, gut-brain axis, food sensitivities, and athletic gut performance. 260 pages. Instant PDF download. FOCUS KEYPHRASE: gut health guide bundle