Multi-Omic Characteristics of Elite Taiwanese Endurance Athletes: An Integrative Study of Genetics, Gut Microbiota, and Metabolomics

Preface: A Scientific Bridge from the Laboratory to Taiwan’s Roads

What sets elite endurance athletes apart? The answer lies not in a single factor, but in the coordinated integration of multiple levels—genes, gut microbiota, and the metabolome. Multi-omics approaches allow us to view this “molecular landscape of superior performance.” This article integrates perspectives from exercise genetics, microbiology, and metabolomics to depict the multi-layered foundation of elite endurance performance, and looks ahead to opportunities for local research in Taiwan.

The Genetic Level: Polygenic Aerobic Aptitude

Elite endurance athletes tend to carry favorable variant combinations (higher polygenic scores) across multiple genetic loci related to aerobic capacity, involving mitochondrial function, oxygen transport (such as the EPAS1/HIF pathway), cardiovascular and metabolic systems. Studies such as HERITAGE show the heritability of training responses. But there is no single “champion gene”—it is the accumulation of many small-effect variants, combined with interactions with the training environment, that collectively shapes aerobic aptitude. Genes set the range of potential; training determines the degree to which it is realized.

The Gut Microbiota and Metabolic Levels

The gut microbiota of elite endurance athletes is highly diverse and rich in SCFA-producing and lactate-metabolizing bacteria (such as Veillonella), supporting energy supply, anti-inflammatory responses, and the intestinal barrier. At the metabolomic level, they exhibit superior metabolic flexibility—efficiently switching between carbohydrate and fat oxidation, strong lactate clearance and utilization, and high mitochondrial oxidative efficiency. These microbiota and metabolic characteristics are partly the result of training adaptation and partly may have innate foundations, interweaving with the genetic level to collectively support superior endurance metabolism.

The Value and Prospects of Multi-Omics Integration

Looking at any single level alone is insufficient to explain elite performance; only multi-omics integration can capture the full picture of gene × microbiota × metabolism × training interactions. This is valuable for understanding “how excellence is forged,” identifying targets for individualized training, and discerning the relative contributions of talent and environment. In the future, integrating multi-layered data could enable more precise guidance for individualized training and talent development. But it must be remembered: multi-omics depicts a complex integration—it is by no means a tool for “screening” or determining destiny, but rather a tool for understanding and optimization.

Metabolic Flexibility: The Hidden Advantage of Elite Endurance Athletes

A key advantage of elite endurance athletes is “metabolic flexibility”—the ability to efficiently switch between carbohydrate and fat oxidation according to exercise intensity. At low intensity, they prioritize fat oxidation to conserve precious glycogen; at high intensity, they flexibly draw on carbohydrates. Well-trained individuals can maintain higher fat oxidation at higher intensities (sparing glycogen), delaying “hitting the wall.” This flexibility stems from adaptations in mitochondrial density and function and enzyme systems; it is the product of long-term aerobic training and may also have a partial genetic basis. Metabolic flexibility links genes, mitochondria, and training—it is the integrated expression of multi-omics characteristics at the functional level. For endurance performance, good metabolic flexibility means higher fuel utilization efficiency and later exhaustion—a hidden advantage that distinguishes the elite from the average, and it is primarily shaped by training, meaning anyone can improve it through long-term aerobic training.

Nature and Nurture: An Integrated View of Talent and Training

The multi-omics characteristics of elite endurance performance ultimately point to an integrated view: excellence is the result of the synergy between “innate potential” and “acquired training”—neither is dispensable. Genes set the range of potential (such as genetic predispositions for mitochondrial efficiency and oxygen transport), but this potential must be realized through long-term, proper training; meanwhile, characteristics such as the microbiota and metabolic flexibility are substantially shaped by training and lifestyle. This explains why both “gifted but undertrained” and “hardworking but with limited potential” rarely reach the top—the elite need both. The takeaway for the vast majority of athletes is pragmatic: although we cannot choose our genes, the “acquired” factors—training, nutrition, recovery, and lifestyle—are the parts we can control and that yield enormous benefits, and most people are still far from their potential ceiling. Focusing on what is controllable is the true path to progress.

Ethics and Pragmatism in Multi-Omics Research on Elite Athletes

Multi-omics research on elite athletes carries both scientific value and ethical considerations. Scientifically, integrating genes, microbiota, and metabolism to depict the molecular basis of excellence helps us understand performance and guide training. But ethically, lines must be drawn: such research should be used for “understanding and optimizing training,” never for “talent screening” or “genetic determinism”—the molecular characteristics of elites are partly the result of long-term training rather than purely innate, and their predictive power for individuals is limited, insufficient as a basis for selection. On the pragmatic side, building local (Chinese-ethnicity) elite multi-omics data has value, filling the gap left by predominantly European and American datasets, but requires rigorous ethical standards, de-identification, and informed consent. For the general athlete, the message of such research is encouraging: excellence is the synergy of innate potential and acquired training, and the acquired factors—training, nutrition, recovery, and lifestyle—are the parts everyone can control and that yield enormous benefits. Focusing on what is controllable, rather than agonizing over unchangeable genes, is the true path to progress.

An Interdisciplinary Integrated Perspective: Multi-Omics Depicting the Panorama of Excellence

Research on the multi-omics characteristics of Taiwan’s outstanding endurance athletes is the ultimate integration of exercise genomics, microbiology, metabolic science, and systems biology, attempting to depict the molecular panorama of “how excellence is forged.” It reveals that elite performance lies not in a single factor, but in the coordinated integration of multiple levels—genes, gut microbiota, and the metabolome. The profundity of this interdisciplinary integration lies in its most comprehensive perspective on performance—innate potential and acquired training in synergy, multiple biological levels interwoven. From the genetic angle, polygenic aerobic aptitude sets the range of potential; from the microbiota angle, diverse, SCFA-producing microbiota support energy and anti-inflammation; from the metabolic angle, metabolic flexibility and lactate utilization underpin fueling efficiency; from the integrative angle, these levels interweave and are partly shaped by training. This perspective elevates athletic performance from a single-dimensional explanation to an emergent property of multi-layered coordination. It also points to a balanced conclusion: excellence requires both nature and nurture, and training and lifestyle are the controllable parts with enormous benefits. For Taiwan, building local elite multi-omics data has long-term value, filling the gap left by predominantly European and American datasets. Understanding the multi-omics panorama allows us to view excellence with an integrated, humble, and pragmatic attitude—it is multi-layered coordination, and the parts we can grasp deserve focused investment.

From Research to the Training Ground: An Action Framework from the Integrated Perspective

Guiding training from a multi-omics integrated perspective can follow the framework of “Understand the multi-layers—Focus on the controllable—Nurture microbiota and metabolism—Develop locally.” Understand the multi-layers: recognize that excellence is the result of multi-layered coordination among genes, microbiota, metabolism, and training, with no single determining factor; genes set the range of potential, but training, microbiota, and metabolic flexibility are substantially shaped by acquired factors. Focus on the controllable: place emphasis on the acquired factors that are controllable and yield enormous benefits—training, nutrition, recovery, and lifestyle—rather than agonizing over unchangeable genes; the vast majority of people are still far from their potential ceiling, leaving enormous room for effort. Nurture microbiota and metabolism: cultivate a healthy microbiota through a diverse diet and regular exercise, and enhance metabolic flexibility (efficient carbohydrate-fat fuel switching, lactate utilization) through long-term aerobic training—these are trainable elements of excellence. Develop locally: support local multi-omics research under rigorous ethical standards to fill the gap in Chinese-ethnicity data; but reject using multi-omics for talent screening (limited predictive power, some characteristics stem from training, and it violates ethics). The core of this framework is: understand with an integrated, pragmatic perspective that excellence is the result of multi-layered coordination, focus on the controllable and high-benefit aspects of training and lifestyle, nurture the microbiota and metabolic flexibility, and invest effort where change is possible—this is the true path to realizing potential.

Local Applications in Taiwan: Climate, Events, and Cultural Context

Taiwan possesses strong biomedical, information, and sports science capabilities. Building a multi-omics database of local elite endurance athletes holds long-term value—it can advance scientific understanding of exercise performance in the Chinese population, support local talent development, and enable individualized training. Most international multi-omics data are based on European and American athletes, and local Taiwanese data can fill this ethnic gap. A pragmatic approach involves industry-academia-research collaboration, rigorous ethical standards, and a focus on training optimization and health promotion rather than elite screening. For the average Taiwanese athlete, the takeaway from this multi-omics landscape is that excellence results from multi-level coordination—genes, microbiome, metabolism, and training are all indispensable—and among these, training and lifestyle are the aspects we can most control.

Taiwan has strong biomedical, information, and sports science capabilities. Building a multi-omics database of local elite endurance athletes holds long-term value, filling the gap in international data dominated by European and American populations and supporting local talent development. For the average Taiwanese athlete, the takeaway from the multi-omics landscape is that excellence results from multi-level coordination, and training and lifestyle are the aspects we can most control—focusing on these is the true path to improvement.

Common Questions and Myth Clarification

Myth 1: Elite microbiome/metabolic characteristics are purely innate? In part, they are shaped by long-term training and diet (e.g., metabolic flexibility, microbiome). Environmental factors have a major influence, and everyone can improve through training.

Myth 2: Can multi-omics screen for future champions? It cannot and should not. Individual predictive power is limited, elite characteristics partly stem from training, are insufficient for selection purposes, and doing so would violate ethical principles.

Myth 3: Without elite genes, progress is impossible? The vast majority of people are far from their potential ceiling. Training and lifestyle are controllable factors with enormous benefits.

How to Read Sports Science Research: Developing Evidence Literacy

This article cites four studies from leading international journals (such as Journal of Applied Physiology, Medicine & Science in Sports & Exercise, Sports Medicine, Nature, and Cell series), but as a reader, cultivating “evidence literacy” can help you absorb this knowledge more rationally rather than accepting it at face value. First, distinguish study types: randomized controlled trials (RCTs) have the strongest causal inference, observational studies (cohort, cross-sectional) can only show associations rather than causation, and animal and cellular studies reveal mechanisms but require caution when translating to humans. Second, pay attention to samples and contexts: results from small samples or specific populations (such as elite athletes or particular age groups) may not apply to you; studies predominantly based on European and American populations also require careful consideration regarding applicability to Taiwanese populations. Third, value effect size rather than just “statistical significance”: statistical significance does not equal practically meaningful benefit—you must ask “is this difference important in real training or health terms?” Fourth, be wary of over-extrapolation and commercialization: preliminary findings from single studies are often exaggerated into “miracle” products or methods; wait for replication and systematic reviews. Fifth, judge based on the “consistency” of mechanistic, associational, and interventional evidence, rather than rejecting everything due to flaws in a single study or accepting everything because of one impressive result. Sixth, understand that “individual variation” is the norm in sports science: the same intervention produces different responses in different people due to genetics, training background, lifestyle, and environment; studies present group averages, so when applying to yourself, carefully observe your own actual responses and adjust accordingly. Seventh, prioritize the “fundamentals”: sleep, nutrition, consistent training, and recovery—these have strong evidence support and clear benefits—should always take precedence over various novel supplements, equipment, or methods. Many seemingly sophisticated interventions offer marginal benefits far smaller than getting the basics right. Sports science is a constantly evolving field. Maintaining an open yet critical attitude, updating your knowledge as evidence evolves, respecting individual differences, and prioritizing fundamentals are what allow you to truly translate cutting-edge research from international journals into training and health decisions that are useful, safe, and sustainable long-term—rather than blindly following trends or deferring to a single authority.

Key Takeaways from This Article

Synthesizing the interdisciplinary research and mechanistic analyses above, the core points can be distilled as follows: Excellence is multi-level integration: genes, microbiome, metabolism, and training collectively shape endurance performance. There is no single champion gene: aerobic talent is the accumulation of polygenic small-effect variants. Training and lifestyle are the most controllable: the microbiome and metabolic flexibility can be shaped by training and diet. Local multi-omics data have value: filling the gap for the Chinese population and supporting local talent development. Multi-omics is a tool, not a verdict: used for understanding and optimization, never for screening or determining destiny. Behind these points lies the convergence of multiple fields—sleep science, immunology, genomics, neuroscience, microbiology, endocrinology, and data science—which together convey a core message: the benefits and adaptations of exercise are the integrated result of multiple body systems working in coordination, not something any single factor can encompass. Understanding this interdisciplinary, integrative perspective helps us move beyond fragmented, symptom-by-symptom thinking and approach training, recovery, and health more holistically. Only by incorporating these principles into daily training and life, and dynamically adjusting based on individual circumstances, actual responses, and professional advice, can we translate cutting-edge findings from top international journals into practices that are truly feasible, safe, and sustainable in Taiwan’s climate, event, and lifestyle contexts. The value of sports science ultimately lies in helping every athlete—elite or amateur, young or old—enjoy sport more intelligently, more healthily, and more joyfully, while achieving physical and mental growth through it.

Practical Recommendations for Taiwanese Athletes

1. Excellence is multi-level integration: Genes, microbiome, metabolism, and training collectively shape endurance performance.
2. There is no single champion gene: Aerobic talent is the accumulation of polygenic small-effect variants.
3. Training and lifestyle are the most controllable: The microbiome and metabolic flexibility can be shaped by training and diet.
4. Local multi-omics data have value: Filling the gap for the Chinese population and supporting local talent development.
5. Multi-omics is a tool, not a verdict: Used for understanding and optimization, never for screening or determining destiny.

Research Citations and Further Reading

• Bouchard, C., et al. (2011). Genomic predictors of maximal O2 uptake response to standardized exercise training. Journal of Applied Physiology, 110(5), 1160–1170.
• Scheiman, J., et al. (2019). Meta-omics analysis of elite athletes identifies a performance-enhancing microbe. Nature Medicine, 25, 1104–1109.
• Barton, W., et al. (2018). The microbiome of professional athletes differs from that of more sedentary subjects. Gut, 67(4), 625–633.
• Al-Khelaifi, F., et al. (2018). A pilot study comparing the metabolic profiles of elite-level athletes. Sports Medicine - Open, 4, 2.

This article is a translation of sports science knowledge. Individual physiological responses vary. For any training or intervention adjustments, please consult professional coaches and sports medicine physicians, and proceed gradually according to your personal health status.

Related Topic Readings

• Effects of Gut Microbiota on Endurance Exercise: New Research on Lactobacillus and Athletic Performance
• Effects of Exercise Training on Gut Microbiota Diversity: A Study on the Energy Benefits of Short-Chain Fatty Acids
• Association Between Gut Microbiota Composition and Endurance Performance: A Study on Energy Supply from Short-Chain Fatty Acids
• Systems Biology Approaches in Sports Science: A Study on Training Adaptations Through Multi-Omics Integration