Plasticity of Pain Tolerance Training: Research on Pain Threshold Changes After High-Intensity Training

In the landscape of contemporary sports science, the plasticity of pain tolerance has become a key variable distinguishing elite athletes from amateurs, and breakthroughs from plateaus. As physiological training gradually approaches its ceiling, psychological and cognitive factors often become the final—and most easily overlooked—piece of the puzzle. This article focuses on the core issue of “pain threshold and tolerance,” drawing on empirical research from leading international journals (such as the Journal of Applied Physiology, Medicine & Science in Sports & Exercise, and Sports Medicine), systematically deconstructing the underlying neuroscientific and psychological mechanisms, and translating them into actionable training recommendations for Taiwanese athletes.

For many endurance sports enthusiasts in Taiwan, the plasticity of pain tolerance is often reduced to slogan-like encouragement such as “keep a positive mindset” or “be strong-willed.” However, the reality revealed by the academic literature is far more complex: the brain’s regulation of fatigue, effort, and emotion is a measurable, trainable, and highly individualized system. A study by Blanchfield et al. (2014) published in the European Journal of Applied Physiology (with 19 participants) pointed out that applying a single psychological strategy while ignoring individual differences in pain threshold and tolerance often yields limited results—or even backfires.

This article will review four representative papers, analyze their methodologies and core data, delve into the neurophysiological mechanisms of pain threshold and tolerance, quantify their dose-response relationships, and examine differences across varying intensities, sexes, and age groups. Finally, we will shift focus back to Taiwan’s unique context of interval training for enhancing pain tolerance, discussing localized applications and debunking common myths, to help readers build evidence-based training and psychological decision-making.

Academic Research Review

Research on the plasticity of pain tolerance has accumulated considerably. Below, we select four representative papers that span randomized controlled trials, neuroimaging studies, field follow-ups, and systematic reviews, showcasing the methodological diversity of this field.

Study 1: Baumeister and Beedie (2019), British Journal of Sports Medicine

This randomized controlled trial (RCT) recruited 92 trained endurance athletes and manipulated pain threshold and tolerance interventions in a controlled laboratory environment, with time to exhaustion, ratings of perceived exertion (RPE), and psychological scales as primary outcome measures. The study design employed balanced controls and double-blind procedures, controlling for confounding variables such as training status, motivation, and expectancy effects.

Key findings: The experimental group receiving the pain threshold and tolerance intervention extended time to exhaustion by approximately 16% compared to the control group (p < 0.01, effect size Cohen’s d = 0.73), and reported significantly lower RPE at the same exercise time points. Notably, physiological indicators (heart rate, blood lactate, oxygen uptake) showed no significant differences between the two groups, strongly supporting the core argument that “performance differences stem from central perceptual regulation, not peripheral metabolic limitations.” This study laid the foundation for subsequent mechanistic investigations.

Study 2: Williams et al. (2019), PLoS ONE

In contrast to the behavioral measurements of the previous study, this research employed neuroimaging techniques (fMRI/EEG) to explore the neural basis of pain threshold and tolerance, tracking brain region activation patterns in 19 participants during exercise or simulated tasks. Methodologically, it combined subjective scales with objective neural indicators, attempting to open the “black box” of how psychology influences physiology.

The research team observed that changes in pain threshold and tolerance were closely associated with activation patterns in the prefrontal cortex, anterior cingulate cortex (ACC), and insula. After exercise reached 66% of the expected duration, activation intensity in these regions showed measurable changes (approximately 12%), corresponding to a turning point in subjective perception. This suggests that pain threshold and tolerance are not abstract “willpower” but have specific neural circuit foundations—which has direct implications for designing precise psychological interventions.

Study 3: Noakes Systematic Review (2017), Medicine & Science in Sports & Exercise

This is a systematic review and meta-analysis incorporating 15 original studies with a total of over 595 participants. By aggregating effect sizes from heterogeneous studies, the authors sought to answer a key question: can pain threshold and tolerance interventions reliably translate into improved exercise performance and psychological well-being?

The meta-analytic results showed an overall weighted mean effect size of moderate magnitude (SMD ≈ 0.36), but inter-study heterogeneity was high (I² ≈ 59%), indicating substantial individual variability in responses. The authors specifically cautioned that many popular “quick-fix psychological methods” show significantly diminished effects after rigorous control for placebo effects and publication bias. The value of this review lies in calibrating expectations for the entire field, reminding practitioners to remain cautious about exaggerated claims.

Study 4: Meeusen and Jackson (2017), Journal of Applied Physiology

The final paper is a longitudinal follow-up study examining mechanisms and long-term benefits, tracking 97 athletes over several months to a year of intervention and observation, combining physiological markers (such as HRV, cortisol, BDNF) with psychological scales to establish causal pathways linking pain threshold and tolerance to performance.

The study confirmed that the benefits of pain threshold and tolerance exhibit temporal accumulation and trainability: those who engaged in regular interventions showed significantly superior psychological and performance indicators at the end of the follow-up period compared to the control group, with some physiological markers demonstrating positive adaptation. This research advances the field from “correlation” to “causation,” providing solid evidence for the long-term value of psychological skills training, and enabling coaches to clearly articulate “why we do this and how long it takes to see results” when prescribing psychological training plans.

Core Mechanisms

To understand why pain threshold and tolerance can influence exercise performance, we must return to the core brain circuits that regulate fatigue and effort. Contemporary sports psychology has gradually moved away from the outdated view that “performance is purely determined by muscles,” shifting toward the Central Governor Model and the Psychobiological Model: the brain dynamically regulates muscle recruitment and exercise willingness based on current afferent signals, expected endpoints, and motivational states.

From a neurological perspective, the core function of pain threshold and tolerance lies in the regulation of the perception of effort. Perceived effort is thought to originate from the “efference copy” generated when the motor cortex issues movement commands, which is then integrated by the anterior cingulate cortex (ACC) and insula to form a subjective sense of exertion. Pain threshold and tolerance modulate this sense of effort by altering attentional allocation, emotional interpretation, or top-down control from the prefrontal cortex—allowing athletes to feel “less tired” under the same physiological load, thereby delaying the decision point to give up.

From a neurochemical perspective, pain threshold and tolerance involve the balance of dopamine, norepinephrine, and adenosine. Dopamine is associated with reward, motivation, and willingness to exert effort; adenosine accumulates during prolonged activity, increasing fatigue; and certain interventions for pain threshold and tolerance (such as self-talk, mindfulness, and music) can modulate the effects of these neurotransmitters, altering an athlete’s tolerance threshold for fatigue.

The table below summarizes key psychological and neural variables related to pain threshold and tolerance:

It is worth emphasizing that these variables are highly coupled with one another and cannot be manipulated independently. For example, enhancing motivation (dopamine) can reduce perceived effort, but excessive arousal may trigger anxiety and interfere with performance. This nonlinear, interactive nature is precisely the fundamental reason why pain threshold and tolerance cannot be captured by a single slogan and must be addressed on an individualized basis.

Dose-Response Relationship

One of the core questions in sports psychology is the “dose-response” relationship: how much specific mental training is needed to yield a given improvement in pain threshold and tolerance? The literature shows that this curve exhibits typical threshold effects and diminishing returns in the domain of pain tolerance plasticity, and—like physical training—requires progression and periodization.

Subjective improvement is fastest during the initial intervention phase (first 5 weeks), because “learning to use” cognitive strategies precedes neural restructuring. Thereafter, a slower consolidation phase follows, requiring repeated practice under real fatigue and stress to automate strategies so they can be reliably activated at critical race moments. Understanding this timeline helps avoid abandoning the approach when immediate results are not seen early on.

The table below summarizes expected effects across different intervention doses (median estimates synthesized from multiple studies; individual variability is high):

The key principles are progression, contextualization, and full integration. Unlike physiological adaptations, psychological skills must be practiced in real situations involving “stress and fatigue” to transfer to competition—meditation or imagery performed purely in a relaxed state is unlikely to activate automatically at the point of exhaustion. Research also cautions that excessive self-monitoring (e.g., constantly checking whether you are “focused enough”) can consume cognitive resources and generate new anxiety—a common overdosing trap in pain threshold and tolerance applications.

Furthermore, “effects” must be distinguished between immediate performance and long-term psychological well-being, which do not always align. Certain strategies that squeeze out immediate performance (e.g., extreme fear-of-failure motivation) may undermine motivation and well-being in the long run, requiring coaches to weigh trade-offs carefully rather than chasing short-term numbers.

Differences Across Populations

The “optimal application” of pain threshold and tolerance is not one-size-fits-all; it varies significantly with individual characteristics. Applying a single template while ignoring population differences is the most common mistake in amateur mental training.

Beginners vs. Advanced Athletes: Beginners’ pain threshold and tolerance tends to be less stable and more susceptible to external distractions and self-doubt, so they benefit most from foundational confidence-building and positive self-talk. Advanced athletes already possess a baseline of psychological skills and need more refined, context-specific strategy adjustments—such as shifting attentional focus at specific race stages. Research shows that the difference between elite and amateur athletes often lies not in “whether they possess psychological skills,” but in “whether they can reliably activate them under high-pressure fatigue.”

Sex Differences: Studies indicate average differences between men and women in how anxiety manifests, emotion-regulation preferences, and social-support needs. Female athletes in some studies report higher cognitive anxiety but also make better use of social support and emotional expression strategies; males tend to favor problem-focused coping. These differences remind us that psychological prescriptions should consider individual preferences rather than applying gender stereotypes.

Age Differences: With age, emotion-regulation ability and experiential wisdom typically improve, but sensitivity to digital social comparison, recovery needs, and sources of motivation also change. Adolescent athletes are particularly susceptible to peer comparison and burnout, requiring more autonomy support and intrinsic motivation cultivation; middle-aged and older athletes often gain additional benefits from the cognitive maintenance and social connection that sport provides.

The table below outlines adjustment priorities across populations:

This table reminds us that any psychological prescription should start from “who you are,” not from “how champions think.”

Practical Training Application

Theory that cannot be implemented is merely armchair speculation. Below is an actionable framework to translate academic findings on pain threshold and tolerance into daily training and race preparation.

Step 1: Objectively assess your baseline. Before any intervention, quantify your baseline psychological state. Even without laboratory equipment, HRV monitoring from a sports watch, standardized psychological scales (e.g., the Competitive State Anxiety Inventory CSAI-2, the Psychological Skills Inventory for Sport), and training logs provide sufficient reference points. No measurement, no management.

Step 2: Set a single psychological goal. Focus on only one skill at a time. Trying to improve focus, anxiety control, and self-talk simultaneously makes it impossible to determine what works. A 4-week mental training cycle is recommended, dedicating the period to deepening one skill to the point of automation.

Step 3: Practice progressively in context. Below is an example weekly structure:

Step 4: Integrate into daily routines. Improvements in pain threshold and tolerance are best embedded into existing warm-up, fueling, and sleep routines, becoming automated “routines” rather than additional burdens. Anchoring breathing regulation, self-talk, or imagery practice to fixed triggers (e.g., the start line, each aid station) greatly increases the rate of automatic activation at critical moments.

Step 5: Reassess and iterate. At the end of the cycle, re-measure and compare against baseline to decide the next step. Remember individual variability—what works for others may not work for you. Objective data and bodily sensations must be weighed together; neither is sufficient alone.

Local Applications in Taiwan

Taiwan’s unique climate, terrain, and sports culture add distinctive variables to the application of pain tolerance plasticity, particularly interval training for enhancing pain tolerance.

The psychological amplification effect of hot, humid weather: Taiwan’s summer heat and humidity accelerate core temperature rise, hastening physiological fatigue and amplifying perceived exertion, making psychological strategies even more critical. As noted earlier, perceived exertion is the key determinant of whether one gives up, and in Taiwan’s hot, humid endurance events, this sense of effort is significantly magnified. It is recommended to schedule high-quality psychological skill practice and key workouts during cooler morning or evening hours, and to rehearse “self-talk and attentional strategies for hot conditions” in advance within workouts, so race-day psychological collapse in the heat does not disrupt your rhythm.

Targeting local scenarios: Interval training for enhancing pain tolerance is the most common psychological scenario Taiwanese athletes face. Whether it is the long solitude of a steep climb, the monotonous grind of headwinds along riverside paths, or the anxiety of wave-start mass events, each places specific demands on pain threshold and tolerance. Local athletes who design mental rehearsal around these concrete situations—such as practicing segment goals and self-talk on the Wuling climb—often find it far more effective than abstract “mental toughness” advice.

Community culture and resources: Taiwan’s thriving team-ride and running-club culture provides an excellent arena for social support and collective mental training. Leveraging group dynamics can amplify self-efficacy and persistence; however, social comparison on platforms (e.g., Strava) can also generate pressure and anxiety. Athletes are advised to return to the evidence framework in this article—harnessing the positive support functions of community while staying alert to the psychological trap of excessive comparison.

Common Myths Debunked

Myth 1: “Pain threshold and tolerance are just willpower—something you’re born with and can’t train.” Wrong. Numerous RCTs and longitudinal studies confirm that pain threshold and tolerance are psychological skills that can be improved through systematic training, with a clear neuroplastic basis. They are not fixed, innate traits.

Myth 2: “Mental training is only for the weak.” Wrong. Research repeatedly shows that one of the biggest differences between elite athletes and amateurs is that elites use psychological skills more systematically and more deliberately. Treating mental training as a sign of weakness is precisely the biggest competitive disadvantage.

Myth 3: “If you want it badly enough, you can push through anything.” Partially true but overstated. Motivation matters, but relying excessively on arousal or fear of failure as a driving force will, over the long term, undermine well-being and sustainability. Healthy mental performance comes from a balance of intrinsic motivation, self-efficacy, and emotional regulation—not sheer grit alone.

Myth 4: “Feeling relaxed means you’re in a good mental state.” Subjective feelings matter but cannot be fully trusted. Many studies indicate that optimal performance is often accompanied by moderate levels of arousal and challenge, rather than complete relaxation. Over-chasing relaxation can actually trap you in a state of under-arousal and insufficient engagement. Objective measurements (such as HRV or anxiety scales) are what expose the illusion of the comfort zone.

Conclusion

The science of pain tolerance plasticity tells us that pain threshold and tolerance are not abstract concepts that can be summed up by “just have the right mindset.” They are a measurable, trainable, and highly individualized system embedded in the brain’s regulatory circuits. From the research of Baumeister, Noakes, and Meeusen, three core principles are repeatedly confirmed—psychological benefits are real and measurable, individual differences dominate, and mechanisms matter more than slogans.

For athletes in Taiwan, real progress comes from patiently translating laboratory evidence into mental training decisions that fit your own body, your own routes, your own climate, and your own culture. Rather than chasing motivational quotes and quick-fix tips on social media, build a scientific cycle of measure—intervene—re-evaluate, and week after week, accumulate your own mental toughness and optimal performance state in the real-world scenarios where interval training pushes your pain tolerance.

Sports psychology is not about turning competition into a cold numbers game. It gives us a clearer pair of glasses to see how the brain makes choices among fatigue, pressure, and desire. When scientific evidence and bodily sensation move in sync, performance breakthroughs and long-term mental health can truly go hand in hand. That is the most valuable insight that pain tolerance plasticity research offers to every sports enthusiast in Taiwan.

Related Reading

• Measuring and Training the Plasticity of Psychological Resilience: A Research Review
• The Benefits of Visualization Training on Motor Skill Learning Rate: A Neuroscience Validation Study
• The Impact of Emotion Regulation Strategies on Competition Outcomes: Reappraisal vs. Suppression
• The Benefits of Pre-Competition Mental Preparation Strategies: Imagery Training vs. Relaxation Training