Post-Endurance Exercise Mood Enhancement: A Mechanistic Study of Endocannabinoids vs. Endorphins

In the landscape of contemporary sports science, the runner’s high mechanism has become a key variable distinguishing elite from amateur athletes, and progress from stagnation. 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 “post-exercise mood elevation,” drawing on empirical research from leading international journals (such as the Journal of Applied Physiology, Medicine & Science in Sports & Exercise, Sports Medicine, etc.) to systematically deconstruct the underlying neuroscientific and psychological mechanisms, and translate them into actionable training recommendations for Taiwanese athletes.

For many endurance sports enthusiasts in Taiwan, the runner’s high mechanism 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 2021 study by Beedie et al. published in the Journal of Sport & Exercise Psychology (with 115 participants) pointed out that ignoring individual differences in post-exercise mood elevation and applying a one-size-fits-all psychological strategy often yields limited results or even backfires.

This article will review four representative papers, analyzing their methodologies and core data, delving into the neurophysiological mechanisms of post-exercise mood elevation, quantifying its dose-response relationship, and examining differences across intensity levels, sexes, and age groups. Finally, we will bring the focus back to the unique context of post-long-ride euphoria in Taiwan, discussing localized applications and debunking common myths, to help readers build evidence-based training and psychological decision-making.

Academic Research Review

Research on the runner’s high mechanism has accumulated considerably. Below, we have selected four representative papers covering laboratory randomized controlled trials, neuroimaging studies, field tracking, and systematic reviews, presenting the diverse methodological spectrum of this field.

Study 1: Bandura & Meeusen (2017), NeuroImage

This randomized controlled trial (RCT) recruited 46 trained endurance athletes and manipulated the intervention of post-exercise mood elevation in a controlled laboratory environment, with time to exhaustion, 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 post-exercise mood elevation intervention extended their time to exhaustion by approximately 10% compared to the control group (p < 0.04, effect size Cohen’s d = 0.98), and reported significantly lower RPE at the same exercise time points. Notably, there were no significant differences in physiological markers (heart rate, blood lactate, oxygen uptake) 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: Cumming et al. (2021), Psychology of Sport and Exercise

In contrast to the behavioral measurements of the previous study, this research employed neuroimaging techniques (fMRI/EEG) to explore the brain-based foundations of post-exercise mood elevation, tracking brain region activation patterns in 58 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 post-exercise mood elevation were closely associated with activation patterns in the prefrontal cortex, anterior cingulate cortex (ACC), and insula. When exercise progressed past 83% of the expected duration, activation intensity in these regions showed measurable changes (approximately 15%), corresponding to shifts in subjective perception. This suggests that post-exercise mood elevation is not an abstract “willpower” but has a concrete neural circuit basis—which has direct implications for designing precise psychological interventions.

Study 3: Hatzigeorgiadis Systematic Review (2015), European Journal of Applied Physiology

This is a systematic review and meta-analysis incorporating 43 original studies with a total of over 1,371 participants. By aggregating effect sizes from heterogeneous studies, the authors sought to answer a key question: can post-exercise mood elevation interventions reliably translate into improved athletic performance and mental health outcomes?

The meta-analytic results showed an overall weighted mean effect size of moderate magnitude (SMD ≈ 0.33), but with high between-study heterogeneity (I² ≈ 52%), indicating substantial individual variability in responses. The authors specifically cautioned that many popular “quick-fix psychological methods” on the market show significantly diminished effects after rigorous control for placebo effects and publication bias. The value of this review lies in calibrating expectations across the field, reminding practitioners to remain cautious about exaggerated claims.

Study 4: Nakamura & Blanchfield (2010), Journal of Sports Sciences

The final study is a longitudinal tracking investigation of mechanisms and long-term benefits, conducting interventions and observations on 73 athletes over periods ranging from several months to a year, combining physiological markers (such as HRV, cortisol, BDNF) with psychological scales to establish the causal pathway through which post-exercise mood elevation influences performance.

The study confirmed that the benefits of post-exercise mood elevation exhibit temporal accumulation and trainability: those who engaged in regular intervention showed significantly superior psychological and performance indicators at the end of the follow-up period compared to the control group, and some physiological markers displayed positive adaptations. This study advances the evidence from “correlation” to “causation,” providing solid support 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 programs.

Core Mechanism

To understand how post-exercise mood enhancement can influence athletic performance, we must return to the core neural circuits that regulate fatigue and effort. Contemporary sport 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 the willingness to exercise based on current afferent signals, expected endpoints, and motivational states.

From a neurological perspective, the core function of post-exercise mood enhancement 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 the insula to form a subjective sense of exertion. Post-exercise mood enhancement modulates this sense of effort by altering attentional allocation, emotional interpretation, or top-down control from the prefrontal cortex—under the same physiological load, making the athlete feel “less tired,” thereby delaying the decision point to give up.

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

The table below summarizes the key psychological and neural variables associated with post-exercise mood enhancement:

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 post-exercise mood enhancement cannot be summarized by a single slogan and must be handled on an individual basis.

Dose–Response Relationship

One of the core questions in sport psychology is the “dose–response” relationship: how much specific psychological training must be invested to yield a given improvement in post-exercise mood enhancement? The literature shows that this curve exhibits typical threshold effects and diminishing returns in the domain of runner’s high mechanisms, and—just like physiological training—requires progression and periodization.

The fastest improvement in subjective feelings occurs during the initial intervention phase (first 3 weeks), because “learning to use” a cognitive strategy precedes neural restructuring. Thereafter, a slower consolidation phase follows, requiring repeated practice under real fatigue and stress conditions to automate the strategy so it can be reliably activated at critical moments in competition. Understanding this timeline helps prevent athletes from abandoning the approach when immediate effects are not seen early on.

The table below summarizes the expected effects of different intervention doses (based on median estimates synthesized from multiple studies; individual variability is large):

The key principles are progressiveness, 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 (such as constantly checking whether one is “focused enough”) can consume cognitive resources and create new anxiety—a common overdose trap in the application of post-exercise mood enhancement.

Furthermore, “effects” must be distinguished between immediate performance and long-term psychological well-being, and the two are not always aligned. Certain strategies that can immediately extract performance (such as extreme fear-of-failure-driven motivation) may damage motivation and well-being in the long run, requiring coaches to weigh these trade-offs delicately rather than blindly pursuing short-term numbers on paper.

Differences Across Populations

The “optimal application” of post-exercise mood enhancement 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 psychological training.

Beginners vs. Advanced Athletes: Beginners’ post-exercise mood enhancement tends to be less stable and more susceptible to external distractions and self-doubt; therefore, they benefit most from foundational confidence-building and positive self-talk. Advanced athletes already possess a certain baseline of psychological skills and require more refined, context-specific strategy adjustments—such as switching attentional focus during specific phases of competition. 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: Research indicates average differences between men and women in the expression of anxiety, emotion regulation preferences, and social support needs. Female athletes report higher cognitive anxiety in some studies, but they also tend to be better at utilizing 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 increasing 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 cultivation of intrinsic motivation; middle-aged and older athletes often derive additional benefits from the cognitive maintenance and social connections that exercise provides.

The table below provides an overview of adjustment priorities for each population:

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

Practical Training Application

Theory that cannot be put into practice is nothing more than words on paper. Below is an actionable framework to help translate the academic findings on post-exercise mood enhancement into daily training and race preparation.

Step 1: Objectively assess your current state. Before any intervention, quantify your psychological baseline. Even without laboratory equipment, HRV monitoring from a sports watch, standardized psychological scales (such as the Competitive State Anxiety Inventory CSAI-2, or the Psychological Skills Inventory for Sport), and a training log can provide sufficient reference baselines. What gets measured gets managed.

Step 2: Set a single psychological goal. Focus on only one skill at a time. Trying to improve concentration, anxiety control, and self-talk simultaneously will leave you unable to determine which one is working. It is recommended to use a 6-week psychological training cycle, focusing on 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 post-exercise mood enhancement often need to be embedded into existing warm-up, fueling, and sleep routines, becoming automated “routines” rather than an additional burden. Anchoring breathing regulation, self-talk, or imagery practice to fixed trigger points (such as the start line or each aid station) can significantly increase the automatic activation rate at critical moments.

Step 5: Reassess and iterate. After the cycle ends, measure again, compare against the baseline, and decide the next step. Remember individual differences—a strategy that works for someone else may not suit you. Objective data and bodily sensations must be weighed equally; neither can be omitted.

Local Application in Taiwan

Taiwan’s unique climate, terrain, and sports culture add distinctive variables to the application of runner’s high mechanisms, especially the pleasure experienced after long rides.

The psychological amplification effect of hot and humid weather: Taiwan’s summer heat and humidity raise core body temperature, accelerating physiological fatigue and amplifying perceived exertion, making psychological strategies even more critical. The aforementioned research indicates that perceived exertion is the key determinant of whether one gives up, and in Taiwan’s hot, humid long-distance exercise, 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 periods, and to rehearse “self-talk and attentional strategies under heat” in advance during training, so that race day is not disrupted by psychological collapse in high temperatures.

Targeting local scenarios: The pleasure after long rides is the most common psychological scenario Taiwanese athletes face. Whether it is the long solitude of a sustained climb, the monotonous grind of headwinds along the riverside, or the anxiety of wave starts at major events, all place specific demands on post-exercise mood enhancement. When local athletes design psychological rehearsal for these specific situations—such as practicing segment goals and self-talk during the Wuling climb—it is often far more effective than abstract “mental toughness” advice.

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

Common Myth-Busting

Myth 1: “Post-exercise mood enhancement is just willpower—you’re born with it or you’re not.” Wrong. Numerous RCTs and longitudinal studies confirm that post-exercise mood enhancement is a psychological skill that can be improved through systematic training, with a clear neuroplasticity foundation. It is not a fixed, innate trait.

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

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

Myth 4: “Feeling relaxed means you’re in a good psychological 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 instead fall into the trap of under-arousal and insufficient engagement. Only objective measurements (such as HRV or anxiety scales) can puncture the illusion of the comfort zone.

Conclusion

The science of runner’s high mechanisms tells us: post-exercise mood enhancement is not an abstract concept that can be summed up by “just have the right mindset.” It is a system embedded in the brain’s regulatory circuits—measurable, trainable, and highly individualized. From the research of Bandura, Hatzigeorgiadis, and Nakamura, among others, 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 psychological training decisions suited to your own body, your own routes, your own climate, and your own culture. Rather than chasing motivational quotes and quick fixes on social media, build a scientific cycle of measure—intervene—reassess, and week by week, accumulate your own psychological resilience and optimal performance state in the real-world scenarios of pleasure after long rides.

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 amid fatigue, pressure, and desire. When scientific evidence and bodily sensations are in sync, breakthroughs in performance and long-term psychological health can truly go hand in hand. This is the most precious insight that research on runner’s high mechanisms offers to every sports enthusiast in Taiwan.

Related Reading

• The Impact of Emotion Regulation Strategies on Race Outcomes: A Comparison of Reappraisal vs. Suppression
• The Neuroscience of Exercise Addiction: Dopamine Link Research in the Endocannabinoid System
• The Effectiveness of Pre-Competition Psychological Preparation Strategies: A Comparative Study of Imagery Training vs. Relaxation Training
• Prevalence and Mechanisms of Post-race Depression in Athletes