Running a marathon is often seen as the pinnacle of physical accomplishment—a triumph of willpower and strength.
But for some runners, the finish line doesn’t bring elation. It brings emptiness, anxiety, and even depression.
A growing body of research suggests that the intense physical and mental toll of endurance events may be affecting athletes in unexpected and deeply personal ways.
From strained relationships to lingering melancholy and identity crises, the darker side of marathon running is coming into focus.
In this article, we’ll explore why some long-distance runners are feeling worse, not better—and what can be done about it.
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Why marathon runners may not always feel mentally stronger
Running is often credited with boosting mental health, but new research is revealing that high-mileage training might do the opposite for some. A landmark study published in Acta Psychologica found that 25% of recreational marathoners exhibited “worryingly high” levels of anxiety and depression.
The study was led by Leo Lundy, a veteran of over 400 marathons himself, who wanted to understand why emotional crashes seemed so common after races he personally loved. Surprisingly, despite nearly all runners believing the sport benefited their wellbeing, tests showed otherwise for many.
“Multi-marathoners generally experience slightly higher levels of depression and anxiety compared to the general population,” Lundy reported.
The emotional crash after race day
Finishing a marathon should feel euphoric—but that high might be fleeting. A 2024 study from Linnaeus University described the post-race phase as emotionally turbulent. Subjects reported feelings of “ambivalence, melancholy, and energy loss” in the days following major endurance events.
This emotional whiplash isn’t just mental—it’s physical. After months of relentless training and a taxing race, the body’s reserves are completely drained. Hormones like cortisol and adrenaline spike, then plummet, leaving many runners feeling low and fatigued.
Though often unspoken, this suppressed period of mood disturbance can color future training cycles and overall mental health, especially when ignored.
When running becomes a coping mechanism
Many runners use training as an outlet for stress, grief, or anxiety. While this can be therapeutic, it may also become a crutch—a form of avoidance rather than processing. Lundy explained it plainly: “For some runners, the habit becomes more of a coping mechanism than a joy.”
That distinction matters. The belief that pushing harder will magically quiet inner turmoil often leads runners deeper into obsessive training loops, rather than helping them confront what’s truly going on.
Unlike casual exercisers, endurance athletes easily slip into overtraining, which can inflame both physical injury and emotional burnout.
Completing a marathon can become part of someone’s identity. It’s a source of pride, belonging, and social validation—especially with communities built around Strava segments, running clubs, and personal bests.
But for some, this identity starts replacing other essential roles: partner, parent, friend. The term “divorce by marathon” has surfaced in social circles, echoing research showing that endurance sport can strain romantic relationships. Partners may feel sidelined by missed dinners, worn-out weekends, and low emotional availability.
“There are three of us in this marriage and one of them is your Strava,” one exasperated spouse told their runner partner.
This sense of emotional disconnect—paired with physical depletion—creates the perfect storm for post-race dissatisfaction or even mood disorders.
Neurochemical highs … followed by empty lows
Much has been said about the famed “runner’s high”—the rush of endorphins and endocannabinoids that can leave athletes feeling invincible. But these feel-good chemicals don’t last forever, and for many, reality sets in hard afterward.
“I must admit, a certain emptiness creeps in after a while,” one runner confessed. The euphoria fades, leaving behind fatigue and sometimes sadness—especially when the next race isn’t scheduled yet.
Mental health experts warn that using racing as the sole source of emotional gratification increases the risk of depressive episodes when that outlet is removed, whether due to injury, weather, or life changes.
How runners can protect their mental health
None of this suggests marathon running is inherently harmful. In fact, endurance sports continue to offer significant physical, emotional, and social benefits—when balanced correctly.
Here are strategies runners can use to support their mental wellness:
- Prioritize recovery: Mental rest is as important as physical rest. Build recovery weeks and mental health days into every training block.
- Reconnect with loved ones: Deliberately schedule quality time with friends, partners, and family outside of running contexts.
- Diversify your identity: Avoid defining yourself solely by your athletic achievements. Explore hobbies, work aspirations, or social causes that light you up.
- Consider therapy: If recurring low moods or anxieties persist, talking to a professional can bring clarity, healing, and perspective.
- Reflect rather than deflect: Ask why you’re drawn to the distance and what you hope it will give you beyond the medal.
Running should add to your life—not replace your life. For most people, it still can. But chasing miles without mindfulness can turn an uplifting ritual into an emotional trap.
The bottom line
Marathon runners are often portrayed as iron-willed optimists. But behind the finish-line smiles are athletes wrestling with real emotional challenges. For some, running becomes not a joy but a shield—one that eventually cracks.
“Marathon runners should prioritize enjoyment, recovery and relationships to protect their mental health,” said Lundy. By seeing running not as an escape but as part of a healthy, whole lifestyle, runners can truly go the distance—mentally and physically.
