The runner’s high is real. That light, almost euphoric feeling that can wash over you mid-run isn’t just something coaches talk about to keep you moving. It’s a well-documented physiological response that can make running feel effortless, even addictive.
For years, it was dismissed as a myth—something elusive and impossible to explain. But more recent research has changed that.
Scientists have identified the chemical and neurological processes behind it, showing that runner’s high is driven not just by endorphins, but also by endocannabinoids—compounds that affect mood, stress, and perception in powerful ways.
What’s even more interesting is that this state isn’t reserved for elite runners or rare, perfect days. With the right intensity, duration, and conditions, it’s something many runners can tap into.
Understanding how and why it happens can help you train smarter, enjoy your runs more, and maybe even chase that feeling on purpose.
What Is The Runner’s High?
The runner’s high is a feeling of elation brought on by continuous exercise, created when the body releases a combination of endorphins and endocannabinoids.1Fuss, J., Steinle, J., Bindila, L., Auer, M. K., Kirchherr, H., Lutz, B., & Gass, P. (2015). A runner’s high depends on cannabinoid receptors in mice. Proceedings of the National Academy of Sciences, 112(42), 13105–13108. https://doi.org/10.1073/pnas.1514996112
It can vary in its intensity and effects, but a typical runner’s high includes:
- Feelings of elation, exhilaration, calm, and positive vibes
- Reduced levels of stress
- Less awareness of pain or discomfort.
This feeling isn’t exclusive to running; it can be attained through other forms of continuous strenuous exercise. It’s most commonly associated with running, as the conditions of going for a run well suit the required state to induce it.
The runner’s high is one of many neurobiological effects of physical exercise (i.e., how exercise can change your brain state).
It’s also relatively short-term. The euphoric peak typically lasts 20–30 minutes, and the broader sense of calm and well-being tends to fade within a few hours of finishing your run.
Some runners describe a gentle letdown afterward—a dip in mood or energy—as those chemical levels normalize. This is normal, and one reason consistent running tends to produce more lasting mood benefits than a single session.
What Causes A Runner’s High?
The runner’s high occurs entirely in your brain. It’s triggered by a flood of neurochemicals that kick in after a sustained bout of physical exercise.
Endorphins
Endorphins are your body’s homemade opioids, which act similarly to morphine in the way they reduce pain and produce feelings of pleasure.
These chemicals originate in the central nervous system and pituitary gland and are sensed by the brain’s prefrontal and limbic regions—the same areas that respond to other strong emotions, like love.
When those regions receive more endorphins, the feeling of euphoria intensifies. The harder and longer you run, the more endorphins are released.
Endorphins are produced in response to pain and discomfort, helping to numb those sensations so the body can continue functioning. In this sense, they’re also natural painkillers.
That said, more recent research suggests that endorphins can’t do the job alone. They’re relatively large molecules that struggle to cross the blood-brain barrier on their own. That’s where endocannabinoids come in.
Endocannabinoids
Your body produces its own cannabinoid compounds—endocannabinoids—that activate the same receptors as THC, the active compound in cannabis. (Put simply, cannabis works by mimicking chemicals your body already makes naturally.)
Endocannabinoids create sensations of calm and tranquility, relaxing the mind and reducing unnecessary muscle tension.
The most researched endocannabinoid is called anandamide, which binds to cannabinoid receptors throughout your central nervous system. Physical stress triggers its release, which modulates pain neurons in your spine and raises your pain tolerance threshold.
Contrary to earlier assumptions, recent research suggests that endocannabinoids may play a more important role in the runner’s high than endorphins.
In one notable experiment, some participants took a drug that blocks the effects of endorphins before running on a treadmill. They reported just as strong a runner’s high as those who took nothing, pointing to endocannabinoids as the primary driver.2Siebers, M., Biedermann, S. V., Bindila, L., Lutz, B., & Fuss, J. (2021). Exercise-induced euphoria and anxiolysis do not depend on endogenous opioids in humans. Psychoneuroendocrinology, 126, 105173. https://doi.org/10.1016/j.psyneuen.2021.105173
Dopamine
Dopamine is a third piece of the puzzle, and one that’s easy to overlook. This neurotransmitter is central to your brain’s reward and motivation systems.
During a run, dopamine contributes to the sense of pleasure and anticipation that can make the experience feel genuinely rewarding—not just during the high itself, but in the hours and days after, reinforcing the desire to run again. It’s one reason running can become habit-forming in the best possible way.
Why Does The Runner’s High Exist?
The prevailing theory is that our bodies evolved these responses to endure pain and discomfort when survival demanded it.
Our ancestors spent long days hunting, sometimes in extreme conditions such as heat, cold, and humidity, going for extended periods without food, becoming fatigued, and occasionally sustaining injuries.
The runner’s high likely developed to improve endurance and performance during these long aerobic efforts. It’s essentially evolution’s way of keeping us moving when it matters most: numbing pain, lifting mood, and helping us focus on the task at hand rather than on the discomfort in our bodies.
Understanding that evolutionary purpose also sheds light on the long-term benefits.
This system wasn’t designed to switch on and then disappear—it was designed to encourage the behavior repeatedly, which is why consistent running tends to amplify its effects on mental health and wellbeing over time.
Long-Term Benefits of the Runner’s High
Beyond how good it feels in the moment, regularly experiencing a runner’s high can have lasting effects on your health.
It decreases symptoms of anxiety.
The runner’s high can temporarily suppress the sense of anxiety you may be carrying. Run regularly enough to experience it repeatedly, and those effects can compound—contributing to a meaningful reduction in baseline anxiety over time. It’s not a one-size-fits-all cure, but it’s one of the most accessible natural tools available.3Sharma, A., Madaan, V., & Petty, F. D. (2006). Exercise for mental health. Primary Care Companion to the Journal of Clinical Psychiatry, 8(2), 106. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1470658/
It improves memory and focus.
Running increases neuronal connectivity and communication, which supports the development and consolidation of memory. The neurochemical activity during and after a run appears to prime the brain for learning and retention.4Haynes IV, J. T., Frith, E., Sng, E., & Loprinzi, P. D. (2018). Experimental Effects of Acute Exercise on Episodic Memory Function: Considerations for the Timing of Exercise. Psychological Reports, 003329411878668. https://doi.org/10.1177/0033294118786688
It makes you want to run again.
This might sound obvious, but it matters. One of the biggest obstacles for new runners is staying consistent long enough to see results. The runner’s high gives your brain a concrete, felt reason to come back. Once you’ve experienced it, the motivation to maintain your routine stops feeling like discipline and starts feeling like desire.
Are There Negative Effects?
The runner’s high has no known direct negative consequences for your brain or body. It’s essentially a free benefit—one of the genuine rewards of sustained cardiovascular exercise.
That said, it’s worth acknowledging a nuance: for some runners, the desire to chase that feeling can tip into compulsive territory.
If you find yourself running through injury, feeling anxious when you miss a session, or relying on running to manage your mood to an unhealthy degree, that’s worth paying attention to.
The neurochemistry that makes running feel so good is the same system that can make any rewarding behavior hard to moderate. Most runners never experience this, but it’s worth being aware of.
If you want to lean on the cautious side, the main watch point is overtraining. Pushing volume or intensity beyond what your body can recover from. The runner’s high itself isn’t harmful; the running that creates it can be, if done without adequate rest.
How To Achieve A Runner’s High
Here’s how to maximize your chances of hitting that elevated state.
#1: Run For Over 45 Minutes (At Least)
The runner’s high typically kicks in after around 30–40 minutes of effortful running. This varies by individual and fitness history. Experienced runners often need to push further before the high arrives, because their bodies have adapted to moderate stress.
The key is sustained discomfort with an elevated heart rate, which signals the brain to release feel-good chemicals. This is part of why long runs can feel transcendent in a way that short ones rarely do.
Newer runners with lower fitness levels may find it harder to reach this threshold simply because they can’t sustain the effort long enough, which is a good reason to build mileage gradually rather than forcing it.
Looking to increase your running ability? Grab a free training plan from us.
#2: Push Your Body (But Not Too Hard)
Because endorphins and endocannabinoids are released in response to physical stress, you need to push hard enough to feel some strain. An easy, conversational jog is unlikely to get you there.
That said, going all-out is counterproductive. Aim for a moderate intensity—something around a 4–6 out of 10 on the Rate of Perceived Exertion scale. If you go too hard, you’ll hit exhaustion quickly, and the intense discomfort will drown out the gentler neurochemical response.
Long-distance running at a steady, challenging pace tends to be the sweet spot.
#3: Run Consistently
You need to be physically capable of sustaining effort for an extended period before the runner’s high becomes reliably accessible. For most beginners, that means building a base first—consistent, easy runs that develop the aerobic fitness needed to eventually push into that zone.
The good news is that as your fitness improves, so does your ability to reach and sustain the high.
#4: Mix Up Your Training
Distance runners run the risk of getting into a comfortable groove, where they don’t push themselves hard enough to induce the high.
If this sounds like you, add in some fast intervals, fartleks, or hill runs to up the intensity of your workouts, add some physical stress, and reach that elevated state of mind!
#5: Run With Other People
Research shows that rowers who row together experience higher levels of endorphin surges than the ones who row alone. Since the high applies to all types of strenuous exercise, this principle applies to runners too.5Cohen, E. E. A., Ejsmond-Frey, R., Knight, N., & Dunbar, R. I. M. (2009). Rowers’ high: behavioural synchrony is correlated with elevated pain thresholds. Biology Letters, 6(1), 106–108. https://doi.org/10.1098/rsbl.2009.0670
Sergio Pedemonte, a certified personal trainer, running coach, and owner of Your House Fitness, gives a practical example of how this works in a competitive sport like MMA.
“A great way to achieve the runner’s high is to do cardio that is engaging and does not let you slow down. Cardio, like practicing MMA, is a fun way to achieve the runner’s high. Due to the nature of the sport, slowing down and relaxing will allow your opponent or training partner to gain better positions or land more strikes.”
#6: Listen to Music
A study from McGill University in Canada has shown that listening to music while you run may contribute to the runner’s high.6Salimpoor, V. N., Benovoy, M., Larcher, K., Dagher, A., & Zatorre, R. J. (2011). Anatomically distinct dopamine release during anticipation and experience of peak emotion to music. Nature Neuroscience, 14(2), 257–262. https://doi.org/10.1038/nn.2726
Their PET scans of the participants showed an extra release of dopamine (another chemical that produces happy feelings) at the peak of emotional arousal to the music.
That means the participants would anticipate a part of the song they loved and then enjoy the part while it played – both experiences releasing a surge of dopamine.
#7: Prioritize Rest and Sleep
Your body is best primed to produce endocannabinoids and endorphins when it’s well rested. Aim for eight hours of sleep to maximize your neurochemical output.
Training on tired legs—and a tired mind—makes it harder to both reach and sustain the runner’s high. Rest isn’t just recovery; it’s preparation.
The runner’s high isn’t a myth, and it’s not reserved for the fast or the experienced. It’s a real neurochemical state that your body is built to produce—one that rewards sustained effort with something that feels genuinely, unmistakably good.
The more consistently you run, the more reliably you can access it. And once you know what you’re chasing, every long run becomes something a little more than exercise.
Take a look at our next guide to see how sufficient sleep contributes to better performance:
Thank you Thomas, really interesting article! I am just a beginner training for my first marathon, and I have a stupid question. The runner’s high is a state where the body react to long term discomfort, but long distance experienced runners push their limits and therefor get more and more used to discomfort, does it mean the more you train, the less are your chances to achieve runner’s high?
Hey Jeremy,
Thanks for the question!
Correct that the more you train, the more your body is accustomed to running long distances.
In order to attain the runner’s high, you need stress and discomfort.
This means that experienced runners have to push themselves, just like intermediate runners.
In other words experienced runners experience the high just like all others – they just have to push to a state of discomfort and stress.
Thanks!
Thomas
I always have this sensation that after some kilometers (I’m Brazilian) my body stops to react to the running – just like the tarahumaras preach – and I enjoy it more and more. This sensations is getting more difficult to achieve and it’s make sense based on your article. Thanks for sharing it Thomas.
I ran my first marathon this year and having “Should I stay or should I go” come on when i was struggling late in the race gave me a runner’s high that pushed me longer than before. I played it on repeat 3x to keep the momentum before settling back into a more normal pace. The runner’s high is real!
Great article! Having experienced the runner’s high throughout my 33 yrs of running is sometimes all I need to think about to get myself out the door and go run😉! And there is nothing like the endorphin rush after a good race!!
I often run past the runner’s high and into enormous amounts of pain. Example is 4 hours into my first 50k being very high but 7 hours 7 hours 20 minutes aka end of that run being in immense pain. I am very indifferent to how I feel.