{
  "id": 234477,
  "title": "The neuroscience behind a 'runner's high'",
  "url": "https://urgent.news/2026/08/06/the-neuroscience-behind-a-runners-high",
  "topic": "health",
  "section": "Health & Medicine",
  "published": "2026-08-06T18:20:08.000Z",
  "source": {
    "name": "Medical Xpress",
    "slug": "medical-xpress",
    "url": "https://medicalxpress.com/news/2026-08-neuroscience-runner-high.html"
  },
  "original_language": "en",
  "account": "The elusive runner's high, experienced by some after intense exercise, is no longer thought to be solely caused by endorphins, the body's natural opioids. Recent neuroscientific research suggests that this experience arises from the interaction of several brain systems working together. Endorphins, which reduce pain, are released during physical stress and do increase with aerobic exercise like running. However, they struggle to cross the blood-brain barrier and are not entirely responsible for the euphoria and emotional well-being associated with a runner's high.\n\nThe key to understanding the runner's high lies in the activation of the endocannabinoid system, which includes the brain's natural \"feel-good\" chemical anandamide. Unlike endorphins, anandamide can easily cross the blood-brain barrier, activating cannabinoid receptors in regions controlling emotion, motivation, reward, and pain perception. This results in reduced anxiety, improved mood, less pain, and feelings of calm—similar to the effects of a runner's high. Endorphins and endocannabinoids likely work together, with endocannabinoids playing a more significant role in producing the emotional aspects.\n\nOther neurotransmitters such as dopamine, serotonin, and noradrenaline also contribute to the runner's high. Dopamine reinforces beneficial behaviors, serotonin promotes emotional stability and well-being, and noradrenaline enhances alertness and focus. Exercise stimulates the production of brain-derived neurotrophic factor (BDNF), which supports the growth of brain connections and plays a vital role in learning and memory. While BDNF likely doesn't produce immediate euphoria, it may help explain why regular running improves various aspects of well-being.\n\nA runner's high is more than just pleasure chemicals; it changes how different brain networks communicate. During prolonged, rhythmic exercise, activity within the default mode network, associated with self-reflection and worry, decreases, while brain regions involved in attention, movement, and sensory processing become more coordinated. This shift may explain the feelings of mental clarity and immersion in the present moment that many people experience after running. The mental benefits of a runner's high often persist even after the run itself, improving stress regulation, inflammation, neuroplasticity, sleep quality, and emotional processing. These benefits are unique to exercise and are not achieved through most medical interventions. While the runner's high is a significant contributor to these positive effects, even people who don't experience it still show meaningful improvements in mood, cognition, and resilience with regular physical activity. However, to achieve a runner's high, there is a \"sweet spot\" of approximately 30–60 minutes of continuous aerobic exercise at moderate to vigorous intensity, roughly 70%-85% of maximum heart rate. The physiological stress must be sufficient to trigger neurochemical responses without overwhelming the body. Individual variation plays a significant role, with factors like genetics, sex, fitness level, sleep quality, psychological state, and expectations influencing whether someone experiences a runner's high on any given day.",
  "summary": "While most runners are chasing a new goal or a personal best, some are chasing something slightly more elusive: a runner's high.",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}