Many people who exercise regularly have experienced a so-called "runner's high," either a feeling of euphoria after exercise, or a feeling of happiness and well-being. Scientists have studied this and found that exercise does indeed improve mood and combat stress, for instance, but researchers at Finland's University of Turku wanted to know: Are endorphins being produced in and thus affecting the brain? To try to answer this question, the team labeled a drug that can bind to endorphin receptors in the brain and compete with endogenous endorphins. So if the study subjects were producing endorphins in the brain, the drug binding should be reduced. Listen to Neuropsychopharmacology's latest podcast to learn more!

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