Runner's High
An intense bout of exercise can improve mood and create a sense of euphoria — an effect popularly known as the “runner’s high.” Once thought to result from a flood of endorphins, scientists now think signaling in the brain’s endocannabinoid system drives the feel-good effects of exercise.
This video won second place in the 2018 Brain Awareness Video Contest. http://www.brainfacts.org/bavc