Christy

“Runner’s high” is a well-known endorphin experience. But you cannot get a daily high from a daily run. Endorphin is only released if you push past your capacity to the point of distress. This is not necessarily a good way to promote survival. Endorphin did not evolve to motivate self-inflicted pain. It evolved to escape pain. Perhaps you’ve seen a zebra wriggle out of the jaws of a lion on a wildlife documentary.”
― Loretta Graziano Breuning, Habits of a Happy Brain: Retrain Your Brain to Boost Your Serotonin, Dopamine, Oxytocin, & Endorphin Levels