In this video, Helen, an experienced athlete, describes how she runs to make herself feel alive.
In this video, Helen, an experienced athlete, describes how she runs to make herself feel alive. Her brain, she explains, transforms her vigorous exercise into a wonderful experience. This feeling of euphoria is known as the "runner's high." After providing an evolutionary perspective, the narrator goes on to explain the physiological process involved in this phenomenon. Research indicates that the brain contains types of neurotransmitter molecules that are similar to morphine. These natural opiates are released in response to pain and vigorous exercise. During exercise, pain receptors in the body, especially from muscles and joints, send electrical signals to the brain. In response, the pituitary pumps out natural opiates that numb the pain receptors in the body and also reduce pain messages sent to the brain. Helen explains how, in spite of her legs working very hard, they feel fresh, and she feels like she could "conquer the world."