What is the term "runner's high" associated with in the context of exercise addiction?

The term "runner's high" refers to a state of euphoria that can occur during prolonged or intense exercise, which is particularly noted among runners. This phenomenon is attributed to biological factors, specifically the release of endorphins and other neurotransmitters in the brain that can induce feelings of happiness or elation. When individuals engage in sustained physical activity, they often experience this surge of endorphins, which not only contributes to an enhanced mood but can also create a sense of well-being and even an analgesic effect, helping to mask pain.

This biological response is a key component in the context of exercise addiction, as individuals may seek out this feeling repeatedly, potentially leading to compulsive exercise behavior. While the other options focus on social aspects or pain relief, they do not address the biological basis of the euphoric sensation that defines "runner's high" in terms of neurochemistry and its implications for addiction to exercise. Thus, understanding the biological factors involved is crucial for recognizing the interplay between exercise and addiction dynamics.