Natural High

A "natural high" is a mental state of happiness and well-being that can occur as the result of exercise and the pursuit of pleasurable activities. For instance, many runners and other exercise aficionados report feelings of well-being and even near euphoria as a side-effect of their love of physical exertion. This is believed to be a result of the heightened blood-flow and greater intake of oxygen that is part and parcel of exercise programs.