A/B Types and Psychophysiological Responses to Exercise Stress.

The article presents a study that measured the difference between psychophysiological responses to exercise stress between Type A and Type B personalities. At light and moderate levels of exercise, the norepinephrine and epinephrine responses of the two groups were similar, but high exercise intensity norepinephrine response of Type A's was significantly greater than that of Type B's. The results suggest that Type A's evidence more positive affect during light and moderate exercise but more negative effect during high intensity exercise than Type B's.