Twenty-seven swimmers, twenty-three aerobic runners, and twenty-two distance runners were tested on measures of affect and four creative thinking tests before and after an exercise session which approximated their normal work-out. Twenty-two sedentary control subjects watched a National Geographic videotape instead of exercising. Pre-test findings indicated that there were no statistically significant differences between groups. There was no evidence of post-exercise enhancement of demonstrated creative thinking following a 30 minute post-exercise pause, nor did exercisers perform better than controls on the creativity tests. The obtained results conflict with popular notions and previous research. However, exercisers did perceive themselves as significantly more exercise. The results suggest that exercisers believe their workouts enhance creative thinking when in fact they do not.