Individuals’ view of self, their self-schema, is a critical determinant of behavior (see Markus & Nurius, 1986). For example, individuals who value exercise and self-describe as exercisers (exercise schematics) exercise more frequently than those who do not value exercise and do not self-describe as exercisers (non-exercise schematics) (Kendzeirski, 1998). With the increasing level of inactivity in the United States (CDC, 2000) and the health consequences associated with a sedentary lifestyle (USDHHS, 1996), knowledge of the mechanisms that influence individuals’ self-schemata may be helpful in promoting physical activity. Feedback is one factor that influences individuals’ physical self-perceptions (Whitehead & Corbin, 1991), and may be particularly influential when inconsistent with their exercise self-schemata. Research in the academic domain using response latency to assess cognitive processes has shown that feedback inconsistent with individuals’ schemata causes them to question or doubt what is possible for them (Cross & Markus, 1994). The purpose of the present study is to compare the effects of performance feedback on the thought processes of exercise and non-exercise schematics. From 234 exercise and non-exercise schematics, 48 exercise (n=26) and non-exercise schematics (n=22) agreed to participate in fitness testing. Regardless of their actual fitness, individuals randomly assigned to the negative feedback group were told that their overall fitness was below average, whereas those randomly assigned to the control group received no performance feedback. Immediately following the treatment, participants’ response latencies relative to physical activity descriptors of what is possible for them (e.g., coach potato; energetic) were measured. Two 2 x 2 (Schema x Treatment) ANOVAs revealed unexpected results. First, no significant results were found regarding response latency to positive physical activity descriptors. Second, a significant Schema by Treatment interaction (F_(1,43) =4.22, p < .05) revealed that exercise schematics who received schema inconsistent information (i.e., negative feedback) regarding their physical fitness responded more quickly (M=645 ms, SD=119 ms) to negative physical activity descriptors than those who did not receive any feedback (M=821 ms, SD=274 ms), whereas the non-exercise schematics who received schema consistent information (i.e., negative feedback) responded more slowly (M =744 ms, SD=167 ms) to the negative descriptors than those who didn’t receive any feedback (M =704 ms, SD =132 ms). These results indicate negative fitness-related feedback does not necessarily cause one to doubt that they will be physically active in the future.