The goal of the present experiment was to investigate the relationship between the self-perception of cardiac activity and different psychophysiological factors. A mental tracking task (Schandry, 1981) and a discrimination procedure (Katkin, Blascovich, & Goldband, 1981) were used to evaluate cardiac awareness. Psychometric scores on anxiety, personality traits, psychosomatic symptoms and self-consciousness were obtained using questionnaires (STAI, FPI, FBI, SCS). Cardiovascular activity was recorded using EKG and impedance cardiography (IKG). In addition, measures of blood pressure and percentage of body fat were taken. Subjects' performances on both tasks were quite different. Most of the subjects showed a poor performance in the discrimination task. No correlation was found between the tracking and the discrimination task. Furthermore, the results of the multiple regression analysis showed that body fat percentage was the best predictor of the performance on Schandry's test, explaining 24% of its total variance. Group differences between subjects with high and low cardiac awareness were found in systolic blood pressure, percentage of body fat and heart rate. The psychological variables, such anxiety, extroversion or neuroticism, were no relevant for cardiac awareness.