Administered the Body Cathexis Scale, Eysenck Personality Inventory, and Tennessee Self-Concept Scale to 142 randomly selected male college students. Relative muscular strength was measured by means of free weights in the bench press and the squat. Because of the influence of body weight on muscular strength, body weight was statistically controlled. Pearson's correlations, trend analysis, and partial correlations were computed, and the results show relative muscular strength to be related significantly to body cathexis, extraversion, neuroticism, and global self-concept. Significant curvilinear relations were revealed between relative strength and neuroticism and between relative strength and self-concept. In general, relatively strong Ss were significantly more satisfied with their body parts and processes, less emotionally labile and anxious, more outgoing, sociable, and impulsive, and more confident and satisfied with themselves than were their muscularly weaker counterparts. (65 ref)