Measures of multidimensional self-concepts (Self Description Questionnaire III), masculinity (M), and femininity (F) (Australian Sex Role Scale) were completed by high school women athletes and nonathletes, and by young adult women athletes and nonathletes. Women athletes in both age groups had substantially higher scores in masculinity and self-concept of physical ability, but did not differ substantially from nonathletes in femininity and in other areas of self-concept. Women athletes in both groups also judged their self-concept of physical ability to be more important to them than did nonathletes, but the two groups did not differ in the perceived importance of other areas of self-concept. These findings support the androgyny contention that MF should not be considered a bipolar construct and suggest that women can be more masculine without being less feminine. The specificity of the relation between athletic involvement and the multiple dimensions of self-concept also provide further support for the construct validity of the self-concept dimensions. (Author/BS)