Assessing the Rising Emphasis on Muscularity for Women: Psychometric Properties of the Brazilian Version of the Female Muscularity Scale

The female appearance ideal has undergone considerable changes in recent years, resulting in increases in drive for muscularity among Brazilian women. The Female Muscularity Scale (FMS) was developed to assess muscularity concerns among U.S. women and was shown to be a promising measure of muscularity-related attitudes and behaviors. The present studies aimed to translate and culturally adapt the FMS to Brazilian Portuguese and to explore its factorial structure among Brazilian women (Study 1: n = 202, M_age = 24.40, SD = 5.03) and to confirm the factor structure as well as evaluate convergent and divergent validity and reliability of the FMS for young adult Brazilian women (Study 2: n = 382, M_age = 22.71, SD = 4.32). Exploratory factor analysis revealed a two-factor structure (Attitudes and Behaviors subscales), each comprising five items. Confirmatory factor analysis upheld the original two-factor structure with good fit indices. The full scale and its subscales presented convergent validity through associations with measures of body dissatisfaction, drive for muscularity, body-ideal internalization, body checking and avoidance behaviors, disordered eating, and exercise engagement. Evidence of divergent validity was obtained in relation to self-esteem and depressive symptoms. The Brazilian version of FMS also presented adequate values for internal consistency and 2-week test-retest reliability. These findings support the Brazilian version of the FMS as a useful tool for investigating muscularity-related aspects of body image and body change behaviors that are increasingly a source of concern for women.