Even though some researchers have presented the advantages of the FFMI over the BMI (Cafri et al., 2005), to our knowledge, only two studies (using college samples) have systematically analyzed the FFMI in relation to drive for muscularity (McCreary et al., 2006; Chittester and Hausenblas, 2009). In contrast to Chittester and Hausenblas (2009) who did not detect any relations, we found an association of FFMI with muscularity-related behavior, but not with attitudes. This is partly in line with findings of McCreary et al. (2006). It appears that higher muscle mass is related to more muscularity-related behaviors. Thus, current results suggest that muscle growth relates to the behavioral, but not to attitudinal features of drive for muscularity.