Using a hierarchical forced entry method, three multiple linear regression analyses were conducted. All variables were investigated regarding their relation with (1) drive for muscularity, in addition to each of the (2) muscularity-related attitudes, and (3) muscularity-related behavior subscales. Since there is only marginal evidence for the association with biological factors, such as age or FFMI (Cafri et al., 2005), these variables were added separately. Thus, all three regression analysis were conducted with two steps each, (1) one for the biological factors and (2) one for the psychological and sociocultural factors.