Internalization of muscularity and thinness ideals: Associations with body dissatisfaction, eating disorder symptoms, and muscle dysmorphic symptoms in at risk sexual minority men

OBJECTIVE: In the tripartite influence model, appearance‐ideal internalization is identified as a prominent risk factor for the development of body dissatisfaction and subsequent eating disorder (ED) behaviors. For men, prior research has emphasized the importance of both thin‐ideal internalization and muscular‐ideal internalization in explaining later ED behaviors and muscle dysmorphia (MD) symptoms. Previous research in heterosexual men has shown that the associations between muscular‐ideal internalization and ED or MD symptoms may depend on whether the individual has also internalized the thin ideal. However, this interaction has not been examined in research with sexual minority men (SMM). METHOD: The current study collected self‐report data from 452 at risk SMM (i.e., endorsed body dissatisfaction), with ages ranging from 18 to 35 years. Linear regression models were conducted to test the interaction effects between thinness and muscularity internalization on ED symptoms, MD behaviors, and general body dissatisfaction. Simple slopes and the Johnson–Neyman technique were used to investigate significant interaction terms. RESULTS: Thin‐ and muscular‐ideal internalization were positively associated with muscular appearance intolerance and dietary restriction with no significant interaction. Muscular drive for size was highest when both muscularity internalization and thinness internalization were high. Muscular‐ideal internalization was positively associated with both cognitive restraint and general body dissatisfaction, but only at lower levels of thinness internalization. DISCUSSION: Given the interacting association between thinness and muscularity internalization and aspects of body dissatisfaction, attitudes, and behavior, prevention and intervention programs for EDs and MDs in SMM should seek to dismantle both thinness and muscularity internalization. PUBLIC SIGNIFICANCE STATEMENT: Internalizing—or adopting as one's own—the ideal of a body with low body fat and high muscularity has been shown to lead to muscle dysmorphia and eating disorder symptoms in men. The current study examines whether the combination of thin‐ideal and muscular‐ideal internalization is associated with worse symptoms than either facet alone in sexual minority men. Treatment efforts in sexual minority men should address both types of internalization.