Support for an expanded tripartite influence model with gay men

This study investigated whether an expanded tripartite influence model would represent gay men's experiences. This model was extended by adding partners and gay community involvement as sources of social influence and considering dual body image pathways (muscularity and body fat dissatisfaction) to muscularity enhancement and disordered eating behaviors. Latent variable structural equation modeling analyses upheld this model for 346 gay men. Dual body image pathways to body change behaviors were supported, although three unanticipated interrelationships emerged, suggesting that muscularity and body fat concerns and behaviors may be more integrated for gay men. Internalization of the mesomorphic ideal, appearance comparison, muscularity dissatisfaction, and body fat dissatisfaction were key mediators in the model. Of the sources of social influence, friend and media pressure to be lean, gay community involvement, and partner, friend, media, and family pressures to be muscular made incremental contributions. Unexpectedly, certain sources were directly connected to body change behaviors.

► A model with dual body image pathways to body change behaviors was upheld for gay men.
► Internalization of the mesomorphic ideal and appearance comparison were key mediators.
► Muscularity dissatisfaction and body fat dissatisfaction were also key mediators.
► All five sources of social influence uniquely contributed to the model.
► Friends were a particularly important source of social influence for gay men.