Consistent with previous research on school and college samples (Daniel and Bridges, 2010; Stratton et al., 2015; Edwards et al., 2016), internalization of media body ideals was the strongest predictor of drive for muscularity and its related attitudes and behavior in weight-training men. Mass media play a key role in distributing an unrealistic muscular and lean male body image, which becomes the body ideal for many boys and men trying to achieve this goal by any means (Smolak et al., 2005; Cafri et al., 2006; Parent and Moradi, 2011; Readdy et al., 2011). To our knowledge, there are no studies explicitly investigating the impact on internalization of media body ideals in weight-training samples so far, but it can be assumed, that this sample shows higher degrees of internalization, since they might also be closer to this ideal than the usual samples of school boys and college or community men. Although this is only of descriptive value, we have found one study (Parent and Moradi, 2011) also using the internalization subscale of the SATAQ, showing a quite lower mean (M = 1.75, SD = 0.71) in a sample of college men than our sample (M = 2.88, SD = 0.93). Since increased levels of internalization were associated with increased drive for muscularity, it appears useful to develop prevention approaches for the weight-training community helping to reveal the potential harm that comes with the belief in, and massive consumption of, unrealistic body ideals.