The current study also has a number of limitations. As described regarding the influence of age, a longitudinal approach could lead to more valid findings. A cross-sectional design, as used in this study, limits inference with regard to the temporal order in which the factors may operate. Also, online studies rely on self-reported measures, which are especially prone to biases in regard to body measures. Although, bodybuilders and weight-trainers can be assumed to have more precise knowledge about their bodies than the average person, on-site measuring would be preferable and should be used in future studies.