Muscle dysmorphia is a psychological condition where people and mainly men become overly obsessed with muscle mass and body composition and have a obsessive need to work out and diet. They will avoid social and work responsibilities to uphold their workout schedule. They often take drugs and supplements they know are unhealthy in order to accomplish their goal. It is similar to eating disorders such as anorexia nervosa and bulimia that are most common in women. However, some men have eating disorders and some women experience muscle dysmorphia.

Researchers from the University of Windsor in Canada, in a study of novice male and female weight trainers, found that some of their test subjects showed a propensity to develop this problem. While many people undoubtedly have unrealistic body images, extreme focus and devotion are required to reach championship levels. In champions, preoccupation and dedication are considered worthy, but are classified as psychological disorders in less-accomplished people.