consecutive periods which then leads to calcium and bone loss, putting the athlete at great risk of fracturing bones and damaging tissues. Each of these conditions is a medical concern as they create serious health risks that may be life-threatening to the individual. While any female athlete can develop the triad, adolescent girls are considered most at risk because of the active biological changes and growth spurts that they experience, rapidly changing life circumstances that are observed within the teenage years, and peer and social pressures. Social media Researchers have said the most pervasive and influential factor controlling body image perception is the mass media. One study examined the impact of celebrity and peer Instagram images on women's body image as, “comparisons will be most readily made with individuals who are perceived as being similar” to the target as there is more of a relationship between the two parties. The participants in this study, 138 female undergraduate students ages 18–30, were shown 15 images each of attractive celebrities, attractive unknown peers, and travel destinations. The participant's reactions were observed and visual scales were used to measure mood and dissatisfaction before and after viewing the images. The findings of this experiment determined that negative mood and body dissatisfaction rankings were greater after being exposed to the celebrity and peer images, with no difference between celebrity versus peer images. The media is especially dangerous for females at risk for developing body image issues, and disordered eating, because the sheer number of possible comparisons become larger. See also Night eating syndrome Overeaters Anonymous References Eating disorders Symptoms and signs of mental disorders