From The Guardian: “The pressure on young men, and boys, to become more muscular has grown,” says Jason Nagata, assistant professor of paediatrics at the University of California, San Francisco, and an expert in body image and eating disorders. In a 2018 study of more than 15,000 US high school students published in the Journal of Adolescent Health, nearly one third of teenage boys aged 13-18 reported trying to gain weight or bulk up. This ambition affects even small children. “There have been studies that show boys internalise a desire to be muscular as young as six,” Nagata says.