Shortlist, Bigorexia by Anton Dotsenko

"Bigorexia (also known as muscle dysmorphia) is a new phenomenon in the sports and fashion industries. This anxiety disorder causes individuals to believe that their bodies are small and lacking in muscle, despite the fact that many sufferers could be described as big and muscular.

Bigorexia can affect both men and women, but often goes undiagnosed. People choose different approaches to build up muscles, from compulsively working out in the gym to injecting themselves with mystery substances. Some people are genetically gifted, which can lead to a very successful career in sport, others opt for methods that are dangerous, and occasionally even deadly."