Incarcerated youth are one of the most disadvantaged population groups.1,2 Compared with their community peers, they have a higher prevalence of risk factors for chronic disease, including alcohol misuse, smoking, mental illness, Aboriginality and lower socioeconomic status.1 In 2010, almost a quarter of Australians aged 14???17 years were overweight or obese, and 6% were obese.3,4