A paper titled, “Global trends in insufficient physical activity among adolescents: a pooled analysis of 298 population-based surveys with 1.6 million participants,” was just published last night by the WHO in The Lancet Child and Adolescent Health. The paper shows that 81% of 11-17 year-olds worldwide are insufficiently active with slight improvements in boys and no changes in girls since 2001. More boys are active than girls and the sex difference is increasing over time. Canada is 12/146. At the end of the manuscript HALO Director Dr. Mark Tremblay wrote a commentary, “Challenges in global surveillance of physical activity,” that was also published, highlighting the challenges in global surveillance of physical activity.