Michael Riddell and Bruce Perkins are Canadian leaders in diabetes and exercise medical research and advice.
In this article, they discuss the risks, challenges and strategies to enable effective participation in vigorous exercise activities, such as team sports. They also discuss the impact of pressure associated with competition.
http://www.insulinfactor.com/graphics/pdf/t1_diabetes_and_vigorous_exercisel.pdf
Article published in 2006 in the Canadian Journal of Diabetes.