Hyperglycaemia during exercise in insulin pump users has been reported previously, although this was following a short period of intense exercise (80% \documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$ \overset{\cdot }{V}{\mathrm{O}}_{2 \max } $$\end{document}V⋅O2max) and without significant changes to plasma free insulin levels [8]. This evidence concerns the gene INS and Hyperglycemia.