Abstract: Objective: To evaluate the correlation between MiniMed continuous glucose monitoring system blood glucose (CGMSBG) and self monitoring blood glucose (SMBG) both in a sedentary group and in an exercise group, and study the accuracy of CGMS after exercise. Methods: Thirteen type 2 diabetic patients admitted to hospital were submitted to CGMS. The correlation and coincidence between CGMSBG values and SMBG values before and after exercise were assessed with the Person correlation analysis. Results: The correlation coefficient r of 223 CGMSBG values and paired sedentary SMBG values was 0.939 (P＜0.01). When the CGMSBG value was below 4.4mmol/L, the correlation coefficient r was 0.524(P＜0.05). When it was between 4.4 and 10mmol/L, the coefficient r was 0.811(P＜0.01) . The correlation coefficient r of the CGMSBG and SMBG values after exercise was 0.960(P＜0.01) and was clinically favorable with the median of -0.1mmol/L. Conclusion: The correlation and coincidence between CGMSBG values and SMBG values are favorable. The CGMSBG value and the SMBG value mostly fit when they are at the middle level, but the CGMSBG value is a bit higher than the SMBG value when at a low level and is a little lower than the SMBG value when at a high level. The CGMSBG value is higher than the SMBG value after acute exercise, but they still have good concordance.

Key words: Diabetes, Exercise test, Continuous glucose monitoring system