Ann Clin Case Rep | Volume 3, Issue 1 | Case Report | Open Access

The Use of Continuous Glucose Monitoring for Sport in Type 1 Diabetes

Esther O'Sullivan1,2,*, Abdulrahman A1, Manhas J1, Linnane H2, Gurney M2 and Fitzgerald C1

1Department of Medicine, National University of Ireland, Ireland
2Department of Diabetes, Endocrinology and Metabolism, Galway University Hospital, Ireland

*Correspondance to: O&Sullivan E 

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The benefits of exercise for patients with Type 1 Diabetes (T1D) are difficult to balance with associated glycaemic excursions. The aim of this study was to show that Continuous Glucose Monitoring (CGM) could reduce glycaemic excursions in patients with T1D already using insulin pumps, exercising at moderate to high intensity. Questionnaires were used to identify T1D patients using insulin pumps and naïve to CGM use, who reported regular exercise. 6 were enrolled and trained on Enlite sensor use with Medtronic Minimed Paradigm® Veo™ system, and given activity trackers and written advice on adjustment of insulin or carbohydrate intake for exercise. Resting heart rate (HR) and age were used to determine HR surrogates of moderate and high intensity exercise. They were to exercise as usual for 3 weeks (run-in week, week 1 and week 2), using the activity trackers and heart rate monitors. PAID, HFSII, DTQ and Gold scores were completed prior to run-in and at the end. The downloaded sensor glucose data was used to compare the change in time in range (glucose 3.9-10.0 mmol/l) from week 1 to week 2 For the duration of exercise this time in range glucose Range increased from 72 ± 20 to 88 ± 16%, p=0.05. The time in hypoglycaemia range (glucose <3.9 mmol/l) went from 3.9 ± 7.9 to 2.4 ± 4.8%, p=0.39. The time in hyperglycaemia range (>10 mmol/l) reduced from 24 ± 19 to 10 ± 17%, p=0.04. These results demonstrate the benefit of CGM use for patients with T1DM doing moderate to high intensity exercise.


Abdulrahman A, Manhas J, Linnane H, Gurney M, Fitzgerald C, O&Sullivan E. The Use of Continuous Glucose Monitoring for Sport in Type 1 Diabetes. Ann Clin Case Rep. 2018; 3: 1523.

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