Accuracy of Two Continuous Glucose Monitoring Devices During Aerobic and High-Intensity Interval Training in Individuals with Type 1 Diabetes
Authors' conclusion
The findings suggest that the accuracy of DG6 and FSL2 deteriorates during and immediately after exercise but remains acceptable for both devices during HIIT. However, accuracy is compromised with DG6 during aerobic exercise.
Study context
- Population
- Males with T1D (mean age 29.3 ± 6.3 years; mean diabetes duration 14.9 ± 6.1 years) during aerobic training and high-intensity interval training (HIIT)
- Participants
- 26 males
- Comparison
- Dexcom G6 (DG6) vs FreeStyle Libre-2 (FSL2) during aerobic training and HIIT, vs YSI 2500 plasma glucose reference
- Outcome
- Accuracy of DG6 and FSL2 vs YSI 2500 plasma glucose (measured every 10 min)
- Follow-up
- 20 min before exercise to 20 min after exercise
Methodological detailsSeven measurements taken for each subject and exercise
- Seven measurements taken for each subject and exercise
Performance
As reported in the abstract
CGM accuracy vs YSI during exercise
Continuous glucose monitoring (CGM) devices performed better during HIIT than aerobic training; DG6 mean absolute relative difference, HIIT
14.03%
DG6 mean absolute relative difference, aerobic training
31.98%
Further findings
40/40 criteria
- Both sensors performed similarly; marks over 93% for all ranges and both exercises
- Marks above 99% for HIIT and in the >180 mg/dL range, in accordance with FDA guidelines
Original publication
Accuracy of Two Continuous Glucose Monitoring Devices During Aerobic and High-Intensity Interval Training in Individuals with Type 1 Diabetes. Diabetes Technol Ther. Published 30 May 2024. doi:10.
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