Observational Study of 20 Runners Shows Type 1 Diabetes Patients Finish Marathons in 228 Minutes Median
Small observational study of 20 Poznań Marathon runners found comparable completion times and manageable glucose control in T1D participants using CGM and insulin titration. Sensor accuracy fell during the race, underscoring need for capillary checks. Larger trials must confirm generalizability and safety thresholds.
Next steps require multicenter prospective cohorts of at least 100 T1D endurance athletes tracked over multiple events with standardized hybrid closed-loop protocols to establish hypoglycemia incidence thresholds below 5% and refine CGM calibration under sustained metabolic stress.
VITALIS: A 2027 multicenter registry of 150 T1D marathon finishers will report time-below-range under 3% when hybrid closed-loop systems are used with 150 mg/dL targets.
Sources (2)
- [1]EASD 2025 Abstract: Kulecki et al. Glucose patterns during marathon in T1D(https://www.easd.org/programme)
- [2]Diabetes Care 2024: Closed-loop performance in prolonged exercise(https://diabetesjournals.org/care)