Safety and Efficacy of Initializing the Control-IQ Artificial Pancreas System Using Total Daily Insulin

Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.

Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.