Table 1 Inclusion and Exclusion Criteria for Study Participants.

PwT1D over the age of 18

Presence of sleep apnoea or co-morbidities (e.g., cancer, kidney disease, Crohn’s disease) that impose additional nutritional re- strictions

Diagnosed with T1D for over 2 years

Pregnancy, due to its impact on glycaemic control

Regular use of prescribed glucose sensors

Shift worker, as it significantly alters sleep patterns

Use of medications affecting sleep and/or physical performance (e.g., sleep tablets, melatonin, performance-enhancing drugs)

Reliance on Self-Monitoring of Blood Glucose (SMBG) via a glucometer instead of a continuous glucose sensor