A Study to Test How a New Long-acting Insulin Works in the Body of Patients With Type 2 Diabetes During Exercise and Prolonged Fasting

The study will investigate the safety of once weekly insulin icodec subcutaenously (s.c.) during and after exercise and prolonged fasting in patients with type 2 diabetes (T2D). Participants will first receive insulin decludec (Tresiba®, a long-acting insulin taken once daily) for atleast one week. Afterwards participants will receive insulin icodec that will be administered once weekly at the study site (for a minimum of 7 weeks and maximum of 14 weeks). Insulin icodec is a novel long-acting insulin analogue for once-weekly administration for the treatment of type 2 diabetes. The study will last for about 16-30 weeks. Participant must not participate if participant have suspected hypersensitivity reactions to the study products or cardiovascular diseases within the last 180 days. Female participant cannot take part if she is pregnant, breast-feeding or planning to become pregnant during the study period.