Physical Exercise in Normobaric Hypoxia and Normoxia in Type 1 Diabetic Patients

Hypoxia leads to HIF-1 production (hypoxia inducible factor 1) which regulates expression of many genes (eg. gene responsible for erythropoetin production). It also stimulates angiogenesis, muscle hypertrophy and glycolytic energy production by transactivating genes involved in extracellular glucose import. Before starting the training program all participants will be assessed by cardiologist. Then the incremental exercise test will be performed to determine aerobic capacity (VO2max). Recruited patients ( type 1 male diabetic patients) will be divided into 2 arms: exercise in normoxia or in normobaric hypoxia. Hypoxic chamber is set to contain equivalent to an altitude of 2500 meters above see level (indoor air composition: 15,4% of O2 and 84,7% of N). Training program will be the same for all participants: 60 minutes sessions twice a week for 6 weeks of mixed exercise: aerobic and anaerobic. Glycemia will be monitored by Flash Glucose Monitoring (Free Style Libre) and the same glucometer model by all patients. At baseline and after 6 weeks: echocardiography, ECG and incremental exercise test, ECG and blood pressure monitoring, lipid profile and diabetes control parameters will be performed in all patients.