 - Visit 3: 24 hours DreaMed MD-AID or SAP with afternoon exercise in the time between 16:30 and 19:30: an i.v. catheter will be inserted in the antecubital or cephalic vein for plasma BG and emergency. Cycle ergometer will be adjusted for each subject work rate, seat height,.., they will be instructed to pedal at steady rate of 50-60 rotations per minute RPM.The subjects will cycle for 40 minutes at 55 Vo2max load starting work rate set to 30 watts W with linear loading to reach 55 VO2max on 5:00 minute exercise time - the aim of this session is to induce delayed hypoglycemia. 