Glutamine and Insulin Sensitivity in Type I Diabetes

Participants will keep a diary of food intake and activity as well as wear an accelerometer (to measure overall movement) for 2-3 days prior to the admission. Subject will come to the Clinical Research Center for approximately 24 hours. They will receive a drink containing Glutamine (0.25 g/kg/dose). Afterwards they will have an afternoon exercise session consisting of 15-min bouts of exercise, interspersed with 5-min rest periods in between for a total of 75min. Blood glucose will be checked during rest intervals. They will be served a controlled dinner. Before bedtime another dose of the same drink will be given. Overnight blood glucose will be monitored closely. In the morning, another dose of the same drink will be given. Subjects will have two isotope infusions (non-radioactive) running concomitantly and a hyperinsulinemic-euglycemic clamp will be performed. Afterwards lunch will be served and subject discharged home.

Participants will keep a diary of food intake and activity as well as wear an accelerometer (to measure overall movement) for 2-3 days prior to the admission. Subject will come to the Clinical Research Center for approximately 24 hours. They will receive a PLACEBO drink. Afterwards they will have an afternoon exercise session consisting of 15-min bouts of exercise, interspersed with 5-min rest periods in between for a total of 75min. Blood glucose will be checked during rest intervals. They will be served a controlled dinner. Before bedtime another dose of the same drink will be given. Overnight blood glucose will be monitored closely. In the morning, another dose of the same drink will be given. Subjects will have two isotope infusions (non-radioactive) running concomitantly and a hyperinsulinemic-euglycemic clamp will be performed. Afterwards lunch will be served and subject discharged home.