GCG and Hypoglycemia: The mean glucagon response to stepped hypoglycemia (rest 55 = 84 ± 5 pg/mL, exercise 55 = 77 ± 4 pg/mL, rest 45 = 94 ± 7 pg/mL, exercise 45 = 91 ± 6 pg/mL) did not differ after comparing prior exercise and rest within each glycemic level (P = 0.72) in Arm 1 with dextrose infusion (Fig. 5A).