Probability of “in exercise” hypoglycemia (defined as one or more CGM values <70 mg/dL during exercise) based on CGM-based glucose level at the start of exercise (A), glucose rate of change at start of exercise (B), IOB at the start of exercise (C), and % time <70 mg/dL in 24 h before exercise (D). Black dots indicate the mean probability of hypoglycemia during exercise at each level of the variable. The dashed blue line represents the mean incidence of hypoglycemia during exercise. CGM, continuous glucose monitoring; IOB, insulin on board.