Fig. 1

Adrenaline, glucose, noradrenaline, cortisol, glucagon, and insulin-like growth factor 1 responses for the three different exercise intensities (solid line = low workload, dashed line = moderate workload, dashed-dotted line = heavy workload) for continuous exercise and high-intensity interval exercise in a single patient with type 1 diabetes exhibiting an atypical blood glucose time course during exercise. Accompanying blood glucose levels for continuous exercise and high-intensity interval exercise are given for adrenaline responses in the first segment (solid line = low workload, dashed line = moderate workload, dashed-dotted line = heavy workload). CE Continuous exercise, HIIE High-intensity interval exercise