(0.4[0.2–1.0]) ( P = .008) and between PR2 (0.4[0.2–1.0]) and the marathon (0.1[0–0.3]) ( P = .008). There was no severe hypoglycemia or hyperglycemia with ketosis at any time before, during and after the PRs and Marathon. Conclusions.— To avoid exercise-induced hypoglycemia, it is necessary to reduce usual doses