More Time in Glucose Range During Exercise Days than Sedentary Days in Adults Living with Type 1 Diabetes

This study analysis was designed to examine the 24-h effects of exercise on glycemic control as measured by continuous glucose monitoring (CGM). Individuals with type 1 diabetes (ages: 15-68 years; hemoglobin A1c: 7.5% ± 1.5% [mean ± standard deviation (SD)]) were randomly assigned to complete twice-weekly aerobic, high-intensity interval, or resistance-based exercise sessions in addition to their personal exercise sessions for a period of 4 weeks. Exercise was tracked with wearables and glucose concentrations assessed using CGM. An exercise day was defined as a 24-h period after the end of exercise, while a sedentary day was defined as any 24-h period with no recorded exercise ≥10 min long. Sedentary days start at least 24 h after the end of exercise. Mean glucose was lower (150 ± 45 vs. 166 ± 49 mg/dL, = 0.01), % time in range [70-180 mg/dL] higher (62% ± 23% vs. 56% ± 25%, = 0.03), % time >180 mg/dL lower (28% ± 23% vs. 37% ± 26%, = 0.01), and % time