Postprandial exercise appears to be more effective than pre-meal activity in improving glucose control during early to mid-pregnancy among women with type 1 diabetes. Findings from a randomized crossover trial, presented at the European Association for the Study of Diabetes (EASD), show that exercise timing plays a critical role in maternal glycemic management.

Eight pregnant women with type 1 diabetes completed two experimental conditions: exercise before lunch and exercise after lunch. Continuous glucose monitoring tracked glycemic responses over eight days. In early to mid-gestation, post-meal exercise increased time in euglycemia by 10% and reduced glucose variability, while nighttime hypoglycemia decreased by 12%. These benefits were not linked to differences in insulin use, carbohydrate intake, or appetite.

By late gestation, glucose responses were comparable regardless of exercise timing. The data suggest that encouraging post-meal exercise in early pregnancy could be a simple, low-cost strategy to optimize maternal glucose levels and reduce neonatal complications.