Exercise and Glucose Control in Healthy Individuals

Pre-Meal Exercise Effects

In healthy individuals without diabetes, pre-meal exercise of longer duration (30-40 minutes) causes a decline in blood glucose levels, though this typically does not reach hypoglycemic levels 1
The enhanced insulin sensitivity from the pre-meal workout persists for hours after exercise, facilitating more efficient glucose disposal when carbohydrates are consumed, as recommended by the American Heart Association 2

Healthy individuals controlled by lifestyle alone do not require carbohydrate supplementation for exercise lasting less than an hour, according to the American Diabetes Association 1
Activities of longer duration and lower intensity generally cause a decline in blood glucose levels but not to hypoglycemic levels in non-diabetic individuals, as stated by the American College of Sports Medicine 1
The glucose-lowering effect observed is physiologic and beneficial, not pathologic hypoglycemia 3