Exercise makes insulin work better because it consumes carbohydrates consumption. In other words, less insulin is needed to balance the carbohydrates consumed. Therefore, children who exercise regularly may find that taking their typical doses of insulin before eating a typical amount of food may still give lower blood sugar levels. (Please note: every child is unique and many factors affect blood sugar levels, so exercise will not always result in lower blood sugar levels.)
As mentioned above, children may also find themselves with low blood sugar in physical education classes. Estimating the amount of insulin becomes more challenging as activities and intensity levels can vary in every lesson- from high activity intensity like playing matches, running and other strenuous activities to low activity intensity like learning a new game. Children should be more aware of how they feel and prepare more snacks and spare insulin injections, while teachers should be more alert to the behavior of the student.
A child may also be more active during recess and field trips. Older children with diabetes who participate in a sport need to plan for this additional activity. They may reduce insulin intake or eat extra food before the activity begins.