For a high school runner with type 1 diabetes, what is the expected insulin dose adjustment when planning a run 2 hours after lunch?

When planning exercise, such as a run for a high school runner with type 1 diabetes, it is crucial to consider the impact of physical activity on blood glucose levels. Running can lead to increased insulin sensitivity and potentially lower blood glucose levels due to heightened glucose uptake by the muscles during exercise.

In this context, reducing the dose of short-acting insulin before a meal helps to account for the additional glucose utilization that will occur during running. By decreasing the insulin dose by 50%, the runner can lower the risk of hypoglycemia, which may occur if the insulin level in the bloodstream is too high while engaging in physical activity. Therefore, this adjustment for the pre-meal short-acting insulin is a common practice to help maintain stable blood sugar levels during and after exercise.

The other options involving increases or reductions in basal insulin do not align with the typical management strategies for exercise in individuals with type 1 diabetes. Adjustments in basal insulin are generally made in response to longer-term changes in blood glucose levels rather than immediate pre-exercise planning, especially when the exercise is scheduled shortly after a meal.