Which of the following will not lead to hyperglycemia?

Injecting too much insulin would not lead to hyperglycemia; in fact, it can cause hypoglycemia, which is a state of low blood sugar levels. When insulin is injected, it facilitates the uptake of glucose from the bloodstream into cells, thereby reducing blood glucose levels. If excessive insulin is administered, it can lead to a significant drop in blood sugar, potentially resulting in symptoms of hypoglycemia such as dizziness, confusion, sweating, and in severe cases, loss of consciousness.

In contrast, the other scenarios presented, such as vigorous exercise, eating high amounts of carbohydrates, and experiencing stress, can all contribute to elevated blood glucose levels. During intense exercise, the body may release counter-regulatory hormones such as glucagon and epinephrine that increase glucose production by the liver. Consuming a large quantity of carbohydrates directly increases blood glucose levels as they are broken down into glucose for energy. Stress triggers a hormonal response that can also lead to increased glucose production, further raising blood sugar levels.