Reasons for increased blood glucose due to sympathetic nervous system activation

Increased blood glucose due to sympathetic nervous system activation may be caused by factors such as emotional stress, intense physical exercise, or acute cerebrovascular disease.

1. Emotional Stress

If a person experiences prolonged mental pressure or emotional stress, the sympathetic nervous system is easily activated, leading to increased secretion of adrenal hormones. Adrenal hormones counteract insulin. During emotional stress, large amounts of thyroid hormone, growth hormone, and other hormones are typically secreted, resulting in stress-induced hyperglycemia.

2. Intense Physical Exercise

Frequent intense exercise can keep the sympathetic nervous system in an excited state, generally causing the body to produce large amounts of norepinephrine and epinephrine. These two hormones tend to reduce insulin secretion, thereby promoting elevated blood glucose levels. Additionally, during exercise, glycogen stored in the liver is usually converted into glucose to meet the body's metabolic demands. The release of glucose into the bloodstream can easily lead to increased blood glucose levels.

3. Acute Cerebrovascular Disease

Acute cerebrovascular disease often leads to sympathetic nervous system activation and may also cause heightened basal metabolism, resulting in increased blood glucose levels.