How can physical and emotional stress change hormone secretion?

The human endocrine system plays a critical role in managing stress by initiating adaptive responses to both physical and emotional challenges. Whether the stressor is a physical threat or a psychological one, the body typically reacts in a similar fashion through a process known as the fight-or-flight response.12

When a stressor is detected, the hypothalamus activates the sympathetic nervous system and triggers a hormonal cascade. Key endocrine changes include:2

• Adrenal Cortex: Increased secretion of cortisol, which helps mobilize energy and manage inflammation.12
• Adrenal Medulla: Increased secretion of epinephrine and norepinephrine, which elevate heart rate and blood pressure to prepare the body for immediate action.12
• Pancreas: Increased secretion of glucagon, which helps raise blood glucose levels for energy.13

While these responses are vital for survival during acute threats, chronic stress can lead to prolonged elevation of these hormones, potentially resulting in health issues such as high blood pressure, weakened immunity, and metabolic disruption. Conversely, in cases of prolonged physical stress like starvation, the body may reduce the production of thyroid hormones and sex steroids to conserve energy.421