Short intense psychological stress induced by skydiving does not impair intestinal barrier function

Area of Science:

• Gastroenterology
• Psychoneuroimmunology
• Human Physiology

Background:

• Psychological stress is linked to increased intestinal permeability and gastrointestinal disorders.
• Investigating acute stress models is crucial for understanding gut barrier function.
• Skydiving offers a unique model for acute psychological stress induction.

Purpose of the Study:

• To assess the impact of acute psychological stress from skydiving on intestinal barrier function.
• To analyze changes in gastroduodenal, small intestinal, and colonic permeability.
• To evaluate stress-induced alterations in gut barrier integrity markers.

Main Methods:

• Healthy subjects underwent a tandem skydive and a control visit.
• Intestinal permeability was measured using a multi-sugar urinary recovery test.
• Salivary cortisol and plasma markers of barrier function were analyzed.

Main Results:

• Skydiving significantly increased salivary cortisol levels post-activity.
• No significant changes were observed in gastroduodenal, small intestinal, or colonic permeability.
• Plasma markers indicated no enterocyte damage, suggesting preserved barrier integrity.

Conclusions:

• Acute, intense psychological stress from skydiving does not compromise intestinal permeability in healthy individuals.
• Sustained stress exposure models may be more appropriate for studying stress effects on the human gut barrier.
• This study highlights the resilience of the intestinal barrier to short-term, high-intensity psychological stress.