Excessive High-Intensity Exercise May Temporarily Weaken Immune System: Study
Research suggests that too much vigorous exercise could temporarily impact the immune system, particularly in individuals with demanding jobs.
A recent study reveals that engaging in excessive high-intensity exercise may temporarily weaken the immune system. Researchers examined samples from 11 firefighters undergoing rigorous training and analyzed over 4,700 post-exercise fluid molecules. The findings indicate that individuals in physically demanding professions, such as emergency responders and athletes, may face a higher risk of illness after intense workouts. The study emphasizes the importance of balance and recovery in training to protect overall health. Scientists from the Pacific Northwest National Laboratory studied blood, saliva, and urine samples, uncovering significant molecular changes caused by intense physical stress. These findings are particularly relevant for those in high-risk professions, opening the door for further research on how high-intensity exercise affects the immune system. 'Heat stress can be life-threatening,' noted Kristin Burnum-Johnson, a study author. 'We aimed to understand the body's response to exhaustion and potentially reduce exercise-related risks for first responders, athletes, and military members.' The team observed hundreds of molecular changes, reflecting the body's efforts to manage tissue damage, fluid balance, energy demands, and protein regeneration. The research, published in Military Medical Research, may explain why some individuals are more susceptible to respiratory infections post-workout.