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Neuro-immuno-endocrine modulation in marathon runners.
Andre L L Bachi1, Francisco J O Rios, Pedro Henrique Carr Vaisberg
1Department of Microbiology and Immunology, Federal University of São Paulo, São Paulo, Brazil.
Neuroimmunomodulation
|August 30, 2014
Summary
Marathon runners show elevated growth hormone (GH) and cytokine production at rest, suggesting physiological preparation for strenuous exercise. Post-race, immune markers temporarily increase but return to baseline, indicating adaptive responses in athletes.
Area of Science:
- Exercise Physiology
- Neuroendocrinology
- Immunology
Background:
- Athletic training disrupts homeostasis, necessitating integrated neuroendocrine and immune system responses.
- Understanding these adaptations is crucial for optimizing athlete recovery and performance.
Purpose of the Study:
- To investigate the relationship between cytokines, hormones, and mood states in marathon runners.
- To compare physiological markers between marathon runners and sedentary individuals.
Main Methods:
- Serum levels of growth hormone (GH), cortisol, and interleukins 8 and 10 were measured in 20 male marathon runners and 20 sedentary males.
- Cytokine production by peripheral blood mononuclear cells was assessed.
- Mood states were evaluated using the Brunel Mood Scale (BRUMS).
- Samples were collected from runners at rest, immediately post-marathon, and 72 hours post-marathon.
Main Results:
- At rest, athletes exhibited higher serum GH and spontaneous IL-8 and IL-10 production compared to sedentary individuals.
- Post-marathon, all measured serum parameters significantly increased.
- Seventy-two hours post-marathon, serum hormone and cytokine levels normalized, but spontaneous cytokine production decreased.
Conclusions:
- Elevated resting GH and cytokine production in marathon runners suggest pre-exercise adaptive mechanisms.
- These findings highlight the complex interplay between the neuroendocrine and immune systems in response to endurance exercise.
- The study provides insights into the physiological readiness and recovery processes of marathon athletes.
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