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Anaerobic exercise induces moderate acute phase response.
1Institute of Sports and Preventive Medicine, University of Saarland, 66041 Saarbrücken, Germany. t.meyer@rz.uni-sb.de
Medicine and Science in Sports and Exercise
|April 3, 2001
Summary
Repeated short anaerobic exercise causes a stronger immune response than a single bout, with inflammation markers detectable 24 hours later. Athletes should monitor training intensity to avoid prolonged inflammation.
Area of Science:
- Exercise Physiology
- Immunology
- Sports Science
Background:
- Understanding the immune system's response to different exercise protocols is crucial for optimizing training and preventing overtraining.
- Anaerobic exercise, particularly high-intensity intervals, is known to elicit significant physiological stress.
Purpose of the Study:
- To compare the immune system's reaction following a single bout of anaerobic exercise versus repeated short bouts.
- To investigate the duration and intensity of inflammatory markers post-exercise.
Main Methods:
- Twelve healthy males underwent a single 60-second all-out test (SMT) and a repeated bout protocol (AN-TS) on a cycle ergometer in a randomized order.
- Blood samples were analyzed for neutrophils, premacrophages, interleukin-6 (IL-6), interleukin-8 (IL-8), C-reactive protein (CRP), and cortisol at various time points post-exercise.
Main Results:
- Repeated anaerobic exercise (AN-TS) induced a significantly stronger neutrophil increase and a delayed peak in premacrophages compared to a single bout (SMT).
- Interleukin-6 (IL-6) levels were significantly elevated for longer after AN-TS. C-reactive protein (CRP) remained elevated 24 hours post-AN-TS, indicating an acute phase response.
- No significant changes were observed in IL-8 levels, while cortisol showed transient changes not significantly different between protocols.
Conclusions:
- Repeated short bouts of anaerobic exercise trigger a more pronounced acute phase response than a single bout.
- Athletes engaging in frequent high-intensity interval training should be aware of potential prolonged inflammatory effects, with markers detectable up to 24 hours post-exercise.