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Reduction of the Plasma Concentration of C-Reactive Protein Following Nine Months of Endurance Training
Abstract
An intense physical exercise induces an inflammatory reaction as demonstrated by the delayed increase in blood of acute phase proteins and among them of C-reactive protein (CRP). There is also evidence for a diminished acute phase reaction due to regular exercise suggesting a suppression of the inflammatory response through training. With this background CRP was measured by a sensitive enzyme immunoassay under resting conditions before and after 9 months of training in 14 subjects preparing for a marathon with the aim of studying the effect of training on the base-line CRP concentration. The mean distance run per week increased significantly from 31 +/- 9 km at the beginning to 53 +/- 15 km after 8 months of training (p < 0.01). The aerobic capacity rose significantly after training as demonstrated by the increase of running velocity during a maximal treadmill test from 3.82 +/- 0.29 m/s pre-training to 4.17 +/- 0.17 m/s post-training at a blood lactate concentration of 4 mmol/L (p < 0.01). In 10 of 12 runners base-line CRP was diminished after training in spite of a continuous increase of training intensity. The CRP median fell from 1.19 mg/L before to 0.82 mg/L after training (p < 0.05). Since intense physical exercise is known to be associated with an inflammatory reaction of muscles and tendons, the CRP decrease was unexpected. In 2 subjects the CRP concentration rose markedly because of a borrelia infection and a knee injury, respectively. These values were caused by a pathological condition and were not considered for the statistical evaluation. In 10 non-training control subjects the CRP median did not change significantly during the same 9 months period. The decrease of the CRP base-line concentration after training suggests that intensive regular exercise has a systemic anti-inflammatory effect. This is of particular interest with regard to several recent reports confering on the concentration of CRP in plasma a predictive value for the risk of cardiac infarction, venous thrombosis or stroke.
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“Cross-sectional studies demonstrate an association between physical inactivity and low-grade systemic inflammation in healthy subjects [71–75], in elderly people [76, 77], and in patients with intermittent claudication [78].”
From Exercise as a Mean to Control Low‐Grade Systemic Inflammation (2008) · cites this paper as [75]
In the citing paper
“Moreover, the finding in longitudinal studies that regular training induces a reduction in CRP level suggests that the physical activity as such may suppress systemic low-grade inflammation [74, 75, 79, 80].”
From Exercise as a Mean to Control Low‐Grade Systemic Inflammation (2008) · cites this paper as [75]
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Metadata
- Authors
- Mattusch, Dufaux, Heine, Mertens, & Rost
- Affiliations
- German Sport University Cologne (DE)
- Venue
- International Journal of Sports Medicine
- Publisher
- Georg Thieme Verlag KG
- Published
- 2000-01
- Volume
- 21
- Issue
- 1
- Pages
- 21-24
- ISSN
- 0172-4622 (ISSN-L)
- 1439-3964
- OpenAlex
- W2052205324
- Cited by
- 389
- References
- 0
- Citations by year
- 2026: 6 · 2025: 3 · 2024: 3 · 2023: 8 · 2022: 9 · 2021: 10 · 2020: 7 · 2019: 7 · 2018: 10 · 2017: 13 · 2016: 14 · 2015: 15 · 2014: 17 · 2013: 15 · 2012: 25
- FWCI
- 8.44
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- International Journal of Sports Medicine (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Physiology (medical) › Exercise and Physiological Responses
- Health Sciences › Medicine › Physiology (medical) › Cardiovascular and exercise physiology
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Effects of Exercise
- Keywords
- C-reactive protein, endurance training, marathon training, acute phase proteins, cardiorespiratory fitness, running speed, exercise-induced inflammation, cardiovascular risk prediction
- MeSH terms
- Acute-Phase Reaction, Adult, C-Reactive Protein, Cardiovascular Diseases, Humans, Immunoenzyme Techniques, Inflammation, Male, Physical Endurance, Running, Biomarkers
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