The Study
Cell-free plasma DNA as a novel marker of aseptic inflammation severity related to exercise overtraining.
This study watched 17 guys over time and saw that their body chemicals changed after hard workouts. It shows a pattern, but not proof that one thing caused another — like noticing ice cream sales and sunburns both go up in summer, but not proving one causes the other.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
When guys who work out regularly do intense weight training for 12 weeks, more DNA floats in their blood, especially when the workouts are hardest. This goes back to normal after rest.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 525 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes, the changes show the body is under more stress during heavy training, which could help spot overtraining.
- 2Plasma DNA went up after each hard training phase and back down after rest.
- 3CRP went up 300% then 400%, CK rose only at the end, and uric acid kept rising with more training.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Clinical chemistry
Year
2006
Authors
I. Fatouros, A. Destouni, Konstantinos Margonis, A. Jamurtas, C. Vrettou, D. Kouretas, G. Mastorakos, A. Mitrakou, K. Taxildaris, E. Kanavakis, I. Papassotiriou
Related Content
Claims (5)
When guys who work out regularly do intense training, their blood DNA levels go up — and go back down when they rest. This might mean DNA levels can show how stressed their bodies are from too much exercise.
When guys who work out regularly do a 12-week strength training program, their body's inflammation goes up more and more as the workouts get harder — 3 times higher by week 8 and 4 times higher by week 12.
Guys who work out regularly might only start showing signs of muscle damage after the third month of a strength training plan, possibly because the workouts get too intense or they’re not recovering enough.
When guys who work out regularly do a 12-week weight training program, their body's uric acid goes up more and more as the program goes on, especially by the end — which might mean their bodies are under increasing stress from the workouts.
When guys who work out regularly do a 12-week strength training program, the more they train, the more DNA floating in their blood goes up — and that might be a sign their body is dealing with hidden inflammation from overdoing it.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.