Even after accounting for things like cholesterol and blood pressure, the more hours someone spends training over the year, the more likely they are to have plaque in their heart arteries.
Scientific Claim
In middle-aged and older male athletes and active controls, higher objective training duration is independently associated with increased odds of any coronary plaque, even after adjusting for traditional cardiovascular risk factors and years of endurance exercise.
Original Statement
“Q4 participants had significantly higher adjusted odds of ≥1 plaque (OR 5.85, 95% CI 2.33–14.71) versus Q1... adjusted for cardiovascular risk factors and years of endurance exercise.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The authors explicitly adjusted for confounders and used 'associated with' language. The claim correctly reflects the statistical adjustment and observational nature.
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.
Prospective Cohort StudyLevel 2aWhether higher training duration predicts incident plaque development over time, independent of risk factors.
Whether higher training duration predicts incident plaque development over time, independent of risk factors.
What This Would Prove
Whether higher training duration predicts incident plaque development over time, independent of risk factors.
Ideal Study Design
A 10-year prospective cohort of 600 male athletes aged 45–65 with annual wearable-derived training duration, baseline and follow-up CCTA, and repeated measurement of lipids, BP, glucose, and smoking status.
Limitation: Cannot prove causation or determine if plaque leads to reduced training (reverse causality).
Systematic Review & Meta-AnalysisLevel 1aWhether the association between training duration and plaque is consistent across studies after adjusting for confounders.
Whether the association between training duration and plaque is consistent across studies after adjusting for confounders.
What This Would Prove
Whether the association between training duration and plaque is consistent across studies after adjusting for confounders.
Ideal Study Design
A meta-analysis of 10+ studies measuring objective training duration and CCTA plaque burden in athletes, with pooled adjusted ORs for ≥1 plaque per 10h/week increase.
Limitation: Cannot account for heterogeneity in how 'duration' is defined or measured.
Cross-Sectional StudyLevel 4In EvidenceThe current association between training duration and plaque after adjustment for confounders.
The current association between training duration and plaque after adjustment for confounders.
What This Would Prove
The current association between training duration and plaque after adjustment for confounders.
Ideal Study Design
A cross-sectional study of 222 male athletes and controls with 12 months of wearable-derived training duration and CCTA, adjusted for traditional risk factors and years of training—as performed in this study.
Limitation: Cannot determine temporal sequence or directionality.
Evidence from Studies
Supporting (1)
This study found that older male athletes who trained more hours per week (measured by fitness trackers) were more likely to have early signs of heart plaque, even if they were otherwise healthy — and this link held up even when accounting for other heart risks.