Analysis Version
v1
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assertion
Analysis v1
Supported

Athletes who train a lot have plaque, but it’s hard and rock-like, so it doesn’t break off and cause heart attacks like softer plaque does.

51
Pro
48
Against

Evidence from Studies

Supporting (2)

51

Community contributions welcome

46

Relationship Between Lifelong Exercise Volume and Coronary Atherosclerosis in Athletes

Cross-Sectional Study
Human
2017 Jul 11
36

Differences in coronary vasodilatory capacity and atherosclerosis in endurance athletes using coronary CTA and computational fluid dynamics (CFD): Comparison with a sedentary lifestyle.

Cohort Study
Human
2020 Sep

The study found that people who do lots of endurance exercise have less dangerous, soft plaque in their heart arteries and more of the harder, calcified kind—which is less likely to break off and cause heart attacks.

Contradicting (1)

48

Community contributions welcome

48

Alterations in the autonomic and haemodynamic response to prolonged high‐intensity endurance exercise in individuals with coronary artery calcification

Cross-Sectional Study
Human
2025 Mar

The study found that people who do a lot of intense endurance exercise are more likely to have calcium buildup in their heart arteries, but it didn’t check if that calcium makes the plaque safer or more dangerous — so we can’t say the claim is true based on this study.

Similar Assertions

High-intensity endurance exercise, when accumulated over long durations, is associated with a significantly increased prevalence of coronary artery plaque, an association not detected using self-reported exercise metrics.

60
0
84%

High-volume, high-intensity endurance exercise increases coronary artery plaque burden without increasing all-cause or cardiovascular mortality risk in otherwise healthy individuals.

65
0
84%

Older athletes who train hard for many years tend to have more calcium deposits and fatty buildups in their heart arteries, but these buildups are usually hard and stable, not soft and dangerous.

1
0
84%

Even though athletes are super fit, their heart plaques aren’t more stable or ‘safer’ than those of healthy non-athletes—so being an elite athlete doesn’t make plaque less dangerous.

60
0
82%

Even though super-fit people have more calcium in their heart arteries, they still live longer and have fewer heart attacks — their fitness seems to protect them from the danger of the plaque.

1
0
82%

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