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the claim
Excessive running negatively impacts cardiovascular and joint health
the verdict
CONTESTED
the evidence cuts both ways
confidence 49/100

While moderate running offers well-documented cardiovascular benefits, the evidence regarding excessive or ultra-endurance running is contested, with some studies pointing to potential risks for long-term cardiovascular and musculoskeletal health while others find running generally safe and not directly linked to increased arthritis.

The evidence we hold leans leans supported

How this was weighed

official record 3x · fact-check 2x · hedged 1x · crowd & reference 1x

  • Cardiovascular Effects and Benefits of Exercise · peer-reviewed · supports · weight 2 · 2018
  • Are There Deleterious Cardiac Effects of Acute and Chronic E · peer-reviewed · supports · weight 2 · 2015
  • Potential Long-Term Health Problems Associated with Ultra-En · peer-reviewed · supports · weight 1.6 · 2021
  • Physiology and Pathophysiology of Marathon Running: A narrat · peer-reviewed · refutes · weight 1.3 · 2025
  • Does Running Increase the Risk of Hip and Knee Arthritis? A · peer-reviewed · refutes · weight 1.05 · 2024
Evidence for · 3
Cardiovascular Effects and Benefits of Exercise
2018 · cited by 835
Notes that continuously high levels of exercise like marathon running could have detrimental effects on cardiovascular health.
Evidence against · 2
Physiology and Pathophysiology of Marathon Running: A narrative Review.
2025 · cited by 14
Concludes that marathon training is generally safe for human health and individual organ systems, providing overall cardiovascular and systemic benefits.
See more details
More for · 2
Are There Deleterious Cardiac Effects of Acute and Chronic Endurance Exercise?
2015 · cited by 223
Examines how extremes of endurance exercise may increase cardiovascular disease risk and markers for cardiac events.
Potential Long-Term Health Problems Associated with Ultra-Endurance Running: A Narrative Review
2021 · cited by 109
Highlights mounting evidence that ultra-endurance running may lead to long-term health problems and potential cardiovascular maladaptation.
More against · 1
Does Running Increase the Risk of Hip and Knee Arthritis? A Survey of 3804 Marathon Runners.
2024 · cited by 4
Finds no significant association between cumulative running history (such as marathons completed and weekly mileage) and the risk of hip or knee arthritis.
The paper trail · every fact has a biography
first checked02 Aug 2026
judged → CONTESTED · 4902 Aug 2026
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