Even after running 230 kilometers, the stiffness of the main arteries in elite runners does not increase, meaning their large blood vessels remain flexible despite major changes in heart rate and blood pressure.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Whether central arterial stiffness remains stable across all ultramarathon distances and conditions, resolving inconsistencies in prior literature.
A systematic review and meta-analysis of all published studies measuring PWV before and after ultramarathons (>200 km) using standardized methods, pooling effect sizes and analyzing heterogeneity by race duration, climate, and measurement timing.
Whether extreme endurance exercise directly causes no change in arterial stiffness compared to moderate exercise.
A crossover RCT with 40 elite runners assigned to complete either a 230-km ultramarathon or a 100-km race with matched intensity and hydration, measuring PWV before, immediately after, and 24 hours after each event.
Whether repeated ultramarathon participation leads to long-term changes in arterial stiffness.
A prospective cohort study following 100 ultramarathon runners over 10 years, measuring PWV annually and correlating cumulative race distance with arterial stiffness progression compared to age-matched controls.
Whether ultramarathon runners have lower baseline PWV than sedentary individuals, suggesting adaptation.
A cross-sectional comparison of PWV in 100 elite ultramarathon runners with >50 completed races and 100 age-matched sedentary controls, all measured under identical conditions.
Whether PWV changes in runners with pre-existing arterial disease after an ultramarathon.
A case series of 10 ultramarathon runners with diagnosed atherosclerosis or hypertension who complete a 230-km race, measuring PWV before and after to assess acute vascular response.