Not like us: Exploring the cardiovascular consequences of ultramarathons.

This article explores the cardiovascular consequences of ultramarathons, which are running events longer than a marathon. The study examines the acute effects of extreme endurance exercise on peripheral micro- and macrovascular function and central hemodynamics before, during, and after a 50 km ultramarathon. The findings suggest that 50 km ultramarathon training does not impair macrovascular function and challenge the hypothesis of a "J-shaped" relationship between exercise volume and cardiovascular health. However, more studies are needed to gain further insight into this relationship and determine the potential threshold at which exercise training might start to confer cardiovascular harm. [Extracted from the article]