You might think running a marathon is tough, but imagine going much, much further. Ultramarathons push human endurance to its absolute limits, revealing surprising risks beyond just sore muscles.
The recent attention on Rachel Entrekian highlights the extreme dangers inherent in ultramarathon running.
Rachel Entrekian, a prominent ultramarathoner, recently shared her harrowing experience of suffering a severe brain injury during a 200-mile race in Utah.