It’s hard for many people to imagine running (or walking) a standard marathon of 26.2 miles, let alone topping that distance with a so-called ultramarathon that could stretch to as much as 100 miles or more. And researchers still know very little about what such grueling treks can do to the human body.
Image Courtesy of Sura Nualpradid / FreeDigitalPhotos.net
To read the original article: What Ultramarathons Do to the Body | Observations, Scientific American Blog Network
