They are an almost-impossible test of the human body and spirit, yet the number of ultramarathons has increased 1,000% over the last decade. Adharanand Finn asks what’s behind this rapid increase – and whether racing 100 miles or more is actually good for you
A while ago, I was standing at the office tea point when a colleague who had heard I was a runner asked me if I did ultramarathons – the term for any foot race longer than the 26.2 miles of a standard marathon. He looked disappointed when I told him I didn’t.
“Triathlons?” he asked.