French ultrarunner suffers cardiac arrest at the Marathon des Sables

The medical director was on the scene within several minutes, but ultimately the runner passed away

American man celebrates turning 80 by going for 80-mile run

This was the 40th consecutive year that Hoefgen used exercise to celebrate his birthday

Meet Aleksandr Sorokin, the man behind the new 24-hour world record

Sorokin spoke to us about his 24-hour world record, how he got into ultrarunning and junk food