Ultramarathon

Runners pass by a large video screen commemorating the 70th anniversary of the founding of Communist China during the Beijing Marathon in Beijing, Nov. 3, 2019.

China’s ultramarathoners sound alarm on lack of safety precautions at races 

Sports

Ultramarathoning is a dangerous sport, and runners accept a certain amount of risk when they compete. But some runners in China say they have seen the sport’s organizers cut corners at the risk of safety, which puts athletes in harm’s way.

Competitors run in the 2013 Badwater Ultramarathon in Death Valley National Park, California. The 135-mile (217 km) race, which bills itself as the world's toughest foot race, goes from Death Valley to Mt. Whitney, California. Temperatures can reach 130 d

Ultrarunning tests the outer boundaries of human endurance, but doctors say it’s still safe

Science