Pro ultramarathoner Mike Wardian won the last-man-standing race after completing more than 262 miles in 63 hours.

Kilgore has raised over $10,000 to help New York City small businesses and healthcare workers.

So you want to train like one of the world's fittest athletes? Learn how some of SI's 2020 Fittest 50 athletes get an edge on the competition—and how you can incorporate their methods into your life, too.

The alpine ski racer is known for her high-energy workouts and intense training schedule, but she counts on two very basic strategies for success: dozes and data.

How does one fuel the body before—and during—a 100-mile run, day after day? Ultra-marathoner Jim Walmsley shares his dietary habits and tricks for going the (ultra) distance.

It's one of the most complex, contentious questions in sports: Who are the fittest athletes in the world? Sports Illustrated ranked the best-conditioned male and female athletes in all sports on the 2020 Fittest 50 list.

What measures and benchmarks should we use when comparing athletes of all shapes and sizes, from disparate sports? Here's an inside look at how SI choose its 2020 Fittest 50 and why Simone Biles and Giannis Antetokounmpo are this year's top athletes.

He was whisked away by a jet ski that traveled up to 60 mph.

Four-time Olympian and New York City Marathon champion Shalane Flanagan opens up about her decision to retire, her career legacy and transition to coaching with Nike's Bowerman Track Club.

Nike CEO Mark Parker will step down from his position in January 2020 and be replaced by John Donahoe.