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.
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.
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.
Kenya's Eliud Kipchoge ran 1:59:40 under optimal conditions in Vienna to make history as the first man to break two hours for the marathon.