Everything to Know About the 4x4x48 Challenge and Whether It’s Worth a Try

Everything to Know About the 4x4x48 Challenge and Whether It’s Worth a Try

You’ll rack up a lot of miles in this challenge, so read this before jumping into it.

New Research Points to a Link Between Artificial Sweeteners and Increased Fat Stores

This study suggests certain sugar substitutes can alter body composition.

Exactly How to Acclimate to the Heat During Race Training

With temperatures breaking records, we’ve got you covered with these expert tips on how to perform your best through spicy conditions.

Camille Herron Opens up about Perimenopause and Running

The world record-setting pro ultrarunner is sharing her experiences so others don’t have to go through it alone.

“Goons” Invade Olympic Gold Medalist Kipchoge Keino’s 196-Acre Farm

The former world record holder alleges that an “unknown number of goons armed with machetes, bows, and arrows” took over his land during a legal dispute.

The Races Runner’s World Editors Can’t Wait to See at the World Championships

There is so much good action to watch for next week, but we picked some of our most-anticipated races.