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90 Grams of Carbs an Hour: The Fueling Rule Rewriting Marathon Times

Elite marathoners now take 90 to 120 grams of carbs per hour. Here is the research behind it, the GI trade-off, and what recreational runners should actually do.

Soreness or Injury? The 4 Signs That Decide Whether to Run Through It

DOMS fades, injury does not. Here are the four clinical signs that separate normal soreness from a real injury, and the exact rule for each.

Jensen Huang Keeps Telling Graduates to "Run, Don't Walk," and New Runners Should Listen

Jensen Huang tells graduates to run, don't walk. Here is what his favorite line teaches new runners, and why just 5 to 10 minutes a day can count.

Jensen Huang Did 100 Push-Ups Every Night at Age Nine, and Runners Should Steal the Habit

Jensen Huang did 100 push-ups every night at age nine. Here is what the science says push-ups do for runners, and how to build the habit safely.

Chow Yun-fat Is 71 and Runs 5K Every Morning, and His Half Marathon Times Keep Getting Faster

Chow Yun-fat, 71, has run 5K a day for nearly eight years, lost 13 kg, and got faster at the half marathon from age 68 to 69. Here is his routine.

At 75, He Ran the Athens Marathon Barefoot in Hoplite Armor and Closed the Race to an Ovation

Idomeneas Avramakis, 75, ran the Athens Authentic Marathon barefoot in ancient hoplite armor, years after intensive care and a metal rod in his leg.

The 80/20 Rule Most Runners Get Wrong: Why Easy Days Should Feel Embarrassingly Slow

The 80/20 training rule separates fast runners from stuck ones. Here is what polarized training actually looks like, backed by Stephen Seiler research.

7 Signs You Are Running Your Easy Days Too Hard

Grey-zone easy runs quietly destroy progress. These seven signs reveal if you are running your easy days too fast, and what to do about each one.

Six Weeks After Running Berlin in Crocs, Iskander Yadgarov Just Ran a 2:28 Marathon in Jeans

Six weeks after running Berlin in Crocs, Iskander Yadgarov ran 2:28:29 in jeans at the Porto Marathon, smashing the denim mark by over five minutes.

Best Gifts for Runners This Holiday Season, Picked by Runners

The holiday gifts runners actually use, from socks and fuel to safety lights and recovery slides, plus the 4 presents they quietly regift.