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Zone 2 Training Was Meant to Fix Everything. A New Review Says It Might Be Overrated

A 2025 Sports Medicine review argues Zone 2 training may not be uniquely optimal for building mitochondria. Here is what runners should change and what they should keep.

Ultrarunner Pablo Espinosa Was Sent Home to Die. He Chose Clinical Trials, and He Is Still Lacing Up

Ultrarunner Pablo Espinosa was placed in palliative care after a stage-four cancer diagnosis. He is now in an experimental trial, and his message is one line: one step at a time.

A Spanish Mechanic Started Running at 66. At 82 He Has the VO2 Max of a 20-Year-Old

Juan López García began running at 66 and could not finish a mile. At 82, he holds the world 50K ultra record for his age group and a VO2 max never seen before over 80.

At 67, She Became the First Woman Ever Over 65 to Break 3 Hours in a Marathon

At 67, Japanese runner Mariko Yugeta ran 2:59:02 at the Kobe Marathon, becoming the first woman over 65 to break three hours. Here is how she did it.

A World Cup Referee Runs 8 Miles Per Match. Here Is the Fitness Test They Have to Pass.

FIFA referees cover eight miles a match and sprint on demand. The two-part fitness test they pass every year is one runners can try at any track.

Podiatrists Reveal the Truth About Wearing Running Shoes at the Gym

Running shoes and strength shoes are built for opposite jobs. Podiatrists explain why lifting in cushioned trainers can quietly work against you.

Wildfire Smoke and Running: When to Move Your Workout Indoors

Smoky skies from wildfires push air quality into dangerous territory. Here is the exact AQI number where you should trade the trail for the treadmill.

Runners Are Chasing Protein. Sports Nutritionists Say It Is Quietly Making Them Slower.

Runners are adding protein to everything. Sports nutritionists say the missing nutrient in most training plans is carbs, and the pace numbers show it.

The 30-Minute At-Home Strength Session That Cuts a Runner's Injury Risk in Half

A no-gym, no-nonsense strength routine built for runners. Two 30-minute sessions a week improve pace, protect joints, and reshape running form.

Josh Kerr Just Broke a 27-Year Mile Record Nobody Thought Would Fall

Josh Kerr ran 3:42.66 at the London Diamond League to break Hicham El Guerrouj's 27-year mile world record. Inside the race, the splits, and what it means.