Iron deficiency

According to alarming new research, iron deficiency is on the rise in the U.S. Here’s why that’s a problem for runners, and six strategies to ensure that you're getting enough.

If you're feeling constantly fatigued, tired throughout the day, or frequently experience mid-run weakness, it may be low ferritin levels. Here's what to do.

Why it's best to wait for the off-season to give blood.

Eating teff, an iron-rich grain found in Africa, can boost iron levels—and athletic performance.

The missing piece from most training plans? An effective fueling strategy.

Why are low iron levels so common in runners?

Check out Mario Fraioli's author page.