21 Sneaky Signs You Had a Successful Workout

Runners Essentials

21 Signs of a Successful Workout That Have Nothing to Do With Sweat or Soreness Cindy Kuzma • It’s not always easy to gauge whether you’ve had a successful workout—and that’s especially true if you’ve been...

Iron and 2,3-DPG are Wonderful Things

Runners Daily Vitamin

Scott W. Tunis MD FACS | Iron is the element in hemoglobin in our red cells that binds and carries oxygen. It’s also why our blood is red. Low in Iron = less oxygen delivery...