But what is zone 2 cardio, exactly? How can you make sure you're doing it right? And is it really so bad if your heart rate ...

This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. Zone 2 training is a type of cardio exercise where you use your heart rate as a guide to help you find the right intensity for ...

“Zone 2” is the term the fitness world has (mostly ... As I’ve explained before, the name “zone 2” comes from heart rate training. To train by heart rate, you use either a wristwatch ...