Use the cardio interference rule to place Zone 2 around leg day, protect strength, and build conditioning without random ...

Few would disagree that cardio, also called aerobic exercise, is good for your health. Of the 10 most common chronic diseases, seven are "favorably influenced by regular physical activity," according ...

Your daily walk might already count as zone 2 cardio, the same training method used by Tour de France champions. Here's how ...