For decades, cardio has been seen as essential—but new insights are challenging that belief.

Think your cardio routine is the secret to heart health? Fitness expert Rubén Ávila challenges the myths of the treadmill and ...

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 ...

Q: I enjoy strength training and do it a few times a week. I’m also active in my daily life. But I don’t do cardio workouts.

Apple Watch: Zone 2 is 60-70% of your heart rate reserve, with your “resting” heart rate set to either 72 or a number the ...