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 ...

Cardio zones aren't real—not in the way your fitness app makes them sound, anyway. Yes, heart rate zones are a way to describe how hard you're working during a cardio workout, like running or cycling.

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.

Some research helps to demonstrate this source of fuel change that happens during fasted cardio. For example, a systematic ...