Regular exercise is an important part of living a healthy life, but some research suggests intense exercise may do more harm than good. A new study challenges previous findings and suggests that those ...

What you need to know about high-intensity interval training, or HIIT. By Gretchen Reynolds For the past five years or so, high-intensity interval training, or HIIT, has been one of the most popular ...

Dr Augustine says that people with a low resting heart rate who feel dizzy or faint should seek medical attention, too.