High-intensity interval training (HIIT) has captured a lot of attention lately because of its simple message: If you exercise hard enough, you can get just as fit in less time.

Even the U.S. Department of Health and Human Services buys this concept to some degree. It recommends at least 2.5 hours per week of moderate exercise, but it also says a minute of vigorous exercise equals two minutes of moderate exercise.  Continue reading High-Intensity Interval Training May Not Save Time →