high knees

If you needed any further convincing on the benefits of high-intensity interval training (HIIT)—or short bursts of intense exercise broken up by brief moments of rest—some of the biggest names in health and fitness joined forces to release a study proving that a simple and quick, five-move workout routine can indeed work wonders for your body.

The names attached to the study, published last month in the International Journal of Exercise Science, include some of the most prominent figures in the field: Martin Gibala, Ph.D., professor of kinesiology at Canada's McMaster University, author of The One-Minute Workout, and perhaps the world's top expert on the science of interval training, and Michael Joyner, MD, a physiologist, anesthesiologist, and world-renowned expert in human performance at the Mayo Clinic.