how to use a fitness tracker to reach your goalsFitness trackers now are equipped with everything from pedometers to heart rate monitors and nutrition logs. But just how accurate are they? A recent study in the kinesiology department at Iowa State University put the newest, wrist-worn fitness monitors to the test.

The study was coordinated by Yang Bai, a third-year Ph.D. student at Iowa State University, and supervised by Dr. Greg Welk, professor in kinesiology and lab director.

The team...