Fitness trackers make it possible to exercise smarter. These wearable devices gather information on sleeping patterns, eating habits and training sessions, before presenting them in graphs that are easy to understand. Owners can use this information to make decisions about what they eat, the kind of exercises they do and their workout intensity.
A heart rate monitor is becoming more common on fitness bands with this feature available on more than half the models we tested. Wearing a stand-alone heart rate monitor is difficult because of their large size, but by integrating them with an unobtrusive fitness tracker, it should be easier for people exercising to identify if they're in a heart rate zone ideal for burning fat, improving endurance or increasing performance.
We update this article every time we test the latest fitness trackers and smartwatches with fitness functions.