Wearable fitness trackers aren’t as useless as you think
But what does the latest research say about how effective they are? And sales arepredicted to growover the next five years. The landscape of the market is fast changing. For years, Fitbit and Garmin were the market leaders. It’s free, every week, in your inbox. They show step counts are generally highly accurate, while heart rate and calories burned are reasonably accurate. That is when one goes up so does the other, and vice versa....