Are Fitness Trackers Worth It?
A new paper published in JAMA Internal Medicine shows that these devices are not even correctly performing their most basic function, which is accurately measuring physical activity and estimating energy expenditure.Researchers in Japan compared 12 wearable fitness devices, including the popular Fitbit and Jawbone devices, with two "gold standard" research techniques, the metabolic chamber method, which captured all metabolic activity in a 24-hour period, and the doubly-label