The trial took place at the University of Pittsburgh between 2010 and 2012, and it involved more than 470 adults between the ages of 18 and 35. All of them were put on a low-calorie diet, had group counseling sessions and were advised to increase their physical activity. Six months into the intervention, all were given telephone counseling sessions, text-message prompts and study materials online.
At that time, though, half were also given wearable tech devices that monitored their activity and connected to a website to help provide feedback. All participants were followed for 18 more months.
At the end of the two years, which is pretty long for a weight loss study, those without access to the wearable technology lost an average of 13 pounds. Those with the wearable tech lost an average of 7.7 pounds.
It’s hard for many to accept, so I’m going to state the results again: Those people who used the wearable tech for 18 months lost significantly less weight than those who didn’t.
You may rightfully point out that the primary reason to wear the devices isn’t to lose weight — it’s to be more active. But even in this respect, it didn’t work nearly as well as we might hope. In the IDEA trial, those who employed the technology were no more physically active than those who didn’t. They also weren’t more fit.
--Aaron Carroll, NYT, on the dubious health benefits of wearable fitness devices