How Accurate Is Your Fitness Tracker?

They’re not a good fit for calorie counters.


If you’re relying on the gadget around your wrist to lose weight, you might need to rethink your game plan. A team from Stanford University recently investigated how good some leading consumer fitness trackers were at monitoring heart rate and calculating calories burned, or energy expenditure. After a group of 60 volunteers tested the fitness bands, researchers realized that while most of the devices measured heart rate well, they all failed to accurately gauge energy expenditure.

Enter your email address for instant access!

By signing up you will also receive Discover’s free e-newsletter and occasional special offers. We will not sell or distribute your email address to any third party at any time.