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. Source: “Accuracy in Wrist-Worn, Sensor-Based Measurements of Heart Rate and Energy Expenditure in a Diverse Cohort,” Journal of Personalized Medicine, 2017
