Your Smartwatch May Be Getting 6 Key Health Metrics Wrong

Smartwatches and other wearables often estimate key health metrics instead of directly measuring them, including calories burned, steps, heart rate, sleep stages, and recovery.

Accuracy can vary widely by activity and by person, so some readings may be far less reliable than users assume.

Because people use these numbers to guide eating, training, rest, and sleep decisions, inaccurate data can lead to poor choices.