- Apr 12, 2001
Apple Watch tracks your movement and heart rate. It uses that information in conjunction with your gender, height, age, and weight to estimate how many calories you burn during daily movement, including light strolls and dedicated workouts.
However, Apple Watch needs proper calibration to get the most accurate reading of your movement and heart rate, which is used to help determine distance and pace measurements when you are walking or running without your iPhone, or while using a treadmill.
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Article Link: How to Calibrate Apple Watch for a More Accurate Offline Workout