A handy health and fitness feature with watchOS and iOS is the ability to see your heart rate zones on Apple Watch and iPhone. Read on for what they mean, how to see your max heart rate, manually edit your zones, and more.
A handy health and fitness feature with watchOS and iOS is the ability to see your heart rate zones on Apple Watch and iPhone. Read on for what they mean, how to see your max heart rate, manually edit your zones, and more.