You can learn about the power of your cycling workouts by viewing Power Zone information on your AppleWatch. Power Zones are based on an estimate of your functional threshold power (FTP)—available after you connect your AppleWatch to Bluetooth-enabled cycling accessories, such as power meters, speed sensors, and cadence sensors.
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Note: Power Zones are calculated only if you’ve entered your date of birth, height, and weight in the Fitness app on your iPhone.
