Here’s how and why you should set up cardio fitness on Apple Watch and iPhone

One of the valuable, and lesser-known health features of Apple Watch is cardio fitness. The measurement is based on your VO₂ max which Apple Watch can estimate when recording three specific workouts. Follow along for a look at how to use cardio fitness on Apple Watch and iPhone including why it’s important, how to set it up, and how to measure/view cardio fitness levels.

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