The Apple Watch can now track and measure your cardio fitness. It can also send you a notification every few months letting you know if your cardio fitness is low for your demographic. While you have to enable the notifications, if you did so by mistak...

The Apple Watch can now track and measure your cardio fitness. It can also send you a notification every few months letting you know if your cardio fitness is low for your demographic. While you have to enable the notifications, if you did so by mistake or just want to turn them off, here’s how.