The three rings of Apple Watch indicate that the red ring is active, the green ring is moving and the blue ring is standing. The closed-loop conditions are 420 calories of exercise, 30 minutes of exercise and standing 12 hours. /strong & gt；

AppleWatch relies on the heart rate sensor on the back of the watch to measure the real-time heart rate, thus defining which time period is exercising. AppleWatch's "sports" require walking to a fast pace. Experts believe that walking can't achieve the fitness effect, and only walking quickly can play an exercise role to a certain extent.