If we are coaches, we usually start from the left, so the mirror demonstration members will start from the right. Because when doing aerobics classes, we advocate starting from the far end, that is, the tip of the right foot. If we start from the left, our heart load will be greater than that from the right. Because of the different physical qualities of members and coaches, coaches usually adopt mirror-image normal education (that is, face-to-face teaching is in the same direction as members' movements, but the left and right are opposite), so that our bodies can gradually adapt to the intensity of exercise, and then increase some heavy exercise.