Principle of rocker: the rocker can make the body produce some aerobic exercise through mechanical vibration, so as to achieve the effect of slimming. Beauty seekers should know that this involuntary vibration of muscle and adipose tissue will not consume energy. Of course, local skin and tissues will also have a certain degree of fever reaction, which is due to the increase of blood circulation caused by vibration, but this increase of blood circulation will not consume too much energy, so beauty seekers will not achieve the corresponding slimming effect through this way of exercise. Beauty seekers really need to keep their mouths shut, then spread their legs and do real energy output exercises in order to achieve the corresponding effect of reducing fat and slimming.