Muscle electrical stimulation technology. The full name of EMS is ElectricalMuscleStimulation, that is, muscle electrical stimulation technology; By simulating neuroelectric signals, involuntary muscle contraction is induced, which greatly improves the training efficiency. EMS simulates human brain signals and directly transmits motion signals to muscles to make them contract strongly. The current used in EMS electrical stimulation is milliampere, so it will not cause harm to human body.