According to the research of human neurology, EMS can directly act on muscle nerves through 600 electronic pulse currents per minute, directly reach the fat body, stimulate the densest nerves and induce muscle contraction.

Generally speaking, if you insist on using it, the effect is still good, and you can see a certain effect.

Almost no harm. After all, the current of this kind of thing is not very big, don't worry.