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the effective penetration depth of hifem is 8cm, covering the whole neural network and driving the contraction of the whole muscle layer; the effect of fat apoptosis and "super muscle exercise" can never be achieved by physical exercise;studies in the united states have shown that the effect of four treatments is the the treatment experience is good. most of the energy of the current is concentrated in the surface layer, only a small part can reach the muscle;feeling a slight tingling or contraction;.syi