
An EMS device (or Electrical Muscle Stimulator) is essentially an electronic machine with the capacity to induce involuntary muscle contraction via an electrical impulse. The electrical impulse provides pain relief and also facilitates the strengthening of weak muscles.
One potential reason is that when you consciously contract a muscle, at best, it engages only 30% of muscle fibers in a state of contraction. The remaining 70% remain dormant....