EMS Explained
Muscle Stimulation is referred to as NMES (Neuromuscular Electrical Stimulation) or EMS (Electrical Muscle Stimulation) and is useful for rehabilitation of muscles following injury or stroke. The device is technically similar to TENS (Transcutaneous Electrical Nerve Stimulation) but is powerful enough to achieve a strong muscle contraction. The stimulation phases on-and-off to mimic conventional exercise and thus will cause strengthening of the muscle fibers and increase in muscle "tone."
How does an Electronic Muscle Stimulator (EMS) work?
Using EMS, the brain sends a nerve impulse to the "motor point" of your muscle. This signal is a message to the muscles to expand and contract. Electrodes are placed over the motor points of the muscle group to be exercised. When the stimulation is applied through the pads, the signal finds it way to these motor points and causes the muscle to expand and contract. This makes it possible to duplicate conventional exercise.
During an exercise, your brain sends a message down the spinal cord through the nerves with all the muscles you're using that causes them to relax and contract. This is called voluntary muscle action. Your brain is controlling the muscle.
Electrical muscle stimulation uses an outside electrical source that stimulates the nerves to send signals to your muscle to expand and contract. This is done by sending electrical current through self adhesive electrodes placed over the muscle. The current passes through your skin to the nerves in that area, causing the muscle to expand and contract.
Studies have shown that EMS stimulates large nerve axons (long outgrowths of a nerve cell body), some of which you cannot stimulate voluntarily. It is possible that EMS might allow for additional muscle hypertrophy (increased development of tissue by enlargement, without multiplication of cells).
EMS can increase muscle hypertrophy (growth), endurance and strength. EMS may be used only for this or with regular weight training by aiding recovery and helping muscles grow and get stronger. EMS can increase body temperature, heart rate and metabolism (promoting energy and fat absorption from the body).
Indications for the EMS are:
Relaxation of muscle spasm
Prevention or retardation of disuse atrophy
Increasing local blood circulation
Muscle re-education
Immediate post-surgical stimulation of calf muscles to prevent venous thrombosis
Maintaining or increasing range of motion
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