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Electronic Muscle Stimulator (EMS):
EMS Explained


Electronic Muscle Stimulator (EMS):

What is EMS?


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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:

  1. Relaxation of muscle spasm
  2. Prevention or retardation of disuse atrophy
  3. Increasing local blood circulation
  4. Muscle re-education
  5. Immediate post-surgical stimulation of calf muscles to prevent venous thrombosis
  6. Maintaining or increasing range of motion 

You May Also Wish to Read: Electronic Muscle Stimulator (EMS) & Bodybuilding


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Consumer Product Use Warning

TENS & EMS units and other units on the Medword site are sold with the understanding that the consumer will only use the products for their intended purpose. Medword, its agents, suppliers, and manufacturers only warrant that these units will perform the functions stated. No medical cure should be inferred and Medword does not hold forth that these units will perform any other physical effect than that which is stated. For user safety and optimum results, we strongly recommend the usage of these units and placement of electrodes be under the supervision of a Chiropractor, Podiatrist, Physical Therapist, Doctor of Osteopathy, Medical Doctor, Dentist, Nurse Practitioner, PH.D., or Doctor of Acupuncture. Units should not be used if the person has: a pacemaker; a heart condition; epilepsy, and/or; is pregnant.

  1. Do not use electrical stimulation over carotid sinus nerves (throat), eyes, or nose.
  2. The long-term effects of chronic use of electrical stimulation are unknown.
  3. This device is a symptomatic treatment and suppresses the sensation of pain, which would otherwise serve as a protective mechanism.
  4. Do not immerse device in water or other liquids.
  5. The use of heat or cold producing devices, such as electric heating blankets, heating pads, or ice packs, may impair the performance of the electrode or alter the patient's circulation/sensitivity and increase the risk of injury to the patient.
  6. Units should not be used if the person has: a pacemaker; heart condition; epilepsy, and/or; is pregnant.


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Electrode Skin Prep
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Electrode Skin Prep
2 Fluid Oz. Bottle

Recommended For Use
With All Electrodes

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12.99
TENS Conductive Spray
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TENS Conductive Spray
2 oz. Bottle

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With All Electrodes

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14.99
Tac Gel
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Tac Gel 2 oz. Tube

Recommended For Use
With No-Gel Electrodes

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14.99

TENS & EMS Units as Therapy:

TENS (Transcutaneous Electrical Nerve Stimulator) units, EMS (Electronic Muscle Stimulator) units are an accepted form of therapy by Western medicine in the treatment of specific musculoskeletal conditions. These units are commonly used by medical doctors, medical rehabilitation specialists, and medical physiotherapists to treat specific symptoms. These professionals often "prescribe" where the TENS electrodes & EMS electrodes should be placed on the body. Please refer to the bibliography of medical citations in our article found here. Always consult a licensed physician before starting any type of medical therapy.


Supplier Guarantee & Return Policy

Medword Medical Sales, through our supplier, guarantees 100% customer satisfaction. If you are not 100% satisfied with the results you are receiving from your EMS or TENS machine or electrodes, as long as the order is returned in good condition within 30 days, you will be issued a full refund. Medword's supplier is the low-price leader and promises to match all competitors prices. The TENS units and EMS come with a 5 Year Warranty. If you are having any problems with your EMS or TENS unit, send it back to our supplier and a new replacement unit will be shipped out to you immediately.






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