NMES ( neuromuscular electrical stimulation )
It is thought that NMES works by creating an action potential in the muscle via the motor nerves, which will lead to a contraction in the muscles.
NMES is used when trying to train the muscles, perhaps above all, atrophied muscles, which can cause it to increase in intensity and volume. They also use it to increase circulation, reduce muscle tone, neuromuscular connection / synchronization of improvement and to alleviate pain. Pain relief works a bit like AL-TENS.
Advantages of NMES is that it does not burden the ranks, get a good neurogenic contact, give a good response in type 2 muscle fibers and has a low energy consumption.
NMES and training
- One can increase the strength of the muscle by NMES / current
- One can increase the muscle volume
- It is believed that NMES combined with exercise increases the effect of the training
- Contraction time and rest periods are to be taken into account
- At atrophy should use a shorter contraction time and a longer rest.
- Is not normally pain in joint
- Provides a better neurogenic contact
- Provides a better response in type 2 fibers
- small energy consumption
Treatment and NMES
When dealing with NMES and choose the frequency you must first decide if you want a single or tetaniska contractions. Few want to have when the objective is that? and tetaniska happens when you turn up the frequency so much that the membrane potential did not have time to be restored between contractions. To meet the different muskelfibrena (type1, typ2a, typ2b), you have to set the Hz along. This is due to muskelfibrenas membrane potential, various refractory period (the time when the action potential has just taken place and new stimulation can not produce new action potential).
- Type 1, 33Hz
- Type 2a, 66Hz
- Type 2b, 110Hz
- 50Hz has seen hits all three types.
If your purpose is to increase circulation in the area of NMES, you should instead try to be at a frequency of 8-9Hz, which will provide the greatest venous return per contraction. It has been seen using Doppler that is when the largest circulation increase occurs. If you want to have the opposite effect, ie reducing circulation so you can put on 13Hz. This will give a tetanic contraction of type 1 fibers which will restrict the circulation in the area.
- 8-9Hz increased circulation
- 13Hz reduced circulation
To reduce muscle tone with NMES, there is research on how that fungarar. It is assumed that there are effects similar to other manual therapies such as stretch, pressur, dry needling, etc. To use NMES to reduce muscle tone makes use of two variants, twitch contractions or static contractions.
- 1-2Hz spasmodic contractions
- 100Hz static contractions
When selecting fastid so should we think along the two factors. How gross motor and / or atrophied muscle in question. Height of fastid will give a longer contraction time and less idle time. Fair to be between a contraction time of 4-10 seconds and a rest period of 6-20 seconds.
Intensity / power is determined by how sharp contraction we want. This is done in consultation with the patient. The conclusion is that the weaker and the more atrophied muscle contraction time, the shorter and longer rest periods. Vice versa. Investment is like AL-TENS on the motor points of the muscles and the treatment should be between 10-20 minutes.
Disadvantages of NMES
One gets the NMES not improved function in muscle and lose därme more general factors of training. It also has a small power consumption, which means that it is not so good for example weight loss as regular exercise.