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Old Dec 16th 2011, 04:12 PM   #1
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Could you please tell me what in laymanís terms normalisation of EMG means

Hi there, thx for your time and help. Thatís if you can.

Could you please tell me what in laymanís terms normalisation of EMG means, I see it means you need to do this when taking readings of different people or muscle groups. If you do a test like I did below, or anyone does on an EMG machine, have you got to normalise the data ??? As we are trying to find with repetition speed, done in the same time frame uses the most muscle activity, force/strength. We found that the fast used nearly 20% more; however a friend is saying that this EMG has to be normalised, or it does not show the deceleration phase. I think that the basic EMG I took, is basically the muscle activity, force/strength used as I donít understand if you need to normalisation EMG, or what it means.

There is a huge debate going on, on many forums and over six years now, as some say physics equations work the total or overall force/strength to be the same in the below. However as I think other, because you fail faster in the faster reps and you use more energy, more physical work is done, also you move the weight more distance in the same time frame, I decided to buy an EMG machine, and here are the results.

Could you please say what the results mean, do they basically mean what I think, in that as the faster reps have more muscle activity, that means if there is higher levels of muscle activity there is more total or overall force/strength being used by the muscle.

Just did another few tests/studies, hereís one on the Multi Biceps, with 4 pads over my Biceps. The load was a bit light on this test, got about 23 reps on fast for the time span the EMG machine recorded, so upped the weight for the next 2 test/studies. You can see what 1 to 7 means below.

First is the most important, as it shows the EMG average muscle activity, or muscle force/strength used, as we know, the higher the average, the higher the total/overall force/strength used.

1, Fast 409, Slow 349,
2, Fast 437, Slow 346,
3, Fast 0.1, Slow 0.3,
4, Fast 0.6, Slow 0.7,
5, Fast 1104, Slow 1114,
6, Fast 146.0, Slow 193.4,
7, Fast 175.0, Slow 173.0,



1/ WRK This is the work average for the session measured in [ĶV]
AVG microvolts. The average readings will vary from one patient to
another.

2/ RST This is the rest average for the session measured in ĶV - Below
AVG 4 ĶV a muscle is beginning to rest.

3/ AVG This is the average onset of muscle contraction measured in
ONST seconds, readings below 1 second can be considered normal.

4/ AVG This is the average muscle release measured in seconds,
RLSE readings below 1 second can be considered normal.

5/ W/R This is the average peak value measured in ĶV - The value will
PEAK vary from one patient to another.

6/ WRK This is the average muscle deviation when contracting the
AVDV muscle. Readings of below 20% of WRKAVG can be
considered adequate, below 12% can be considered good.

7/ RST This is the average muscle deviation when the muscle is at rest.
AVDV Below 4 ĶV a muscle is beginning to rest.


Wight used roughly 80%

Fast, 6 reps at .5/.5 = 6 seconds, or/and 24 reps at .5/.5 = 24 seconds.

Slow, 1 rep at 3/3 = 6 seconds, or/and 4 reps at 3/3 = 24 seconds.


I would say more overall or total force/strength was used in the faster reps. I define overall or total as if you only have 100 force/strength, that the fast would use more of this up.


http://www.tensmachines.co.uk/NeuroTrac-ETS-EMG-For-the-Professional_p_133.html


Wayne
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