# Does EMG read the total or overall force/strength in this case

1. Jan 18, 2012

### waynexk8

We are having a debate on the General Physics forum, its which uses the most force, please see below. Not highest, so I bought an EMG machine, to give out a practical experiment, as all know, the machine that reads the electrical activity in the muscles, the force or strength that the muscles are using.

Question
Does my EMG read the total or overall force/strength put out by the muscles in the set time, if not what please ???

Here is the EMG machine.
http://www.tensmachines.co.uk/NeuroTrac-ETS-EMG-For-the-Professional_p_133.html [Broken]

First I thought 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 [µV]
AVG microvolts. The average readings will vary from one patient to
another.

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

MORE thank a big thank you for your time and help.

Which uses the most force/strength, not highest, but most overall or total force, in that if you did 6 repetitions lifting 80% of your 1RM {repetition maximum} 20 inch up and 20 inch down, at .5/.5 {that’s .5 of a second concentric, and .5 of a second eccentric} = 6 seconds, too lifting the same weight 1 time at 3/3 = 6 seconds.

1, You fail far faster in the faster repetitions.
2, You use more energy in the faster repetitions.
3, You cover more distance in the faster repetitions.
4, The EMG readings are higher.
5, You accelerate for far longer in the faster repetitions.

Wayne

Last edited by a moderator: May 5, 2017