I wonder about the need of MVC record if I'm going to register EMG signal during 60 m race walking trials. Is there a better method to normalize muscle activity while performing such dynamic movements?
using comparative accessment of pre- stress and post- stress dynamics is a convenient instrument for variety of diognosis.
one more way to do it is normalise each muscle activity to the maximum value you have obtained for that respective muscle in that trial( in case you do the analysis without concatenation.) bur you perform concatenation, normalise w.r.t to max value of all trials, in that way you make sure your signal value is [0-1].
ref: to the walking section in
https://neurolab.gatech.edu/wp/wp-content/uploads/ting/papers/Ting%20and%20Chvatal%202010.pdf
"Is there any need to record MVC ...?" evokes a clear response: Yes! To have a commonly accepted reference for the individual muscle situation allows comparison to other research.
"If there is a better method to obtain a reference?" is a more difficult question, because the usually applied method to determine MVC is not dynamic. Why not using a series of 5 MVC measurements (periodically up-down) within 10 s, and doing this before and after your experiment. Then, you obtain a measure for the periodic load, too.
it is a preliminary need for analysis your signals, so for this purpose you can do some jumping attempt trials and record them as the references.
,
See Albertus-Kajee et al Alternative methods of normalising EMG during running. J Electromyogr Kinesiol. 2011 Aug;21(4):579-86.
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