I'm creating a study which looks to compare the muscle activity (using EMG) of two barbell squat variations during an acute resistance exercise bout. Is there currently a valid method that can use the EMG output obtained from the bout that would allow me to estimate local muscle fatigue?
Actually, what do you want to know?-The methodology or the permitted data acquisition protocol???
I am sure this reference (below) can help. Good Luck!
Article Interpretation of EMG changes with fatigue: Facts, pitfalls,...
" EMG amplitude characteristics are predominantly used when causes for fatigue are analysed. We aimed to demonstrate theoretical grounds for pitfalls and fallacies in analysis of experimental results if changes in intracellular action potential (IAP), i.e. in peripheral factors of muscle fatigue, were not taken into consideration. "
EMG can only provide an estimate of fatigue due to failure of action potential conduction on the myofiber plasmalemma or to processes more proximal (e.g., central fatigue). EMG cannot detect fatigue due to processes distal to action potential conduction on the myofiber plasmalemma (e.g., SR calcium release, decreased calcium sensitivity of the contractile proteins). The site(s) and mechanism(s) of fatigue are quite variable and are dependent on the type and duration of exercise being performed.
It is possible to extract features from the EMG signal which can correlate to fatigue.
Article EMG Processing Based Measures of Fatigue Assessment during M...
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